about summary refs log tree commit diff
path: root/tests/ui
diff options
context:
space:
mode:
authorThe Miri Cronjob Bot <miri@cron.bot>2024-04-25 05:04:32 +0000
committerThe Miri Cronjob Bot <miri@cron.bot>2024-04-25 05:04:32 +0000
commitff6fc757815055923e7f7ff73eaed8f9cbcfba75 (patch)
treebfd3766e077a0f447004b74063ad40ec02cd00e3 /tests/ui
parentbed7caf20638dde1822553d432f6fe213baf4eae (diff)
parentcb3752d20e0f5d24348062211102a08d46fbecff (diff)
downloadrust-ff6fc757815055923e7f7ff73eaed8f9cbcfba75.tar.gz
rust-ff6fc757815055923e7f7ff73eaed8f9cbcfba75.zip
Merge from rustc
Diffstat (limited to 'tests/ui')
-rw-r--r--tests/ui/associated-types/issue-25700.stderr5
-rw-r--r--tests/ui/async-await/async-outside-of-await-issue-121096.stderr2
-rw-r--r--tests/ui/async-await/await-keyword/incorrect-syntax-suggestions.stderr10
-rw-r--r--tests/ui/async-await/coroutine-not-future.rs23
-rw-r--r--tests/ui/async-await/coroutine-not-future.stderr42
-rw-r--r--tests/ui/async-await/issues/issue-51751.stderr2
-rw-r--r--tests/ui/async-await/issues/issue-62009-1.stderr6
-rw-r--r--tests/ui/async-await/issues/issue-62009-2.stderr2
-rw-r--r--tests/ui/async-await/issues/issue-65419/issue-65419-coroutine-resume-after-completion.rs10
-rw-r--r--tests/ui/async-await/issues/non-async-enclosing-span.stderr2
-rw-r--r--tests/ui/async-await/non-trivial-drop.rs2
-rw-r--r--tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_dfl.rs8
-rw-r--r--tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_ign.rs8
-rw-r--r--tests/ui/attributes/unix_sigpipe/unix_sigpipe-inherit.rs31
-rw-r--r--tests/ui/auto-traits/typeck-auto-trait-no-supertraits-2.stderr7
-rw-r--r--tests/ui/binop/binop-consume-args.stderr140
-rw-r--r--tests/ui/binop/binop-move-semantics.stderr41
-rw-r--r--tests/ui/borrowck/borrowck-move-by-capture.stderr6
-rw-r--r--tests/ui/borrowck/borrowck-move-out-of-static-item.stderr5
-rw-r--r--tests/ui/borrowck/borrowck-move-subcomponent.stderr5
-rw-r--r--tests/ui/borrowck/borrowck-overloaded-call.stderr5
-rw-r--r--tests/ui/borrowck/clone-on-ref.stderr12
-rw-r--r--tests/ui/borrowck/issue-101119.stderr5
-rw-r--r--tests/ui/borrowck/issue-103624.stderr5
-rw-r--r--tests/ui/borrowck/issue-119915-bad-clone-suggestion.stderr5
-rw-r--r--tests/ui/borrowck/issue-17718-static-move.stderr5
-rw-r--r--tests/ui/borrowck/issue-20801.stderr20
-rw-r--r--tests/ui/borrowck/move-error-in-promoted-2.stderr5
-rw-r--r--tests/ui/borrowck/move-error-snippets.stderr7
-rw-r--r--tests/ui/borrowck/move-in-static-initializer-issue-38520.stderr10
-rw-r--r--tests/ui/box/leak-alloc.stderr5
-rw-r--r--tests/ui/coherence/coherence-with-coroutine.rs1
-rw-r--r--tests/ui/coherence/coherence-with-coroutine.stock.stderr2
-rw-r--r--tests/ui/const-generics/generic_const_exprs/const-block-is-poly.rs2
-rw-r--r--tests/ui/const-generics/generic_const_exprs/const-block-is-poly.stderr6
-rw-r--r--tests/ui/const-generics/generic_const_exprs/const_kind_expr/relate_ty_with_infer_2.rs2
-rw-r--r--tests/ui/const-generics/generic_const_exprs/inline-const-in-const-generic-defaults.rs1
-rw-r--r--tests/ui/const_prop/dont-propagate-generic-instance-2.rs2
-rw-r--r--tests/ui/consts/closure-structural-match-issue-90013.rs1
-rw-r--r--tests/ui/consts/const-block-const-bound.rs2
-rw-r--r--tests/ui/consts/const-blocks/fn-call-in-const.rs1
-rw-r--r--tests/ui/consts/const-eval/heap/alloc_intrinsic_zero_sized.rs1
-rw-r--r--tests/ui/consts/const-eval/heap/dealloc_intrinsic_zero_sized.rs1
-rw-r--r--tests/ui/consts/issue-102117.rs2
-rw-r--r--tests/ui/coroutine/addassign-yield.rs8
-rw-r--r--tests/ui/coroutine/auto-trait-regions.rs8
-rw-r--r--tests/ui/coroutine/auxiliary/metadata-sufficient-for-layout.rs1
-rw-r--r--tests/ui/coroutine/auxiliary/unwind-aux.rs5
-rw-r--r--tests/ui/coroutine/auxiliary/xcrate-reachable.rs1
-rw-r--r--tests/ui/coroutine/auxiliary/xcrate.rs12
-rw-r--r--tests/ui/coroutine/borrow-in-tail-expr.rs4
-rw-r--r--tests/ui/coroutine/borrowing.rs6
-rw-r--r--tests/ui/coroutine/borrowing.stderr16
-rw-r--r--tests/ui/coroutine/check-resume-ty-lifetimes-2.rs8
-rw-r--r--tests/ui/coroutine/check-resume-ty-lifetimes-2.stderr12
-rw-r--r--tests/ui/coroutine/check-resume-ty-lifetimes.rs15
-rw-r--r--tests/ui/coroutine/check-resume-ty-lifetimes.stderr6
-rw-r--r--tests/ui/coroutine/clone-impl-static.rs5
-rw-r--r--tests/ui/coroutine/clone-impl-static.stderr16
-rw-r--r--tests/ui/coroutine/clone-impl.rs17
-rw-r--r--tests/ui/coroutine/clone-impl.stderr84
-rw-r--r--tests/ui/coroutine/clone-rpit.next.stderr12
-rw-r--r--tests/ui/coroutine/clone-rpit.rs1
-rw-r--r--tests/ui/coroutine/conditional-drop.rs6
-rw-r--r--tests/ui/coroutine/control-flow.rs12
-rw-r--r--tests/ui/coroutine/coroutine-region-requirements.rs4
-rw-r--r--tests/ui/coroutine/coroutine-resume-after-panic.rs4
-rw-r--r--tests/ui/coroutine/coroutine-with-nll.rs1
-rw-r--r--tests/ui/coroutine/coroutine-with-nll.stderr2
-rw-r--r--tests/ui/coroutine/coroutine-yielding-or-returning-itself.rs6
-rw-r--r--tests/ui/coroutine/coroutine-yielding-or-returning-itself.stderr16
-rw-r--r--tests/ui/coroutine/derived-drop-parent-expr.rs8
-rw-r--r--tests/ui/coroutine/discriminant.rs6
-rw-r--r--tests/ui/coroutine/drop-and-replace.rs5
-rw-r--r--tests/ui/coroutine/drop-control-flow.rs20
-rw-r--r--tests/ui/coroutine/drop-env.rs8
-rw-r--r--tests/ui/coroutine/drop-track-addassign-yield.rs6
-rw-r--r--tests/ui/coroutine/drop-tracking-parent-expression.rs6
-rw-r--r--tests/ui/coroutine/drop-tracking-parent-expression.stderr18
-rw-r--r--tests/ui/coroutine/drop-tracking-yielding-in-match-guards.rs4
-rw-r--r--tests/ui/coroutine/drop-yield-twice.rs4
-rw-r--r--tests/ui/coroutine/drop-yield-twice.stderr4
-rw-r--r--tests/ui/coroutine/dropck-resume.rs5
-rw-r--r--tests/ui/coroutine/dropck-resume.stderr2
-rw-r--r--tests/ui/coroutine/dropck.rs5
-rw-r--r--tests/ui/coroutine/dropck.stderr9
-rw-r--r--tests/ui/coroutine/gen_block.e2024.stderr47
-rw-r--r--tests/ui/coroutine/gen_block.none.stderr66
-rw-r--r--tests/ui/coroutine/gen_block.rs9
-rw-r--r--tests/ui/coroutine/issue-102645.rs5
-rw-r--r--tests/ui/coroutine/issue-102645.stderr2
-rw-r--r--tests/ui/coroutine/issue-105084.rs3
-rw-r--r--tests/ui/coroutine/issue-105084.stderr18
-rw-r--r--tests/ui/coroutine/issue-110929-coroutine-conflict-error-ice.rs5
-rw-r--r--tests/ui/coroutine/issue-113279.rs5
-rw-r--r--tests/ui/coroutine/issue-113279.stderr4
-rw-r--r--tests/ui/coroutine/issue-44197.rs4
-rw-r--r--tests/ui/coroutine/issue-45729-unsafe-in-coroutine.rs5
-rw-r--r--tests/ui/coroutine/issue-45729-unsafe-in-coroutine.stderr2
-rw-r--r--tests/ui/coroutine/issue-48048.rs2
-rw-r--r--tests/ui/coroutine/issue-52304.rs1
-rw-r--r--tests/ui/coroutine/issue-52398.rs4
-rw-r--r--tests/ui/coroutine/issue-52398.stderr10
-rw-r--r--tests/ui/coroutine/issue-53548.rs4
-rw-r--r--tests/ui/coroutine/issue-57017.rs6
-rw-r--r--tests/ui/coroutine/issue-57084.rs4
-rw-r--r--tests/ui/coroutine/issue-57084.stderr5
-rw-r--r--tests/ui/coroutine/issue-57478.rs15
-rw-r--r--tests/ui/coroutine/issue-58888.rs2
-rw-r--r--tests/ui/coroutine/issue-61442-stmt-expr-with-drop.rs8
-rw-r--r--tests/ui/coroutine/issue-64620-yield-array-element.rs1
-rw-r--r--tests/ui/coroutine/issue-64620-yield-array-element.stderr13
-rw-r--r--tests/ui/coroutine/issue-68112.rs8
-rw-r--r--tests/ui/coroutine/issue-68112.stderr16
-rw-r--r--tests/ui/coroutine/issue-69017.rs1
-rw-r--r--tests/ui/coroutine/issue-69039.rs1
-rw-r--r--tests/ui/coroutine/issue-87142.rs1
-rw-r--r--tests/ui/coroutine/issue-88653.rs1
-rw-r--r--tests/ui/coroutine/issue-91477.rs1
-rw-r--r--tests/ui/coroutine/issue-91477.stderr13
-rw-r--r--tests/ui/coroutine/iterator-count.rs2
-rw-r--r--tests/ui/coroutine/live-upvar-across-yield.rs4
-rw-r--r--tests/ui/coroutine/match-bindings.rs2
-rw-r--r--tests/ui/coroutine/match-bindings.stderr5
-rw-r--r--tests/ui/coroutine/missing_coroutine_attr_suggestion.fixed8
-rw-r--r--tests/ui/coroutine/missing_coroutine_attr_suggestion.rs8
-rw-r--r--tests/ui/coroutine/missing_coroutine_attr_suggestion.stderr13
-rw-r--r--tests/ui/coroutine/nested_coroutine.rs8
-rw-r--r--tests/ui/coroutine/niche-in-coroutine.rs4
-rw-r--r--tests/ui/coroutine/non-static-is-unpin.rs4
-rw-r--r--tests/ui/coroutine/not-send-sync.rs6
-rw-r--r--tests/ui/coroutine/not-send-sync.stderr8
-rw-r--r--tests/ui/coroutine/overlap-locals.rs5
-rw-r--r--tests/ui/coroutine/panic-drops-resume.rs4
-rw-r--r--tests/ui/coroutine/panic-drops.rs17
-rw-r--r--tests/ui/coroutine/panic-safe.rs4
-rw-r--r--tests/ui/coroutine/parent-expression.rs6
-rw-r--r--tests/ui/coroutine/parent-expression.stderr18
-rw-r--r--tests/ui/coroutine/partial-drop.rs45
-rw-r--r--tests/ui/coroutine/partial-initialization-across-yield.rs8
-rw-r--r--tests/ui/coroutine/pattern-borrow.rs2
-rw-r--r--tests/ui/coroutine/pin-box-coroutine.rs6
-rw-r--r--tests/ui/coroutine/polymorphize-args.rs5
-rw-r--r--tests/ui/coroutine/print/coroutine-print-verbose-1.rs8
-rw-r--r--tests/ui/coroutine/print/coroutine-print-verbose-1.stderr12
-rw-r--r--tests/ui/coroutine/print/coroutine-print-verbose-2.rs6
-rw-r--r--tests/ui/coroutine/print/coroutine-print-verbose-2.stderr4
-rw-r--r--tests/ui/coroutine/print/coroutine-print-verbose-3.rs9
-rw-r--r--tests/ui/coroutine/print/coroutine-print-verbose-3.stderr11
-rw-r--r--tests/ui/coroutine/reborrow-mut-upvar.rs2
-rw-r--r--tests/ui/coroutine/reborrow-mut-upvar.stderr5
-rw-r--r--tests/ui/coroutine/ref-escapes-but-not-over-yield.rs9
-rw-r--r--tests/ui/coroutine/ref-escapes-but-not-over-yield.stderr2
-rw-r--r--tests/ui/coroutine/ref-upvar-not-send.rs6
-rw-r--r--tests/ui/coroutine/ref-upvar-not-send.stderr16
-rw-r--r--tests/ui/coroutine/reinit-in-match-guard.rs6
-rw-r--r--tests/ui/coroutine/resume-after-return.rs12
-rw-r--r--tests/ui/coroutine/resume-arg-late-bound.rs4
-rw-r--r--tests/ui/coroutine/resume-arg-late-bound.stderr2
-rw-r--r--tests/ui/coroutine/resume-arg-size.rs8
-rw-r--r--tests/ui/coroutine/resume-live-across-yield.rs5
-rw-r--r--tests/ui/coroutine/retain-resume-ref.rs5
-rw-r--r--tests/ui/coroutine/retain-resume-ref.stderr2
-rw-r--r--tests/ui/coroutine/size-moved-locals.rs4
-rw-r--r--tests/ui/coroutine/sized-yield.rs5
-rw-r--r--tests/ui/coroutine/sized-yield.stderr7
-rw-r--r--tests/ui/coroutine/smoke-resume-args.rs17
-rw-r--r--tests/ui/coroutine/smoke.rs32
-rw-r--r--tests/ui/coroutine/static-coroutine.rs7
-rw-r--r--tests/ui/coroutine/static-mut-reference-across-yield.rs8
-rw-r--r--tests/ui/coroutine/static-not-unpin.current.stderr6
-rw-r--r--tests/ui/coroutine/static-not-unpin.next.stderr6
-rw-r--r--tests/ui/coroutine/static-not-unpin.rs8
-rw-r--r--tests/ui/coroutine/static-reference-across-yield.rs4
-rw-r--r--tests/ui/coroutine/too-live-local-in-immovable-gen.rs2
-rw-r--r--tests/ui/coroutine/too-live-local-in-immovable-gen.stderr5
-rw-r--r--tests/ui/coroutine/too-many-parameters.rs1
-rw-r--r--tests/ui/coroutine/too-many-parameters.stderr2
-rw-r--r--tests/ui/coroutine/type-mismatch-error.rs3
-rw-r--r--tests/ui/coroutine/type-mismatch-error.stderr2
-rw-r--r--tests/ui/coroutine/type-mismatch-signature-deduction.rs1
-rw-r--r--tests/ui/coroutine/type-mismatch-signature-deduction.stderr6
-rw-r--r--tests/ui/coroutine/uninhabited-field.rs4
-rw-r--r--tests/ui/coroutine/unsized-capture-across-yield.rs1
-rw-r--r--tests/ui/coroutine/unsized-capture-across-yield.stderr2
-rw-r--r--tests/ui/coroutine/unsized-local-across-yield.rs1
-rw-r--r--tests/ui/coroutine/unsized-local-across-yield.stderr2
-rw-r--r--tests/ui/coroutine/yield-in-args-rev.rs2
-rw-r--r--tests/ui/coroutine/yield-in-args-rev.stderr5
-rw-r--r--tests/ui/coroutine/yield-in-args.rs1
-rw-r--r--tests/ui/coroutine/yield-in-args.stderr2
-rw-r--r--tests/ui/coroutine/yield-in-const.rs1
-rw-r--r--tests/ui/coroutine/yield-in-const.stderr8
-rw-r--r--tests/ui/coroutine/yield-in-function.rs1
-rw-r--r--tests/ui/coroutine/yield-in-function.stderr13
-rw-r--r--tests/ui/coroutine/yield-in-initializer.rs2
-rw-r--r--tests/ui/coroutine/yield-in-initializer.stderr5
-rw-r--r--tests/ui/coroutine/yield-in-static.rs1
-rw-r--r--tests/ui/coroutine/yield-in-static.stderr8
-rw-r--r--tests/ui/coroutine/yield-outside-coroutine-issue-78653.rs1
-rw-r--r--tests/ui/coroutine/yield-outside-coroutine-issue-78653.stderr13
-rw-r--r--tests/ui/coroutine/yield-subtype.rs2
-rw-r--r--tests/ui/coroutine/yield-subtype.stderr5
-rw-r--r--tests/ui/coroutine/yield-while-iterating.rs14
-rw-r--r--tests/ui/coroutine/yield-while-iterating.stderr4
-rw-r--r--tests/ui/coroutine/yield-while-local-borrowed.rs8
-rw-r--r--tests/ui/coroutine/yield-while-ref-reborrowed.rs21
-rw-r--r--tests/ui/coroutine/yield-while-ref-reborrowed.stderr6
-rw-r--r--tests/ui/delegation/auxiliary/fn-header-aux.rs9
-rw-r--r--tests/ui/delegation/fn-header.rs57
-rw-r--r--tests/ui/delegation/impl-trait.rs27
-rw-r--r--tests/ui/delegation/not-supported.rs30
-rw-r--r--tests/ui/delegation/not-supported.stderr75
-rw-r--r--tests/ui/delegation/rename.rs20
-rw-r--r--tests/ui/derives/deriving-with-repr-packed.stderr5
-rw-r--r--tests/ui/drop/dynamic-drop.rs4
-rw-r--r--tests/ui/error-codes/E0504.stderr5
-rw-r--r--tests/ui/error-codes/E0505.stderr5
-rw-r--r--tests/ui/error-codes/E0507.stderr5
-rw-r--r--tests/ui/error-codes/E0508-fail.stderr5
-rw-r--r--tests/ui/error-codes/E0508.stderr5
-rw-r--r--tests/ui/error-codes/E0509.stderr5
-rw-r--r--tests/ui/feature-gates/feature-gate-closure_track_caller.rs2
-rw-r--r--tests/ui/feature-gates/feature-gate-closure_track_caller.stderr6
-rw-r--r--tests/ui/feature-gates/feature-gate-coroutines.e2024.stderr26
-rw-r--r--tests/ui/feature-gates/feature-gate-coroutines.none.stderr32
-rw-r--r--tests/ui/feature-gates/feature-gate-coroutines.rs2
-rw-r--r--tests/ui/feature-gates/feature-gate-inline_const.rs6
-rw-r--r--tests/ui/feature-gates/feature-gate-inline_const.stderr13
-rw-r--r--tests/ui/fn/fn_def_coercion.rs58
-rw-r--r--tests/ui/fn/fn_def_coercion.stderr154
-rw-r--r--tests/ui/fn/fn_def_opaque_coercion.rs69
-rw-r--r--tests/ui/fn/suggest-return-closure.rs1
-rw-r--r--tests/ui/fn/suggest-return-closure.stderr9
-rw-r--r--tests/ui/impl-trait/issues/issue-58504.rs2
-rw-r--r--tests/ui/impl-trait/lifetimes.rs2
-rw-r--r--tests/ui/impl-trait/normalize-tait-in-const.rs1
-rw-r--r--tests/ui/impl-trait/normalize-tait-in-const.stderr6
-rw-r--r--tests/ui/impl-trait/recursive-coroutine-boxed.next.stderr9
-rw-r--r--tests/ui/impl-trait/recursive-coroutine-boxed.rs3
-rw-r--r--tests/ui/impl-trait/recursive-coroutine-indirect.current.stderr6
-rw-r--r--tests/ui/impl-trait/recursive-coroutine-indirect.next.stderr6
-rw-r--r--tests/ui/impl-trait/recursive-coroutine-indirect.rs2
-rw-r--r--tests/ui/impl-trait/recursive-impl-trait-type-indirect.rs2
-rw-r--r--tests/ui/impl-trait/recursive-impl-trait-type-indirect.stderr8
-rw-r--r--tests/ui/inline-const/const-expr-array-init.rs2
-rw-r--r--tests/ui/inline-const/const-expr-basic.rs2
-rw-r--r--tests/ui/inline-const/const-expr-generic-err.rs1
-rw-r--r--tests/ui/inline-const/const-expr-generic-err.stderr16
-rw-r--r--tests/ui/inline-const/const-expr-generic-err2.rs2
-rw-r--r--tests/ui/inline-const/const-expr-generic-err2.stderr2
-rw-r--r--tests/ui/inline-const/const-expr-generic.rs1
-rw-r--r--tests/ui/inline-const/const-expr-inference.rs2
-rw-r--r--tests/ui/inline-const/const-expr-lifetime-err.rs1
-rw-r--r--tests/ui/inline-const/const-expr-lifetime-err.stderr2
-rw-r--r--tests/ui/inline-const/const-expr-lifetime.rs1
-rw-r--r--tests/ui/inline-const/const-expr-macro.rs2
-rw-r--r--tests/ui/inline-const/const-expr-reference.rs2
-rw-r--r--tests/ui/inline-const/const-match-pat-lifetime.rs1
-rw-r--r--tests/ui/inline-const/elided-lifetime-being-infer-vars.rs2
-rw-r--r--tests/ui/inline-const/expr-unsafe-err.rs1
-rw-r--r--tests/ui/inline-const/expr-unsafe-err.stderr2
-rw-r--r--tests/ui/inline-const/expr-unsafe.rs2
-rw-r--r--tests/ui/inline-const/expr-with-block-err.rs2
-rw-r--r--tests/ui/inline-const/expr-with-block-err.stderr2
-rw-r--r--tests/ui/inline-const/expr-with-block.rs2
-rw-r--r--tests/ui/inline-const/instance-doesnt-depend-on-type.rs2
-rw-r--r--tests/ui/inline-const/interpolated.rs2
-rw-r--r--tests/ui/inline-const/promotion.rs1
-rw-r--r--tests/ui/inline-const/promotion.stderr2
-rw-r--r--tests/ui/inline-const/required-const.rs1
-rw-r--r--tests/ui/inline-const/required-const.stderr6
-rw-r--r--tests/ui/invalid-compile-flags/print.rs1
-rw-r--r--tests/ui/invalid-compile-flags/print.stderr4
-rw-r--r--tests/ui/issues/issue-17385.stderr10
-rw-r--r--tests/ui/issues/issue-24357.rs2
-rw-r--r--tests/ui/issues/issue-24357.stderr7
-rw-r--r--tests/ui/issues/issue-4335.stderr8
-rw-r--r--tests/ui/lifetimes/unusual-rib-combinations.rs2
-rw-r--r--tests/ui/lifetimes/unusual-rib-combinations.stderr16
-rw-r--r--tests/ui/lint/invalid_from_utf8.rs1
-rw-r--r--tests/ui/lint/invalid_from_utf8.stderr42
-rw-r--r--tests/ui/lint/must_not_suspend/tuple-mismatch.rs5
-rw-r--r--tests/ui/lint/must_not_suspend/tuple-mismatch.stderr2
-rw-r--r--tests/ui/lint/non-local-defs/consts.rs2
-rw-r--r--tests/ui/lint/non-local-defs/consts.stderr16
-rw-r--r--tests/ui/lint/non-local-defs/from-local-for-global.rs2
-rw-r--r--tests/ui/lint/non-local-defs/from-local-for-global.stderr10
-rw-r--r--tests/ui/lint/unused/issue-74883-unused-paren-baren-yield.rs4
-rw-r--r--tests/ui/lint/unused/unused-closure.rs4
-rw-r--r--tests/ui/liveness/liveness-upvars.rs4
-rw-r--r--tests/ui/loops/dont-suggest-break-thru-item.rs2
-rw-r--r--tests/ui/loops/dont-suggest-break-thru-item.stderr8
-rw-r--r--tests/ui/mir/issue-102389.stderr5
-rw-r--r--tests/ui/moves/borrow-closures-instead-of-move.rs4
-rw-r--r--tests/ui/moves/borrow-closures-instead-of-move.stderr16
-rw-r--r--tests/ui/moves/issue-72649-uninit-in-loop.rs8
-rw-r--r--tests/ui/moves/issue-72649-uninit-in-loop.stderr34
-rw-r--r--tests/ui/moves/issue-75904-move-closure-loop.stderr5
-rw-r--r--tests/ui/moves/move-fn-self-receiver.stderr10
-rw-r--r--tests/ui/moves/move-out-of-array-1.stderr5
-rw-r--r--tests/ui/moves/moves-based-on-type-no-recursive-stack-closure.stderr7
-rw-r--r--tests/ui/moves/use_of_moved_value_copy_suggestions.fixed4
-rw-r--r--tests/ui/moves/use_of_moved_value_copy_suggestions.rs4
-rw-r--r--tests/ui/moves/use_of_moved_value_copy_suggestions.stderr50
-rw-r--r--tests/ui/nll/closure-borrow-spans.stderr6
-rw-r--r--tests/ui/nll/closure-requirements/escape-upvar-nested.stderr3
-rw-r--r--tests/ui/nll/closure-requirements/escape-upvar-ref.stderr2
-rw-r--r--tests/ui/nll/closure-requirements/propagate-multiple-requirements.stderr2
-rw-r--r--tests/ui/nll/coroutine-distinct-lifetime.rs1
-rw-r--r--tests/ui/nll/coroutine-upvar-mutability.rs2
-rw-r--r--tests/ui/nll/coroutine-upvar-mutability.stderr4
-rw-r--r--tests/ui/nll/extra-unused-mut.rs6
-rw-r--r--tests/ui/nll/issue-21232-partial-init-and-use.stderr10
-rw-r--r--tests/ui/nll/issue-27282-move-ref-mut-into-guard.fixed23
-rw-r--r--tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs6
-rw-r--r--tests/ui/nll/issue-27282-move-ref-mut-into-guard.stderr16
-rw-r--r--tests/ui/nll/issue-27282-mutation-in-guard.stderr8
-rw-r--r--tests/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr2
-rw-r--r--tests/ui/nll/issue-48623-coroutine.rs2
-rw-r--r--tests/ui/nll/issue-48623-coroutine.stderr6
-rw-r--r--tests/ui/nll/issue-55850.rs2
-rw-r--r--tests/ui/nll/match-guards-always-borrow.fixed66
-rw-r--r--tests/ui/nll/match-guards-always-borrow.rs6
-rw-r--r--tests/ui/nll/match-guards-always-borrow.stderr20
-rw-r--r--tests/ui/nll/move-errors.stderr30
-rw-r--r--tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.nll.stderr2
-rw-r--r--tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.polonius.stderr2
-rw-r--r--tests/ui/nll/user-annotations/method-ufcs-1.stderr4
-rw-r--r--tests/ui/nll/user-annotations/method-ufcs-2.stderr4
-rw-r--r--tests/ui/packed/packed-struct-drop-aligned.rs10
-rw-r--r--tests/ui/parser/bad-let-else-statement.rs1
-rw-r--r--tests/ui/parser/bad-let-else-statement.stderr76
-rw-r--r--tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr10
-rw-r--r--tests/ui/polymorphization/coroutine.rs6
-rw-r--r--tests/ui/polymorphization/coroutine.stderr6
-rw-r--r--tests/ui/print_type_sizes/coroutine.rs1
-rw-r--r--tests/ui/print_type_sizes/coroutine.stdout2
-rw-r--r--tests/ui/print_type_sizes/coroutine_discr_placement.rs5
-rw-r--r--tests/ui/print_type_sizes/coroutine_discr_placement.stdout2
-rw-r--r--tests/ui/regions/regions-addr-of-upvar-self.stderr2
-rw-r--r--tests/ui/regions/regions-nested-fns-2.stderr3
-rw-r--r--tests/ui/regions/regions-nested-fns.stderr3
-rw-r--r--tests/ui/regions/regions-steal-closure.stderr1
-rw-r--r--tests/ui/rfcs/rfc-2091-track-caller/tracked-closure.rs6
-rw-r--r--tests/ui/sanitizer/cfi-coroutine.rs4
-rw-r--r--tests/ui/simd/const-err-trumps-simd-err.rs2
-rw-r--r--tests/ui/simd/intrinsic/generic-elements-pass.rs1
-rw-r--r--tests/ui/span/send-is-not-static-ensures-scoping.stderr3
-rw-r--r--tests/ui/suggestions/issue-84973-blacklist.rs2
-rw-r--r--tests/ui/suggestions/issue-84973-blacklist.stderr8
-rw-r--r--tests/ui/suggestions/option-content-move2.rs14
-rw-r--r--tests/ui/suggestions/option-content-move2.stderr21
-rw-r--r--tests/ui/suggestions/option-content-move3.rs30
-rw-r--r--tests/ui/suggestions/option-content-move3.stderr95
-rw-r--r--tests/ui/suggestions/unnamable-types.rs4
-rw-r--r--tests/ui/suggestions/unnamable-types.stderr10
-rw-r--r--tests/ui/traits/next-solver/coroutine.fail.stderr54
-rw-r--r--tests/ui/traits/next-solver/coroutine.rs26
-rw-r--r--tests/ui/type-alias-impl-trait/issue-53678-coroutine-and-const-fn.rs1
-rw-r--r--tests/ui/type-alias-impl-trait/issue-58662-coroutine-with-lifetime.rs2
-rw-r--r--tests/ui/type-alias-impl-trait/issue-94429.rs1
-rw-r--r--tests/ui/type-alias-impl-trait/issue-94429.stderr2
-rw-r--r--tests/ui/unboxed-closures/unboxed-closures-failed-recursive-fn-1.stderr7
-rw-r--r--tests/ui/union/union-borrow-move-parent-sibling.stderr5
-rw-r--r--tests/ui/union/union-move.stderr10
-rw-r--r--tests/ui/unop-move-semantics.stderr34
-rw-r--r--tests/ui/variance/variance-issue-20533.stderr15
-rw-r--r--tests/ui/weird-exprs.rs1
369 files changed, 2500 insertions, 1011 deletions
diff --git a/tests/ui/associated-types/issue-25700.stderr b/tests/ui/associated-types/issue-25700.stderr
index fb0e63c207a..8d40e6905e0 100644
--- a/tests/ui/associated-types/issue-25700.stderr
+++ b/tests/ui/associated-types/issue-25700.stderr
@@ -12,7 +12,10 @@ note: if `S<()>` implemented `Clone`, you could clone the value
   --> $DIR/issue-25700.rs:1:1
    |
 LL | struct S<T: 'static>(#[allow(dead_code)] Option<&'static T>);
-   | ^^^^^^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     drop(t);
+   |          - you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/async-await/async-outside-of-await-issue-121096.stderr b/tests/ui/async-await/async-outside-of-await-issue-121096.stderr
index b0677a83864..d7caf6b3c0d 100644
--- a/tests/ui/async-await/async-outside-of-await-issue-121096.stderr
+++ b/tests/ui/async-await/async-outside-of-await-issue-121096.stderr
@@ -2,7 +2,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/async-outside-of-await-issue-121096.rs:7:7
    |
 LL | fn main() {
-   |    ---- this is not `async`
+   | --------- this is not `async`
 ...
 LL |     }.await
    |       ^^^^^ only allowed inside `async` functions and blocks
diff --git a/tests/ui/async-await/await-keyword/incorrect-syntax-suggestions.stderr b/tests/ui/async-await/await-keyword/incorrect-syntax-suggestions.stderr
index 928eb0b821d..a98bb0764c0 100644
--- a/tests/ui/async-await/await-keyword/incorrect-syntax-suggestions.stderr
+++ b/tests/ui/async-await/await-keyword/incorrect-syntax-suggestions.stderr
@@ -141,7 +141,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/incorrect-syntax-suggestions.rs:68:19
    |
 LL | fn foo13() -> Result<(), ()> {
-   |    ----- this is not `async`
+   | ---------------------------- this is not `async`
 LL |     let _ = bar().await();
    |                   ^^^^^ only allowed inside `async` functions and blocks
 
@@ -149,7 +149,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/incorrect-syntax-suggestions.rs:73:19
    |
 LL | fn foo14() -> Result<(), ()> {
-   |    ----- this is not `async`
+   | ---------------------------- this is not `async`
 LL |     let _ = bar().await()?;
    |                   ^^^^^ only allowed inside `async` functions and blocks
 
@@ -157,7 +157,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/incorrect-syntax-suggestions.rs:78:19
    |
 LL | fn foo15() -> Result<(), ()> {
-   |    ----- this is not `async`
+   | ---------------------------- this is not `async`
 LL |     let _ = bar().await;
    |                   ^^^^^ only allowed inside `async` functions and blocks
 
@@ -165,7 +165,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/incorrect-syntax-suggestions.rs:82:19
    |
 LL | fn foo16() -> Result<(), ()> {
-   |    ----- this is not `async`
+   | ---------------------------- this is not `async`
 LL |     let _ = bar().await?;
    |                   ^^^^^ only allowed inside `async` functions and blocks
 
@@ -173,7 +173,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/incorrect-syntax-suggestions.rs:87:23
    |
 LL |     fn foo() -> Result<(), ()> {
-   |        --- this is not `async`
+   |     -------------------------- this is not `async`
 LL |         let _ = bar().await?;
    |                       ^^^^^ only allowed inside `async` functions and blocks
 
diff --git a/tests/ui/async-await/coroutine-not-future.rs b/tests/ui/async-await/coroutine-not-future.rs
index 2993f58378a..45227435507 100644
--- a/tests/ui/async-await/coroutine-not-future.rs
+++ b/tests/ui/async-await/coroutine-not-future.rs
@@ -1,5 +1,5 @@
 //@ edition:2018
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::future::Future;
 use std::ops::Coroutine;
@@ -9,6 +9,7 @@ fn returns_async_block() -> impl Future<Output = ()> {
     async {}
 }
 fn returns_coroutine() -> impl Coroutine<(), Yield = (), Return = ()> {
+    #[coroutine]
     || {
         let _: () = yield ();
     }
@@ -23,9 +24,12 @@ fn main() {
     takes_future(returns_async_block());
     takes_future(async {});
     takes_coroutine(returns_coroutine());
-    takes_coroutine(|| {
-        let _: () = yield ();
-    });
+    takes_coroutine(
+        #[coroutine]
+        || {
+            let _: () = yield ();
+        },
+    );
 
     // async futures are not coroutines:
     takes_coroutine(async_fn());
@@ -38,8 +42,11 @@ fn main() {
     // coroutines are not futures:
     takes_future(returns_coroutine());
     //~^ ERROR is not a future
-    takes_future(|ctx| {
-        //~^ ERROR is not a future
-        ctx = yield ();
-    });
+    takes_future(
+        #[coroutine]
+        |ctx| {
+            //~^ ERROR is not a future
+            ctx = yield ();
+        },
+    );
 }
diff --git a/tests/ui/async-await/coroutine-not-future.stderr b/tests/ui/async-await/coroutine-not-future.stderr
index 580217fb4f8..403e547a753 100644
--- a/tests/ui/async-await/coroutine-not-future.stderr
+++ b/tests/ui/async-await/coroutine-not-future.stderr
@@ -1,5 +1,5 @@
 error[E0277]: the trait bound `impl Future<Output = ()>: Coroutine<_>` is not satisfied
-  --> $DIR/coroutine-not-future.rs:31:21
+  --> $DIR/coroutine-not-future.rs:35:21
    |
 LL |     takes_coroutine(async_fn());
    |     --------------- ^^^^^^^^^^ the trait `Coroutine<_>` is not implemented for `impl Future<Output = ()>`
@@ -7,13 +7,13 @@ LL |     takes_coroutine(async_fn());
    |     required by a bound introduced by this call
    |
 note: required by a bound in `takes_coroutine`
-  --> $DIR/coroutine-not-future.rs:18:39
+  --> $DIR/coroutine-not-future.rs:19:39
    |
 LL | fn takes_coroutine<ResumeTy>(_g: impl Coroutine<ResumeTy, Yield = (), Return = ()>) {}
    |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `takes_coroutine`
 
 error[E0277]: the trait bound `impl Future<Output = ()>: Coroutine<_>` is not satisfied
-  --> $DIR/coroutine-not-future.rs:33:21
+  --> $DIR/coroutine-not-future.rs:37:21
    |
 LL |     takes_coroutine(returns_async_block());
    |     --------------- ^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine<_>` is not implemented for `impl Future<Output = ()>`
@@ -21,27 +21,27 @@ LL |     takes_coroutine(returns_async_block());
    |     required by a bound introduced by this call
    |
 note: required by a bound in `takes_coroutine`
-  --> $DIR/coroutine-not-future.rs:18:39
+  --> $DIR/coroutine-not-future.rs:19:39
    |
 LL | fn takes_coroutine<ResumeTy>(_g: impl Coroutine<ResumeTy, Yield = (), Return = ()>) {}
    |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `takes_coroutine`
 
-error[E0277]: the trait bound `{async block@$DIR/coroutine-not-future.rs:35:21: 35:29}: Coroutine<_>` is not satisfied
-  --> $DIR/coroutine-not-future.rs:35:21
+error[E0277]: the trait bound `{async block@$DIR/coroutine-not-future.rs:39:21: 39:29}: Coroutine<_>` is not satisfied
+  --> $DIR/coroutine-not-future.rs:39:21
    |
 LL |     takes_coroutine(async {});
-   |     --------------- ^^^^^^^^ the trait `Coroutine<_>` is not implemented for `{async block@$DIR/coroutine-not-future.rs:35:21: 35:29}`
+   |     --------------- ^^^^^^^^ the trait `Coroutine<_>` is not implemented for `{async block@$DIR/coroutine-not-future.rs:39:21: 39:29}`
    |     |
    |     required by a bound introduced by this call
    |
 note: required by a bound in `takes_coroutine`
-  --> $DIR/coroutine-not-future.rs:18:39
+  --> $DIR/coroutine-not-future.rs:19:39
    |
 LL | fn takes_coroutine<ResumeTy>(_g: impl Coroutine<ResumeTy, Yield = (), Return = ()>) {}
    |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `takes_coroutine`
 
 error[E0277]: `impl Coroutine<Yield = (), Return = ()>` is not a future
-  --> $DIR/coroutine-not-future.rs:39:18
+  --> $DIR/coroutine-not-future.rs:43:18
    |
 LL |     takes_future(returns_coroutine());
    |     ------------ ^^^^^^^^^^^^^^^^^^^ `impl Coroutine<Yield = (), Return = ()>` is not a future
@@ -50,26 +50,26 @@ LL |     takes_future(returns_coroutine());
    |
    = help: the trait `Future` is not implemented for `impl Coroutine<Yield = (), Return = ()>`
 note: required by a bound in `takes_future`
-  --> $DIR/coroutine-not-future.rs:17:26
+  --> $DIR/coroutine-not-future.rs:18:26
    |
 LL | fn takes_future(_f: impl Future<Output = ()>) {}
    |                          ^^^^^^^^^^^^^^^^^^^ required by this bound in `takes_future`
 
-error[E0277]: `{coroutine@$DIR/coroutine-not-future.rs:41:18: 41:23}` is not a future
-  --> $DIR/coroutine-not-future.rs:41:18
+error[E0277]: `{coroutine@$DIR/coroutine-not-future.rs:47:9: 47:14}` is not a future
+  --> $DIR/coroutine-not-future.rs:47:9
    |
-LL |       takes_future(|ctx| {
-   |  _____------------_^
-   | |     |
-   | |     required by a bound introduced by this call
+LL |       takes_future(
+   |       ------------ required by a bound introduced by this call
+LL |           #[coroutine]
+LL | /         |ctx| {
 LL | |
-LL | |         ctx = yield ();
-LL | |     });
-   | |_____^ `{coroutine@$DIR/coroutine-not-future.rs:41:18: 41:23}` is not a future
+LL | |             ctx = yield ();
+LL | |         },
+   | |_________^ `{coroutine@$DIR/coroutine-not-future.rs:47:9: 47:14}` is not a future
    |
-   = help: the trait `Future` is not implemented for `{coroutine@$DIR/coroutine-not-future.rs:41:18: 41:23}`
+   = help: the trait `Future` is not implemented for `{coroutine@$DIR/coroutine-not-future.rs:47:9: 47:14}`
 note: required by a bound in `takes_future`
-  --> $DIR/coroutine-not-future.rs:17:26
+  --> $DIR/coroutine-not-future.rs:18:26
    |
 LL | fn takes_future(_f: impl Future<Output = ()>) {}
    |                          ^^^^^^^^^^^^^^^^^^^ required by this bound in `takes_future`
diff --git a/tests/ui/async-await/issues/issue-51751.stderr b/tests/ui/async-await/issues/issue-51751.stderr
index ba256b19948..ab12e0427b4 100644
--- a/tests/ui/async-await/issues/issue-51751.stderr
+++ b/tests/ui/async-await/issues/issue-51751.stderr
@@ -2,7 +2,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/issue-51751.rs:9:27
    |
 LL | fn main() {
-   |    ---- this is not `async`
+   | --------- this is not `async`
 LL |     let result = inc(10000);
 LL |     let finished = result.await;
    |                           ^^^^^ only allowed inside `async` functions and blocks
diff --git a/tests/ui/async-await/issues/issue-62009-1.stderr b/tests/ui/async-await/issues/issue-62009-1.stderr
index 02933f4f2f2..f8a4b5d9af8 100644
--- a/tests/ui/async-await/issues/issue-62009-1.stderr
+++ b/tests/ui/async-await/issues/issue-62009-1.stderr
@@ -2,7 +2,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/issue-62009-1.rs:6:23
    |
 LL | fn main() {
-   |    ---- this is not `async`
+   | --------- this is not `async`
 LL |     async { let (); }.await;
    |                       ^^^^^ only allowed inside `async` functions and blocks
 
@@ -10,7 +10,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/issue-62009-1.rs:10:7
    |
 LL | fn main() {
-   |    ---- this is not `async`
+   | --------- this is not `async`
 ...
 LL |     }.await;
    |       ^^^^^ only allowed inside `async` functions and blocks
@@ -19,7 +19,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/issue-62009-1.rs:12:16
    |
 LL | fn main() {
-   |    ---- this is not `async`
+   | --------- this is not `async`
 ...
 LL |     (|_| 2333).await;
    |                ^^^^^ only allowed inside `async` functions and blocks
diff --git a/tests/ui/async-await/issues/issue-62009-2.stderr b/tests/ui/async-await/issues/issue-62009-2.stderr
index 80a831cc547..0004f99f901 100644
--- a/tests/ui/async-await/issues/issue-62009-2.stderr
+++ b/tests/ui/async-await/issues/issue-62009-2.stderr
@@ -2,7 +2,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/issue-62009-2.rs:8:23
    |
 LL | fn main() {
-   |    ---- this is not `async`
+   | --------- this is not `async`
 LL |     (async || 2333)().await;
    |                       ^^^^^ only allowed inside `async` functions and blocks
 
diff --git a/tests/ui/async-await/issues/issue-65419/issue-65419-coroutine-resume-after-completion.rs b/tests/ui/async-await/issues/issue-65419/issue-65419-coroutine-resume-after-completion.rs
index f937311a5a0..6b7dfc1235e 100644
--- a/tests/ui/async-await/issues/issue-65419/issue-65419-coroutine-resume-after-completion.rs
+++ b/tests/ui/async-await/issues/issue-65419/issue-65419-coroutine-resume-after-completion.rs
@@ -6,15 +6,13 @@
 //@ error-pattern:coroutine resumed after completion
 //@ edition:2018
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
-use std::{
-    ops::Coroutine,
-    pin::Pin,
-};
+use std::{ops::Coroutine, pin::Pin};
 
 fn main() {
-    let mut g = || {
+    let mut g = #[coroutine]
+    || {
         yield;
     };
     Pin::new(&mut g).resume(()); // Yields once.
diff --git a/tests/ui/async-await/issues/non-async-enclosing-span.stderr b/tests/ui/async-await/issues/non-async-enclosing-span.stderr
index 91a9e5aa6ca..9c26de1c504 100644
--- a/tests/ui/async-await/issues/non-async-enclosing-span.stderr
+++ b/tests/ui/async-await/issues/non-async-enclosing-span.stderr
@@ -2,7 +2,7 @@ error[E0728]: `await` is only allowed inside `async` functions and blocks
   --> $DIR/non-async-enclosing-span.rs:9:28
    |
 LL | fn main() {
-   |    ---- this is not `async`
+   | --------- this is not `async`
 LL |     let x = move || {};
 LL |     let y = do_the_thing().await;
    |                            ^^^^^ only allowed inside `async` functions and blocks
diff --git a/tests/ui/async-await/non-trivial-drop.rs b/tests/ui/async-await/non-trivial-drop.rs
index 71b88124219..95de3c5b005 100644
--- a/tests/ui/async-await/non-trivial-drop.rs
+++ b/tests/ui/async-await/non-trivial-drop.rs
@@ -8,7 +8,7 @@ fn main() {
 }
 
 fn foo() {
-    || {
+    #[coroutine] || {
         yield drop(Config {
             nickname: NonCopy,
             b: NonCopy2,
diff --git a/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_dfl.rs b/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_dfl.rs
new file mode 100644
index 00000000000..7f95fa7ebbe
--- /dev/null
+++ b/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_dfl.rs
@@ -0,0 +1,8 @@
+//@ aux-crate: sigpipe_utils=sigpipe-utils.rs
+
+#![feature(unix_sigpipe)]
+
+#[unix_sigpipe = "inherit"]
+fn main() {
+    sigpipe_utils::assert_sigpipe_handler(sigpipe_utils::SignalHandler::Default);
+}
diff --git a/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_ign.rs b/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_ign.rs
new file mode 100644
index 00000000000..d96e8b8ef84
--- /dev/null
+++ b/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_ign.rs
@@ -0,0 +1,8 @@
+//@ aux-crate: sigpipe_utils=sigpipe-utils.rs
+
+#![feature(unix_sigpipe)]
+
+#[unix_sigpipe = "inherit"]
+fn main() {
+    sigpipe_utils::assert_sigpipe_handler(sigpipe_utils::SignalHandler::Ignore);
+}
diff --git a/tests/ui/attributes/unix_sigpipe/unix_sigpipe-inherit.rs b/tests/ui/attributes/unix_sigpipe/unix_sigpipe-inherit.rs
index db3407a7d55..694fa460e9b 100644
--- a/tests/ui/attributes/unix_sigpipe/unix_sigpipe-inherit.rs
+++ b/tests/ui/attributes/unix_sigpipe/unix_sigpipe-inherit.rs
@@ -1,14 +1,29 @@
+//@ ignore-cross-compile because aux-bin does not yet support it
+//@ only-unix because SIGPIPE is a unix thing
+//@ aux-bin: assert-inherit-sig_dfl.rs
+//@ aux-bin: assert-inherit-sig_ign.rs
 //@ run-pass
-//@ aux-build:sigpipe-utils.rs
 
-#![feature(unix_sigpipe)]
+#![feature(rustc_private, unix_sigpipe)]
 
-#[unix_sigpipe = "inherit"]
+extern crate libc;
+
+// By default the Rust runtime resets SIGPIPE to SIG_DFL before exec:ing child
+// processes so opt-out of that with `#[unix_sigpipe = "sig_dfl"]`. See
+// https://github.com/rust-lang/rust/blob/bf4de3a874753bbee3323081c8b0c133444fed2d/library/std/src/sys/pal/unix/process/process_unix.rs#L359-L384
+#[unix_sigpipe = "sig_dfl"]
 fn main() {
-    extern crate sigpipe_utils;
+    // First expect SIG_DFL in a child process with #[unix_sigpipe = "inherit"].
+    assert_inherit_sigpipe_disposition("auxiliary/bin/assert-inherit-sig_dfl");
+
+    // With SIG_IGN we expect #[unix_sigpipe = "inherit"] to also get SIG_IGN.
+    unsafe {
+        libc::signal(libc::SIGPIPE, libc::SIG_IGN);
+    }
+    assert_inherit_sigpipe_disposition("auxiliary/bin/assert-inherit-sig_ign");
+}
 
-    // #[unix_sigpipe = "inherit"] is active, so SIGPIPE shall NOT be ignored,
-    // instead the default handler shall be installed. (We assume that the
-    // process that runs these tests have the default handler.)
-    sigpipe_utils::assert_sigpipe_handler(sigpipe_utils::SignalHandler::Default);
+fn assert_inherit_sigpipe_disposition(aux_bin: &str) {
+    let mut cmd = std::process::Command::new(aux_bin);
+    assert!(cmd.status().unwrap().success());
 }
diff --git a/tests/ui/auto-traits/typeck-auto-trait-no-supertraits-2.stderr b/tests/ui/auto-traits/typeck-auto-trait-no-supertraits-2.stderr
index dcf1c02bcee..4c1de72798c 100644
--- a/tests/ui/auto-traits/typeck-auto-trait-no-supertraits-2.stderr
+++ b/tests/ui/auto-traits/typeck-auto-trait-no-supertraits-2.stderr
@@ -23,6 +23,13 @@ LL | fn copy<T: Magic>(x: T) -> (T, T) { (x, x) }
    |                   |                  value moved here
    |                   move occurs because `x` has type `T`, which does not implement the `Copy` trait
    |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/typeck-auto-trait-no-supertraits-2.rs:8:9
+   |
+LL | fn copy<T: Magic>(x: T) -> (T, T) { (x, x) }
+   |         ^                            - you could clone this value
+   |         |
+   |         consider constraining this type parameter with `Clone`
 help: consider further restricting this bound
    |
 LL | fn copy<T: Magic + Copy>(x: T) -> (T, T) { (x, x) }
diff --git a/tests/ui/binop/binop-consume-args.stderr b/tests/ui/binop/binop-consume-args.stderr
index 6fbbb55437e..1b59216b3c7 100644
--- a/tests/ui/binop/binop-consume-args.stderr
+++ b/tests/ui/binop/binop-consume-args.stderr
@@ -8,6 +8,13 @@ LL |     lhs + rhs;
 LL |     drop(lhs);
    |          ^^^ value used here after move
    |
+help: if `A` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:5:8
+   |
+LL | fn add<A: Add<B, Output=()>, B>(lhs: A, rhs: B) {
+   |        ^ consider constraining this type parameter with `Clone`
+LL |     lhs + rhs;
+   |     --- you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/arith.rs:LL:COL
 help: consider further restricting this bound
@@ -26,6 +33,13 @@ LL |     drop(lhs);
 LL |     drop(rhs);
    |          ^^^ value used here after move
    |
+help: if `B` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:5:30
+   |
+LL | fn add<A: Add<B, Output=()>, B>(lhs: A, rhs: B) {
+   |                              ^ consider constraining this type parameter with `Clone`
+LL |     lhs + rhs;
+   |           --- you could clone this value
 help: consider restricting type parameter `B`
    |
 LL | fn add<A: Add<B, Output=()>, B: Copy>(lhs: A, rhs: B) {
@@ -41,6 +55,13 @@ LL |     lhs - rhs;
 LL |     drop(lhs);
    |          ^^^ value used here after move
    |
+help: if `A` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:11:8
+   |
+LL | fn sub<A: Sub<B, Output=()>, B>(lhs: A, rhs: B) {
+   |        ^ consider constraining this type parameter with `Clone`
+LL |     lhs - rhs;
+   |     --- you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/arith.rs:LL:COL
 help: consider further restricting this bound
@@ -59,6 +80,13 @@ LL |     drop(lhs);
 LL |     drop(rhs);
    |          ^^^ value used here after move
    |
+help: if `B` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:11:30
+   |
+LL | fn sub<A: Sub<B, Output=()>, B>(lhs: A, rhs: B) {
+   |                              ^ consider constraining this type parameter with `Clone`
+LL |     lhs - rhs;
+   |           --- you could clone this value
 help: consider restricting type parameter `B`
    |
 LL | fn sub<A: Sub<B, Output=()>, B: Copy>(lhs: A, rhs: B) {
@@ -74,6 +102,13 @@ LL |     lhs * rhs;
 LL |     drop(lhs);
    |          ^^^ value used here after move
    |
+help: if `A` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:17:8
+   |
+LL | fn mul<A: Mul<B, Output=()>, B>(lhs: A, rhs: B) {
+   |        ^ consider constraining this type parameter with `Clone`
+LL |     lhs * rhs;
+   |     --- you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/arith.rs:LL:COL
 help: consider further restricting this bound
@@ -92,6 +127,13 @@ LL |     drop(lhs);
 LL |     drop(rhs);
    |          ^^^ value used here after move
    |
+help: if `B` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:17:30
+   |
+LL | fn mul<A: Mul<B, Output=()>, B>(lhs: A, rhs: B) {
+   |                              ^ consider constraining this type parameter with `Clone`
+LL |     lhs * rhs;
+   |           --- you could clone this value
 help: consider restricting type parameter `B`
    |
 LL | fn mul<A: Mul<B, Output=()>, B: Copy>(lhs: A, rhs: B) {
@@ -107,6 +149,13 @@ LL |     lhs / rhs;
 LL |     drop(lhs);
    |          ^^^ value used here after move
    |
+help: if `A` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:23:8
+   |
+LL | fn div<A: Div<B, Output=()>, B>(lhs: A, rhs: B) {
+   |        ^ consider constraining this type parameter with `Clone`
+LL |     lhs / rhs;
+   |     --- you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/arith.rs:LL:COL
 help: consider further restricting this bound
@@ -125,6 +174,13 @@ LL |     drop(lhs);
 LL |     drop(rhs);
    |          ^^^ value used here after move
    |
+help: if `B` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:23:30
+   |
+LL | fn div<A: Div<B, Output=()>, B>(lhs: A, rhs: B) {
+   |                              ^ consider constraining this type parameter with `Clone`
+LL |     lhs / rhs;
+   |           --- you could clone this value
 help: consider restricting type parameter `B`
    |
 LL | fn div<A: Div<B, Output=()>, B: Copy>(lhs: A, rhs: B) {
@@ -140,6 +196,13 @@ LL |     lhs % rhs;
 LL |     drop(lhs);
    |          ^^^ value used here after move
    |
+help: if `A` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:29:8
+   |
+LL | fn rem<A: Rem<B, Output=()>, B>(lhs: A, rhs: B) {
+   |        ^ consider constraining this type parameter with `Clone`
+LL |     lhs % rhs;
+   |     --- you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/arith.rs:LL:COL
 help: consider further restricting this bound
@@ -158,6 +221,13 @@ LL |     drop(lhs);
 LL |     drop(rhs);
    |          ^^^ value used here after move
    |
+help: if `B` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:29:30
+   |
+LL | fn rem<A: Rem<B, Output=()>, B>(lhs: A, rhs: B) {
+   |                              ^ consider constraining this type parameter with `Clone`
+LL |     lhs % rhs;
+   |           --- you could clone this value
 help: consider restricting type parameter `B`
    |
 LL | fn rem<A: Rem<B, Output=()>, B: Copy>(lhs: A, rhs: B) {
@@ -173,6 +243,13 @@ LL |     lhs & rhs;
 LL |     drop(lhs);
    |          ^^^ value used here after move
    |
+help: if `A` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:35:11
+   |
+LL | fn bitand<A: BitAnd<B, Output=()>, B>(lhs: A, rhs: B) {
+   |           ^ consider constraining this type parameter with `Clone`
+LL |     lhs & rhs;
+   |     --- you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/bit.rs:LL:COL
 help: consider further restricting this bound
@@ -191,6 +268,13 @@ LL |     drop(lhs);
 LL |     drop(rhs);
    |          ^^^ value used here after move
    |
+help: if `B` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:35:36
+   |
+LL | fn bitand<A: BitAnd<B, Output=()>, B>(lhs: A, rhs: B) {
+   |                                    ^ consider constraining this type parameter with `Clone`
+LL |     lhs & rhs;
+   |           --- you could clone this value
 help: consider restricting type parameter `B`
    |
 LL | fn bitand<A: BitAnd<B, Output=()>, B: Copy>(lhs: A, rhs: B) {
@@ -206,6 +290,13 @@ LL |     lhs | rhs;
 LL |     drop(lhs);
    |          ^^^ value used here after move
    |
+help: if `A` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:41:10
+   |
+LL | fn bitor<A: BitOr<B, Output=()>, B>(lhs: A, rhs: B) {
+   |          ^ consider constraining this type parameter with `Clone`
+LL |     lhs | rhs;
+   |     --- you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/bit.rs:LL:COL
 help: consider further restricting this bound
@@ -224,6 +315,13 @@ LL |     drop(lhs);
 LL |     drop(rhs);
    |          ^^^ value used here after move
    |
+help: if `B` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:41:34
+   |
+LL | fn bitor<A: BitOr<B, Output=()>, B>(lhs: A, rhs: B) {
+   |                                  ^ consider constraining this type parameter with `Clone`
+LL |     lhs | rhs;
+   |           --- you could clone this value
 help: consider restricting type parameter `B`
    |
 LL | fn bitor<A: BitOr<B, Output=()>, B: Copy>(lhs: A, rhs: B) {
@@ -239,6 +337,13 @@ LL |     lhs ^ rhs;
 LL |     drop(lhs);
    |          ^^^ value used here after move
    |
+help: if `A` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:47:11
+   |
+LL | fn bitxor<A: BitXor<B, Output=()>, B>(lhs: A, rhs: B) {
+   |           ^ consider constraining this type parameter with `Clone`
+LL |     lhs ^ rhs;
+   |     --- you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/bit.rs:LL:COL
 help: consider further restricting this bound
@@ -257,6 +362,13 @@ LL |     drop(lhs);
 LL |     drop(rhs);
    |          ^^^ value used here after move
    |
+help: if `B` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:47:36
+   |
+LL | fn bitxor<A: BitXor<B, Output=()>, B>(lhs: A, rhs: B) {
+   |                                    ^ consider constraining this type parameter with `Clone`
+LL |     lhs ^ rhs;
+   |           --- you could clone this value
 help: consider restricting type parameter `B`
    |
 LL | fn bitxor<A: BitXor<B, Output=()>, B: Copy>(lhs: A, rhs: B) {
@@ -272,6 +384,13 @@ LL |     lhs << rhs;
 LL |     drop(lhs);
    |          ^^^ value used here after move
    |
+help: if `A` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:53:8
+   |
+LL | fn shl<A: Shl<B, Output=()>, B>(lhs: A, rhs: B) {
+   |        ^ consider constraining this type parameter with `Clone`
+LL |     lhs << rhs;
+   |     --- you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/bit.rs:LL:COL
 help: consider further restricting this bound
@@ -290,6 +409,13 @@ LL |     drop(lhs);
 LL |     drop(rhs);
    |          ^^^ value used here after move
    |
+help: if `B` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:53:30
+   |
+LL | fn shl<A: Shl<B, Output=()>, B>(lhs: A, rhs: B) {
+   |                              ^ consider constraining this type parameter with `Clone`
+LL |     lhs << rhs;
+   |            --- you could clone this value
 help: consider restricting type parameter `B`
    |
 LL | fn shl<A: Shl<B, Output=()>, B: Copy>(lhs: A, rhs: B) {
@@ -305,6 +431,13 @@ LL |     lhs >> rhs;
 LL |     drop(lhs);
    |          ^^^ value used here after move
    |
+help: if `A` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:59:8
+   |
+LL | fn shr<A: Shr<B, Output=()>, B>(lhs: A, rhs: B) {
+   |        ^ consider constraining this type parameter with `Clone`
+LL |     lhs >> rhs;
+   |     --- you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/bit.rs:LL:COL
 help: consider further restricting this bound
@@ -323,6 +456,13 @@ LL |     drop(lhs);
 LL |     drop(rhs);
    |          ^^^ value used here after move
    |
+help: if `B` implemented `Clone`, you could clone the value
+  --> $DIR/binop-consume-args.rs:59:30
+   |
+LL | fn shr<A: Shr<B, Output=()>, B>(lhs: A, rhs: B) {
+   |                              ^ consider constraining this type parameter with `Clone`
+LL |     lhs >> rhs;
+   |            --- you could clone this value
 help: consider restricting type parameter `B`
    |
 LL | fn shr<A: Shr<B, Output=()>, B: Copy>(lhs: A, rhs: B) {
diff --git a/tests/ui/binop/binop-move-semantics.stderr b/tests/ui/binop/binop-move-semantics.stderr
index 1dd8c9a87d4..83c27590e90 100644
--- a/tests/ui/binop/binop-move-semantics.stderr
+++ b/tests/ui/binop/binop-move-semantics.stderr
@@ -11,6 +11,13 @@ LL | |     x;
    | |_____value used here after move
    |       `x` moved due to usage in operator
    |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/binop-move-semantics.rs:5:16
+   |
+LL | fn double_move<T: Add<Output=()>>(x: T) {
+   |                ^ consider constraining this type parameter with `Clone`
+LL |     x
+   |     - you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/arith.rs:LL:COL
 help: consider further restricting this bound
@@ -51,6 +58,14 @@ LL |     x
 ...
 LL |     use_mut(n); use_imm(m);
    |                         - borrow later used here
+   |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/binop-move-semantics.rs:17:18
+   |
+LL | fn move_borrowed<T: Add<Output=()>>(x: T, mut y: T) {
+   |                  ^ consider constraining this type parameter with `Clone`
+LL |     let m = &x;
+   |             -- you could clone this value
 
 error[E0505]: cannot move out of `y` because it is borrowed
   --> $DIR/binop-move-semantics.rs:23:5
@@ -65,6 +80,15 @@ LL |     y;
    |     ^ move out of `y` occurs here
 LL |     use_mut(n); use_imm(m);
    |             - borrow later used here
+   |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/binop-move-semantics.rs:17:18
+   |
+LL | fn move_borrowed<T: Add<Output=()>>(x: T, mut y: T) {
+   |                  ^ consider constraining this type parameter with `Clone`
+LL |     let m = &x;
+LL |     let n = &mut y;
+   |             ------ you could clone this value
 
 error[E0507]: cannot move out of `*m` which is behind a mutable reference
   --> $DIR/binop-move-semantics.rs:30:5
@@ -80,12 +104,29 @@ LL | |     *n;
    |
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/arith.rs:LL:COL
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/binop-move-semantics.rs:26:24
+   |
+LL | fn illegal_dereference<T: Add<Output=()>>(mut x: T, y: T) {
+   |                        ^ consider constraining this type parameter with `Clone`
+...
+LL |     *m
+   |     -- you could clone this value
 
 error[E0507]: cannot move out of `*n` which is behind a shared reference
   --> $DIR/binop-move-semantics.rs:32:5
    |
 LL |     *n;
    |     ^^ move occurs because `*n` has type `T`, which does not implement the `Copy` trait
+   |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/binop-move-semantics.rs:26:24
+   |
+LL | fn illegal_dereference<T: Add<Output=()>>(mut x: T, y: T) {
+   |                        ^ consider constraining this type parameter with `Clone`
+...
+LL |     *n;
+   |     -- you could clone this value
 
 error[E0502]: cannot borrow `f` as immutable because it is also borrowed as mutable
   --> $DIR/binop-move-semantics.rs:54:5
diff --git a/tests/ui/borrowck/borrowck-move-by-capture.stderr b/tests/ui/borrowck/borrowck-move-by-capture.stderr
index 01647011207..9915acfe065 100644
--- a/tests/ui/borrowck/borrowck-move-by-capture.stderr
+++ b/tests/ui/borrowck/borrowck-move-by-capture.stderr
@@ -11,6 +11,12 @@ LL |         let _h = to_fn_once(move || -> isize { *bar });
    |                             |                  variable moved due to use in closure
    |                             |                  move occurs because `bar` has type `Box<isize>`, which does not implement the `Copy` trait
    |                             `bar` is moved here
+   |
+help: clone the value before moving it into the closure
+   |
+LL ~         let value = bar.clone();
+LL ~         let _h = to_fn_once(move || -> isize { value });
+   |
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/borrowck/borrowck-move-out-of-static-item.stderr b/tests/ui/borrowck/borrowck-move-out-of-static-item.stderr
index 86bddacbdc7..b4b60d40d91 100644
--- a/tests/ui/borrowck/borrowck-move-out-of-static-item.stderr
+++ b/tests/ui/borrowck/borrowck-move-out-of-static-item.stderr
@@ -8,7 +8,10 @@ note: if `Foo` implemented `Clone`, you could clone the value
   --> $DIR/borrowck-move-out-of-static-item.rs:3:1
    |
 LL | struct Foo {
-   | ^^^^^^^^^^
+   | ^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     test(BAR);
+   |          --- you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/borrowck/borrowck-move-subcomponent.stderr b/tests/ui/borrowck/borrowck-move-subcomponent.stderr
index 4d9477f8581..cc6c3bdeb10 100644
--- a/tests/ui/borrowck/borrowck-move-subcomponent.stderr
+++ b/tests/ui/borrowck/borrowck-move-subcomponent.stderr
@@ -14,7 +14,10 @@ note: if `S` implemented `Clone`, you could clone the value
   --> $DIR/borrowck-move-subcomponent.rs:6:1
    |
 LL | struct S {
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |   let pb = &a;
+   |            -- you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/borrowck/borrowck-overloaded-call.stderr b/tests/ui/borrowck/borrowck-overloaded-call.stderr
index 1602058c183..c3b7b0b6080 100644
--- a/tests/ui/borrowck/borrowck-overloaded-call.stderr
+++ b/tests/ui/borrowck/borrowck-overloaded-call.stderr
@@ -34,7 +34,10 @@ note: if `SFnOnce` implemented `Clone`, you could clone the value
   --> $DIR/borrowck-overloaded-call.rs:41:1
    |
 LL | struct SFnOnce {
-   | ^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     s(" world".to_string());
+   |     - you could clone this value
 
 error: aborting due to 3 previous errors
 
diff --git a/tests/ui/borrowck/clone-on-ref.stderr b/tests/ui/borrowck/clone-on-ref.stderr
index f0eaf4bac7d..19f040556f8 100644
--- a/tests/ui/borrowck/clone-on-ref.stderr
+++ b/tests/ui/borrowck/clone-on-ref.stderr
@@ -32,6 +32,13 @@ LL |
 LL |     println!("{b}");
    |               --- borrow later used here
    |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/clone-on-ref.rs:11:8
+   |
+LL | fn bar<T: std::fmt::Display>(x: T) {
+   |        ^ consider constraining this type parameter with `Clone`
+LL |     let a = &x;
+   |             -- you could clone this value
 help: consider further restricting this bound
    |
 LL | fn bar<T: std::fmt::Display + Clone>(x: T) {
@@ -56,7 +63,10 @@ note: if `A` implemented `Clone`, you could clone the value
   --> $DIR/clone-on-ref.rs:19:1
    |
 LL | struct A;
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+LL | fn qux(x: A) {
+LL |     let a = &x;
+   |             -- you could clone this value
 help: consider annotating `A` with `#[derive(Clone)]`
    |
 LL + #[derive(Clone)]
diff --git a/tests/ui/borrowck/issue-101119.stderr b/tests/ui/borrowck/issue-101119.stderr
index b4775496f4f..a894fa63ace 100644
--- a/tests/ui/borrowck/issue-101119.stderr
+++ b/tests/ui/borrowck/issue-101119.stderr
@@ -22,7 +22,10 @@ note: if `State` implemented `Clone`, you could clone the value
   --> $DIR/issue-101119.rs:1:1
    |
 LL | struct State;
-   | ^^^^^^^^^^^^
+   | ^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |             fill_segment(state);
+   |                          ----- you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/borrowck/issue-103624.stderr b/tests/ui/borrowck/issue-103624.stderr
index 94421c35c65..603055beadc 100644
--- a/tests/ui/borrowck/issue-103624.stderr
+++ b/tests/ui/borrowck/issue-103624.stderr
@@ -13,8 +13,11 @@ LL |             self.b;
 note: if `StructB` implemented `Clone`, you could clone the value
   --> $DIR/issue-103624.rs:23:1
    |
+LL |             self.b;
+   |             ------ you could clone this value
+...
 LL | struct StructB {}
-   | ^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
 
 error[E0521]: borrowed data escapes outside of method
   --> $DIR/issue-103624.rs:14:9
diff --git a/tests/ui/borrowck/issue-119915-bad-clone-suggestion.stderr b/tests/ui/borrowck/issue-119915-bad-clone-suggestion.stderr
index 701f00d079d..dde17d1f652 100644
--- a/tests/ui/borrowck/issue-119915-bad-clone-suggestion.stderr
+++ b/tests/ui/borrowck/issue-119915-bad-clone-suggestion.stderr
@@ -15,7 +15,10 @@ note: if `Example<E, NoLifetime>` implemented `Clone`, you could clone the value
   --> $DIR/issue-119915-bad-clone-suggestion.rs:3:1
    |
 LL | struct Example<E, FakeParam>(PhantomData<(fn(E), fn(FakeParam))>);
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         unsafe { self.change() }
+   |                  ---- you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/borrowck/issue-17718-static-move.stderr b/tests/ui/borrowck/issue-17718-static-move.stderr
index e2c3a9d5a26..057ac6d7e3d 100644
--- a/tests/ui/borrowck/issue-17718-static-move.stderr
+++ b/tests/ui/borrowck/issue-17718-static-move.stderr
@@ -8,7 +8,10 @@ note: if `Foo` implemented `Clone`, you could clone the value
   --> $DIR/issue-17718-static-move.rs:1:1
    |
 LL | struct Foo;
-   | ^^^^^^^^^^
+   | ^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let _a = FOO;
+   |              --- you could clone this value
 help: consider borrowing here
    |
 LL |     let _a = &FOO;
diff --git a/tests/ui/borrowck/issue-20801.stderr b/tests/ui/borrowck/issue-20801.stderr
index 1da6f0bef02..20a4bd4e423 100644
--- a/tests/ui/borrowck/issue-20801.stderr
+++ b/tests/ui/borrowck/issue-20801.stderr
@@ -23,7 +23,10 @@ note: if `T` implemented `Clone`, you could clone the value
   --> $DIR/issue-20801.rs:3:1
    |
 LL | struct T(u8);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let a = unsafe { *mut_ref() };
+   |                      ---------- you could clone this value
 help: consider removing the dereference here
    |
 LL -     let a = unsafe { *mut_ref() };
@@ -40,7 +43,10 @@ note: if `T` implemented `Clone`, you could clone the value
   --> $DIR/issue-20801.rs:3:1
    |
 LL | struct T(u8);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let b = unsafe { *imm_ref() };
+   |                      ---------- you could clone this value
 help: consider removing the dereference here
    |
 LL -     let b = unsafe { *imm_ref() };
@@ -57,7 +63,10 @@ note: if `T` implemented `Clone`, you could clone the value
   --> $DIR/issue-20801.rs:3:1
    |
 LL | struct T(u8);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let c = unsafe { *mut_ptr() };
+   |                      ---------- you could clone this value
 help: consider removing the dereference here
    |
 LL -     let c = unsafe { *mut_ptr() };
@@ -74,7 +83,10 @@ note: if `T` implemented `Clone`, you could clone the value
   --> $DIR/issue-20801.rs:3:1
    |
 LL | struct T(u8);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let d = unsafe { *const_ptr() };
+   |                      ------------ you could clone this value
 help: consider removing the dereference here
    |
 LL -     let d = unsafe { *const_ptr() };
diff --git a/tests/ui/borrowck/move-error-in-promoted-2.stderr b/tests/ui/borrowck/move-error-in-promoted-2.stderr
index 43f4e820857..1e9b1d5209c 100644
--- a/tests/ui/borrowck/move-error-in-promoted-2.stderr
+++ b/tests/ui/borrowck/move-error-in-promoted-2.stderr
@@ -11,7 +11,10 @@ note: if `S` implemented `Clone`, you could clone the value
   --> $DIR/move-error-in-promoted-2.rs:3:1
    |
 LL | struct S;
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     &([S][0],);
+   |       ------ you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/borrowck/move-error-snippets.stderr b/tests/ui/borrowck/move-error-snippets.stderr
index 40b64398aef..97d14051518 100644
--- a/tests/ui/borrowck/move-error-snippets.stderr
+++ b/tests/ui/borrowck/move-error-snippets.stderr
@@ -13,7 +13,12 @@ note: if `A` implemented `Clone`, you could clone the value
   --> $DIR/move-error-snippets.rs:9:1
    |
 LL | struct A;
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+   |
+  ::: $DIR/move-error-snippets-ext.rs:5:17
+   |
+LL |         let a = $c;
+   |                 -- you could clone this value
    = note: this error originates in the macro `aaa` which comes from the expansion of the macro `sss` (in Nightly builds, run with -Z macro-backtrace for more info)
 help: consider borrowing here
    |
diff --git a/tests/ui/borrowck/move-in-static-initializer-issue-38520.stderr b/tests/ui/borrowck/move-in-static-initializer-issue-38520.stderr
index a4e70b50646..009e85a8031 100644
--- a/tests/ui/borrowck/move-in-static-initializer-issue-38520.stderr
+++ b/tests/ui/borrowck/move-in-static-initializer-issue-38520.stderr
@@ -8,7 +8,10 @@ note: if `Foo` implemented `Clone`, you could clone the value
   --> $DIR/move-in-static-initializer-issue-38520.rs:5:1
    |
 LL | struct Foo(usize);
-   | ^^^^^^^^^^
+   | ^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL | static Y: usize = get(*&X);
+   |                       --- you could clone this value
 
 error[E0507]: cannot move out of a shared reference
   --> $DIR/move-in-static-initializer-issue-38520.rs:13:22
@@ -20,7 +23,10 @@ note: if `Foo` implemented `Clone`, you could clone the value
   --> $DIR/move-in-static-initializer-issue-38520.rs:5:1
    |
 LL | struct Foo(usize);
-   | ^^^^^^^^^^
+   | ^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL | const Z: usize = get(*&X);
+   |                      --- you could clone this value
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/box/leak-alloc.stderr b/tests/ui/box/leak-alloc.stderr
index 53ff5f0107d..bdaa9449f91 100644
--- a/tests/ui/box/leak-alloc.stderr
+++ b/tests/ui/box/leak-alloc.stderr
@@ -16,7 +16,10 @@ note: if `Alloc` implemented `Clone`, you could clone the value
   --> $DIR/leak-alloc.rs:8:1
    |
 LL | struct Alloc {}
-   | ^^^^^^^^^^^^
+   | ^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let boxed = Box::new_in(10, alloc.by_ref());
+   |                                 ----- you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/coherence/coherence-with-coroutine.rs b/tests/ui/coherence/coherence-with-coroutine.rs
index 1ba98344672..6b0617e950b 100644
--- a/tests/ui/coherence/coherence-with-coroutine.rs
+++ b/tests/ui/coherence/coherence-with-coroutine.rs
@@ -8,6 +8,7 @@
 
 type OpaqueCoroutine = impl Sized;
 fn defining_use() -> OpaqueCoroutine {
+    #[coroutine]
     || {
         for i in 0..10 {
             yield i;
diff --git a/tests/ui/coherence/coherence-with-coroutine.stock.stderr b/tests/ui/coherence/coherence-with-coroutine.stock.stderr
index 9cf20ea4936..5f58b3088f1 100644
--- a/tests/ui/coherence/coherence-with-coroutine.stock.stderr
+++ b/tests/ui/coherence/coherence-with-coroutine.stock.stderr
@@ -1,5 +1,5 @@
 error[E0119]: conflicting implementations of trait `Trait` for type `Wrapper<OpaqueCoroutine>`
-  --> $DIR/coherence-with-coroutine.rs:21:1
+  --> $DIR/coherence-with-coroutine.rs:22:1
    |
 LL | impl Trait for Wrapper<OpaqueCoroutine> {}
    | --------------------------------------- first implementation here
diff --git a/tests/ui/const-generics/generic_const_exprs/const-block-is-poly.rs b/tests/ui/const-generics/generic_const_exprs/const-block-is-poly.rs
index 7332a8f03c0..f1305202ad4 100644
--- a/tests/ui/const-generics/generic_const_exprs/const-block-is-poly.rs
+++ b/tests/ui/const-generics/generic_const_exprs/const-block-is-poly.rs
@@ -1,4 +1,4 @@
-#![feature(inline_const, generic_const_exprs)]
+#![feature(generic_const_exprs)]
 //~^ WARN the feature `generic_const_exprs` is incomplete
 
 fn foo<T>() {
diff --git a/tests/ui/const-generics/generic_const_exprs/const-block-is-poly.stderr b/tests/ui/const-generics/generic_const_exprs/const-block-is-poly.stderr
index a85e0cbcf7e..03b0004bf0b 100644
--- a/tests/ui/const-generics/generic_const_exprs/const-block-is-poly.stderr
+++ b/tests/ui/const-generics/generic_const_exprs/const-block-is-poly.stderr
@@ -1,8 +1,8 @@
 warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
-  --> $DIR/const-block-is-poly.rs:1:26
+  --> $DIR/const-block-is-poly.rs:1:12
    |
-LL | #![feature(inline_const, generic_const_exprs)]
-   |                          ^^^^^^^^^^^^^^^^^^^
+LL | #![feature(generic_const_exprs)]
+   |            ^^^^^^^^^^^^^^^^^^^
    |
    = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
    = note: `#[warn(incomplete_features)]` on by default
diff --git a/tests/ui/const-generics/generic_const_exprs/const_kind_expr/relate_ty_with_infer_2.rs b/tests/ui/const-generics/generic_const_exprs/const_kind_expr/relate_ty_with_infer_2.rs
index 4333ec9f552..f9cf8210d65 100644
--- a/tests/ui/const-generics/generic_const_exprs/const_kind_expr/relate_ty_with_infer_2.rs
+++ b/tests/ui/const-generics/generic_const_exprs/const_kind_expr/relate_ty_with_infer_2.rs
@@ -1,5 +1,5 @@
 //@ check-pass
-#![feature(inline_const, generic_const_exprs)]
+#![feature(generic_const_exprs)]
 #![allow(incomplete_features)]
 use std::marker::PhantomData;
 
diff --git a/tests/ui/const-generics/generic_const_exprs/inline-const-in-const-generic-defaults.rs b/tests/ui/const-generics/generic_const_exprs/inline-const-in-const-generic-defaults.rs
index 3bc02f4c6bb..073e0fe0a7f 100644
--- a/tests/ui/const-generics/generic_const_exprs/inline-const-in-const-generic-defaults.rs
+++ b/tests/ui/const-generics/generic_const_exprs/inline-const-in-const-generic-defaults.rs
@@ -1,7 +1,6 @@
 //@ check-pass
 
 #![feature(generic_const_exprs)]
-#![feature(inline_const)]
 #![allow(incomplete_features)]
 
 pub struct ConstDefaultUnstable<const N: usize = { const { 3 } }>;
diff --git a/tests/ui/const_prop/dont-propagate-generic-instance-2.rs b/tests/ui/const_prop/dont-propagate-generic-instance-2.rs
index 768c9b3171a..08064bc6589 100644
--- a/tests/ui/const_prop/dont-propagate-generic-instance-2.rs
+++ b/tests/ui/const_prop/dont-propagate-generic-instance-2.rs
@@ -1,7 +1,5 @@
 //@ run-pass
 
-#![feature(inline_const)]
-
 // Makes sure we don't propagate generic instances of `Self: ?Sized` blanket impls.
 // This is relevant when we have an overlapping impl and builtin dyn instance.
 // See <https://github.com/rust-lang/rust/pull/114941> for more context.
diff --git a/tests/ui/consts/closure-structural-match-issue-90013.rs b/tests/ui/consts/closure-structural-match-issue-90013.rs
index 7a5d9b69ee4..454341a7784 100644
--- a/tests/ui/consts/closure-structural-match-issue-90013.rs
+++ b/tests/ui/consts/closure-structural-match-issue-90013.rs
@@ -1,6 +1,5 @@
 // Regression test for issue 90013.
 //@ check-pass
-#![feature(inline_const)]
 
 fn main() {
     const { || {} };
diff --git a/tests/ui/consts/const-block-const-bound.rs b/tests/ui/consts/const-block-const-bound.rs
index b0d5e19ad55..933eb6cfc0a 100644
--- a/tests/ui/consts/const-block-const-bound.rs
+++ b/tests/ui/consts/const-block-const-bound.rs
@@ -1,7 +1,7 @@
 //@ known-bug: #103507
 
 #![allow(unused)]
-#![feature(const_trait_impl, inline_const, negative_impls)]
+#![feature(const_trait_impl, negative_impls)]
 
 use std::marker::Destruct;
 
diff --git a/tests/ui/consts/const-blocks/fn-call-in-const.rs b/tests/ui/consts/const-blocks/fn-call-in-const.rs
index 9bf267b7de9..a3e24ddae7d 100644
--- a/tests/ui/consts/const-blocks/fn-call-in-const.rs
+++ b/tests/ui/consts/const-blocks/fn-call-in-const.rs
@@ -1,6 +1,5 @@
 //@ run-pass
 
-#![feature(inline_const)]
 #![allow(unused)]
 
 // Some type that is not copyable.
diff --git a/tests/ui/consts/const-eval/heap/alloc_intrinsic_zero_sized.rs b/tests/ui/consts/const-eval/heap/alloc_intrinsic_zero_sized.rs
index 6c4fca35626..2517560c2c3 100644
--- a/tests/ui/consts/const-eval/heap/alloc_intrinsic_zero_sized.rs
+++ b/tests/ui/consts/const-eval/heap/alloc_intrinsic_zero_sized.rs
@@ -1,7 +1,6 @@
 //@ run-pass
 #![feature(core_intrinsics)]
 #![feature(const_heap)]
-#![feature(inline_const)]
 
 use std::intrinsics;
 
diff --git a/tests/ui/consts/const-eval/heap/dealloc_intrinsic_zero_sized.rs b/tests/ui/consts/const-eval/heap/dealloc_intrinsic_zero_sized.rs
index 146a87862e8..c53bb36f4a2 100644
--- a/tests/ui/consts/const-eval/heap/dealloc_intrinsic_zero_sized.rs
+++ b/tests/ui/consts/const-eval/heap/dealloc_intrinsic_zero_sized.rs
@@ -1,7 +1,6 @@
 //@ run-pass
 #![feature(core_intrinsics)]
 #![feature(const_heap)]
-#![feature(inline_const)]
 
 use std::intrinsics;
 
diff --git a/tests/ui/consts/issue-102117.rs b/tests/ui/consts/issue-102117.rs
index 3ed90aed235..6cb9832bcd8 100644
--- a/tests/ui/consts/issue-102117.rs
+++ b/tests/ui/consts/issue-102117.rs
@@ -1,4 +1,4 @@
-#![feature(inline_const, const_type_id)]
+#![feature(const_type_id)]
 
 use std::alloc::Layout;
 use std::any::TypeId;
diff --git a/tests/ui/coroutine/addassign-yield.rs b/tests/ui/coroutine/addassign-yield.rs
index 8718e73512f..8329b53d715 100644
--- a/tests/ui/coroutine/addassign-yield.rs
+++ b/tests/ui/coroutine/addassign-yield.rs
@@ -5,21 +5,21 @@
 // is being used), we were failing to account for all types that might
 // possibly be live across a yield point.
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 fn foo() {
-    let _x = static || {
+    let _x = #[coroutine] static || {
         let mut s = String::new();
         s += { yield; "" };
     };
 
-    let _y = static || {
+    let _y = #[coroutine] static || {
         let x = &mut 0;
         *{ yield; x } += match String::new() { _ => 0 };
     };
 
     // Please don't ever actually write something like this
-    let _z = static || {
+    let _z = #[coroutine] static || {
         let x = &mut 0;
         *{
             let inner = &mut 1;
diff --git a/tests/ui/coroutine/auto-trait-regions.rs b/tests/ui/coroutine/auto-trait-regions.rs
index 5fce70e8e54..4c239f9ee76 100644
--- a/tests/ui/coroutine/auto-trait-regions.rs
+++ b/tests/ui/coroutine/auto-trait-regions.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![feature(auto_traits)]
 #![feature(negative_impls)]
 
@@ -23,7 +23,7 @@ fn assert_foo<T: Foo>(f: T) {}
 fn main() {
     // Make sure 'static is erased for coroutine interiors so we can't match it in trait selection
     let x: &'static _ = &OnlyFooIfStaticRef(No);
-    let gen = move || {
+    let gen = #[coroutine] move || {
         let x = x;
         yield;
         assert_foo(x);
@@ -33,7 +33,7 @@ fn main() {
 
     // Allow impls which matches any lifetime
     let x = &OnlyFooIfRef(No);
-    let gen = move || {
+    let gen = #[coroutine] move || {
         let x = x;
         yield;
         assert_foo(x);
@@ -41,7 +41,7 @@ fn main() {
     assert_foo(gen); // ok
 
     // Disallow impls which relates lifetimes in the coroutine interior
-    let gen = move || {
+    let gen = #[coroutine] move || {
         let a = A(&mut true, &mut true, No);
         //~^ temporary value dropped while borrowed
         //~| temporary value dropped while borrowed
diff --git a/tests/ui/coroutine/auxiliary/metadata-sufficient-for-layout.rs b/tests/ui/coroutine/auxiliary/metadata-sufficient-for-layout.rs
index 8af6973134a..8ecb8c0c097 100644
--- a/tests/ui/coroutine/auxiliary/metadata-sufficient-for-layout.rs
+++ b/tests/ui/coroutine/auxiliary/metadata-sufficient-for-layout.rs
@@ -5,6 +5,7 @@ use std::marker::Unpin;
 use std::ops::Coroutine;
 
 pub fn g() -> impl Coroutine<(), Yield = (), Return = ()> {
+    #[coroutine]
     || {
         yield;
     }
diff --git a/tests/ui/coroutine/auxiliary/unwind-aux.rs b/tests/ui/coroutine/auxiliary/unwind-aux.rs
index ff1e8ed32cd..5d5e5c2218d 100644
--- a/tests/ui/coroutine/auxiliary/unwind-aux.rs
+++ b/tests/ui/coroutine/auxiliary/unwind-aux.rs
@@ -2,9 +2,10 @@
 //@ no-prefer-dynamic
 //@ edition:2021
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 pub fn run<T>(a: T) {
-    let _ = move || {
+    let _ = #[coroutine]
+    move || {
         drop(a);
         yield;
     };
diff --git a/tests/ui/coroutine/auxiliary/xcrate-reachable.rs b/tests/ui/coroutine/auxiliary/xcrate-reachable.rs
index 673153f0619..0b5d1882300 100644
--- a/tests/ui/coroutine/auxiliary/xcrate-reachable.rs
+++ b/tests/ui/coroutine/auxiliary/xcrate-reachable.rs
@@ -7,6 +7,7 @@ fn msg() -> u32 {
 }
 
 pub fn foo() -> impl Coroutine<(), Yield = (), Return = u32> {
+    #[coroutine]
     || {
         yield;
         return msg();
diff --git a/tests/ui/coroutine/auxiliary/xcrate.rs b/tests/ui/coroutine/auxiliary/xcrate.rs
index f749a95ad35..52f188135bd 100644
--- a/tests/ui/coroutine/auxiliary/xcrate.rs
+++ b/tests/ui/coroutine/auxiliary/xcrate.rs
@@ -1,9 +1,10 @@
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::marker::Unpin;
 use std::ops::Coroutine;
 
 pub fn foo() -> impl Coroutine<(), Yield = (), Return = ()> {
+    #[coroutine]
     || {
         if false {
             yield;
@@ -12,7 +13,10 @@ pub fn foo() -> impl Coroutine<(), Yield = (), Return = ()> {
 }
 
 pub fn bar<T: 'static>(t: T) -> Box<Coroutine<(), Yield = T, Return = ()> + Unpin> {
-    Box::new(|| {
-        yield t;
-    })
+    Box::new(
+        #[coroutine]
+        || {
+            yield t;
+        },
+    )
 }
diff --git a/tests/ui/coroutine/borrow-in-tail-expr.rs b/tests/ui/coroutine/borrow-in-tail-expr.rs
index 2f0aa62019e..380e95cfc77 100644
--- a/tests/ui/coroutine/borrow-in-tail-expr.rs
+++ b/tests/ui/coroutine/borrow-in-tail-expr.rs
@@ -1,9 +1,9 @@
 //@ run-pass
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 fn main() {
-    let _a = || {
+    let _a = #[coroutine] || {
         yield;
         let a = String::new();
         a.len()
diff --git a/tests/ui/coroutine/borrowing.rs b/tests/ui/coroutine/borrowing.rs
index 778eed8bd0d..a6628766c1b 100644
--- a/tests/ui/coroutine/borrowing.rs
+++ b/tests/ui/coroutine/borrowing.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 use std::pin::Pin;
@@ -6,13 +6,13 @@ use std::pin::Pin;
 fn main() {
     let _b = {
         let a = 3;
-        Pin::new(&mut || yield &a).resume(())
+        Pin::new(&mut #[coroutine] || yield &a).resume(())
         //~^ ERROR: `a` does not live long enough
     };
 
     let _b = {
         let a = 3;
-        || {
+        #[coroutine] || {
             yield &a
             //~^ ERROR: `a` does not live long enough
         }
diff --git a/tests/ui/coroutine/borrowing.stderr b/tests/ui/coroutine/borrowing.stderr
index acd4cdafdfd..4f8b9737777 100644
--- a/tests/ui/coroutine/borrowing.stderr
+++ b/tests/ui/coroutine/borrowing.stderr
@@ -1,13 +1,14 @@
 error[E0597]: `a` does not live long enough
-  --> $DIR/borrowing.rs:9:33
+  --> $DIR/borrowing.rs:9:46
    |
 LL |     let _b = {
    |         -- borrow later stored here
 LL |         let a = 3;
-LL |         Pin::new(&mut || yield &a).resume(())
-   |                       --        ^ borrowed value does not live long enough
-   |                       |
-   |                       value captured here by coroutine
+   |             - binding `a` declared here
+LL |         Pin::new(&mut #[coroutine] || yield &a).resume(())
+   |                                    --        ^ borrowed value does not live long enough
+   |                                    |
+   |                                    value captured here by coroutine
 LL |
 LL |     };
    |     - `a` dropped here while still borrowed
@@ -18,8 +19,9 @@ error[E0597]: `a` does not live long enough
 LL |     let _b = {
    |         -- borrow later stored here
 LL |         let a = 3;
-LL |         || {
-   |         -- value captured here by coroutine
+   |             - binding `a` declared here
+LL |         #[coroutine] || {
+   |                      -- value captured here by coroutine
 LL |             yield &a
    |                    ^ borrowed value does not live long enough
 ...
diff --git a/tests/ui/coroutine/check-resume-ty-lifetimes-2.rs b/tests/ui/coroutine/check-resume-ty-lifetimes-2.rs
index a316c50e867..327756ebe66 100644
--- a/tests/ui/coroutine/check-resume-ty-lifetimes-2.rs
+++ b/tests/ui/coroutine/check-resume-ty-lifetimes-2.rs
@@ -7,27 +7,27 @@ struct Contravariant<'a>(fn(&'a ()));
 struct Covariant<'a>(fn() -> &'a ());
 
 fn bad1<'short, 'long: 'short>() -> impl Coroutine<Covariant<'short>> {
-    |_: Covariant<'short>| {
+    #[coroutine] |_: Covariant<'short>| {
         let a: Covariant<'long> = yield ();
         //~^ ERROR lifetime may not live long enough
     }
 }
 
 fn bad2<'short, 'long: 'short>() -> impl Coroutine<Contravariant<'long>> {
-    |_: Contravariant<'long>| {
+    #[coroutine] |_: Contravariant<'long>| {
         let a: Contravariant<'short> = yield ();
         //~^ ERROR lifetime may not live long enough
     }
 }
 
 fn good1<'short, 'long: 'short>() -> impl Coroutine<Covariant<'long>> {
-    |_: Covariant<'long>| {
+    #[coroutine] |_: Covariant<'long>| {
         let a: Covariant<'short> = yield ();
     }
 }
 
 fn good2<'short, 'long: 'short>() -> impl Coroutine<Contravariant<'short>> {
-    |_: Contravariant<'short>| {
+    #[coroutine] |_: Contravariant<'short>| {
         let a: Contravariant<'long> = yield ();
     }
 }
diff --git a/tests/ui/coroutine/check-resume-ty-lifetimes-2.stderr b/tests/ui/coroutine/check-resume-ty-lifetimes-2.stderr
index e0cbca2dd52..8eb7ab3501b 100644
--- a/tests/ui/coroutine/check-resume-ty-lifetimes-2.stderr
+++ b/tests/ui/coroutine/check-resume-ty-lifetimes-2.stderr
@@ -5,15 +5,15 @@ LL | fn bad1<'short, 'long: 'short>() -> impl Coroutine<Covariant<'short>> {
    |         ------  ----- lifetime `'long` defined here
    |         |
    |         lifetime `'short` defined here
-LL |     |_: Covariant<'short>| {
+LL |     #[coroutine] |_: Covariant<'short>| {
 LL |         let a: Covariant<'long> = yield ();
    |                ^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
    |
    = help: consider adding the following bound: `'short: 'long`
 help: consider adding 'move' keyword before the nested closure
    |
-LL |     move |_: Covariant<'short>| {
-   |     ++++
+LL |     #[coroutine] move |_: Covariant<'short>| {
+   |                  ++++
 
 error: lifetime may not live long enough
   --> $DIR/check-resume-ty-lifetimes-2.rs:18:40
@@ -22,15 +22,15 @@ LL | fn bad2<'short, 'long: 'short>() -> impl Coroutine<Contravariant<'long>> {
    |         ------  ----- lifetime `'long` defined here
    |         |
    |         lifetime `'short` defined here
-LL |     |_: Contravariant<'long>| {
+LL |     #[coroutine] |_: Contravariant<'long>| {
 LL |         let a: Contravariant<'short> = yield ();
    |                                        ^^^^^^^^ yielding this value requires that `'short` must outlive `'long`
    |
    = help: consider adding the following bound: `'short: 'long`
 help: consider adding 'move' keyword before the nested closure
    |
-LL |     move |_: Contravariant<'long>| {
-   |     ++++
+LL |     #[coroutine] move |_: Contravariant<'long>| {
+   |                  ++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/coroutine/check-resume-ty-lifetimes.rs b/tests/ui/coroutine/check-resume-ty-lifetimes.rs
index add0b5080a8..b75e46c541c 100644
--- a/tests/ui/coroutine/check-resume-ty-lifetimes.rs
+++ b/tests/ui/coroutine/check-resume-ty-lifetimes.rs
@@ -1,5 +1,5 @@
 #![feature(coroutine_trait)]
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![allow(unused)]
 
 use std::ops::Coroutine;
@@ -9,11 +9,14 @@ use std::pin::pin;
 fn mk_static(s: &str) -> &'static str {
     let mut storage: Option<&'static str> = None;
 
-    let mut coroutine = pin!(|_: &str| {
-        let x: &'static str = yield ();
-        //~^ ERROR lifetime may not live long enough
-        storage = Some(x);
-    });
+    let mut coroutine = pin!(
+        #[coroutine]
+        |_: &str| {
+            let x: &'static str = yield ();
+            //~^ ERROR lifetime may not live long enough
+            storage = Some(x);
+        }
+    );
 
     coroutine.as_mut().resume(s);
     coroutine.as_mut().resume(s);
diff --git a/tests/ui/coroutine/check-resume-ty-lifetimes.stderr b/tests/ui/coroutine/check-resume-ty-lifetimes.stderr
index f373aa778a8..1fbaeb9f7fa 100644
--- a/tests/ui/coroutine/check-resume-ty-lifetimes.stderr
+++ b/tests/ui/coroutine/check-resume-ty-lifetimes.stderr
@@ -1,11 +1,11 @@
 error: lifetime may not live long enough
-  --> $DIR/check-resume-ty-lifetimes.rs:13:16
+  --> $DIR/check-resume-ty-lifetimes.rs:15:20
    |
 LL | fn mk_static(s: &str) -> &'static str {
    |                 - let's call the lifetime of this reference `'1`
 ...
-LL |         let x: &'static str = yield ();
-   |                ^^^^^^^^^^^^ type annotation requires that `'1` must outlive `'static`
+LL |             let x: &'static str = yield ();
+   |                    ^^^^^^^^^^^^ type annotation requires that `'1` must outlive `'static`
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/coroutine/clone-impl-static.rs b/tests/ui/coroutine/clone-impl-static.rs
index 9a165cf4672..56d1ccac703 100644
--- a/tests/ui/coroutine/clone-impl-static.rs
+++ b/tests/ui/coroutine/clone-impl-static.rs
@@ -1,10 +1,11 @@
 // gate-test-coroutine_clone
 // Verifies that static coroutines cannot be cloned/copied.
 
-#![feature(coroutines, coroutine_clone)]
+#![feature(coroutines, coroutine_clone, stmt_expr_attributes)]
 
 fn main() {
-    let gen = static move || {
+    let gen = #[coroutine]
+    static move || {
         yield;
     };
     check_copy(&gen);
diff --git a/tests/ui/coroutine/clone-impl-static.stderr b/tests/ui/coroutine/clone-impl-static.stderr
index 8fa9fb12bf6..43920326d5d 100644
--- a/tests/ui/coroutine/clone-impl-static.stderr
+++ b/tests/ui/coroutine/clone-impl-static.stderr
@@ -1,27 +1,27 @@
-error[E0277]: the trait bound `{static coroutine@$DIR/clone-impl-static.rs:7:15: 7:29}: Copy` is not satisfied
-  --> $DIR/clone-impl-static.rs:10:16
+error[E0277]: the trait bound `{static coroutine@$DIR/clone-impl-static.rs:8:5: 8:19}: Copy` is not satisfied
+  --> $DIR/clone-impl-static.rs:11:16
    |
 LL |     check_copy(&gen);
-   |     ---------- ^^^^ the trait `Copy` is not implemented for `{static coroutine@$DIR/clone-impl-static.rs:7:15: 7:29}`
+   |     ---------- ^^^^ the trait `Copy` is not implemented for `{static coroutine@$DIR/clone-impl-static.rs:8:5: 8:19}`
    |     |
    |     required by a bound introduced by this call
    |
 note: required by a bound in `check_copy`
-  --> $DIR/clone-impl-static.rs:16:18
+  --> $DIR/clone-impl-static.rs:17:18
    |
 LL | fn check_copy<T: Copy>(_x: &T) {}
    |                  ^^^^ required by this bound in `check_copy`
 
-error[E0277]: the trait bound `{static coroutine@$DIR/clone-impl-static.rs:7:15: 7:29}: Clone` is not satisfied
-  --> $DIR/clone-impl-static.rs:12:17
+error[E0277]: the trait bound `{static coroutine@$DIR/clone-impl-static.rs:8:5: 8:19}: Clone` is not satisfied
+  --> $DIR/clone-impl-static.rs:13:17
    |
 LL |     check_clone(&gen);
-   |     ----------- ^^^^ the trait `Clone` is not implemented for `{static coroutine@$DIR/clone-impl-static.rs:7:15: 7:29}`
+   |     ----------- ^^^^ the trait `Clone` is not implemented for `{static coroutine@$DIR/clone-impl-static.rs:8:5: 8:19}`
    |     |
    |     required by a bound introduced by this call
    |
 note: required by a bound in `check_clone`
-  --> $DIR/clone-impl-static.rs:17:19
+  --> $DIR/clone-impl-static.rs:18:19
    |
 LL | fn check_clone<T: Clone>(_x: &T) {}
    |                   ^^^^^ required by this bound in `check_clone`
diff --git a/tests/ui/coroutine/clone-impl.rs b/tests/ui/coroutine/clone-impl.rs
index fffdae632ef..94420e56a22 100644
--- a/tests/ui/coroutine/clone-impl.rs
+++ b/tests/ui/coroutine/clone-impl.rs
@@ -2,13 +2,14 @@
 // Verifies that non-static coroutines can be cloned/copied if all their upvars and locals held
 // across awaits can be cloned/copied.
 
-#![feature(coroutines, coroutine_clone)]
+#![feature(coroutines, coroutine_clone, stmt_expr_attributes)]
 
 struct NonClone;
 
 fn test1() {
     let copyable: u32 = 123;
-    let gen_copy_0 = move || {
+    let gen_copy_0 = #[coroutine]
+    move || {
         yield;
         drop(copyable);
     };
@@ -18,7 +19,8 @@ fn test1() {
 
 fn test2() {
     let copyable: u32 = 123;
-    let gen_copy_1 = move || {
+    let gen_copy_1 = #[coroutine]
+    move || {
         /*
         let v = vec!['a'];
         let n = NonClone;
@@ -37,7 +39,8 @@ fn test2() {
 
 fn test3() {
     let clonable_0: Vec<u32> = Vec::new();
-    let gen_clone_0 = move || {
+    let gen_clone_0 = #[coroutine]
+    move || {
         let v = vec!['a'];
         yield;
         drop(v);
@@ -51,7 +54,8 @@ fn test3() {
 
 fn test4() {
     let clonable_1: Vec<u32> = Vec::new();
-    let gen_clone_1 = move || {
+    let gen_clone_1 = #[coroutine]
+    move || {
         let v = vec!['a'];
         /*
         let n = NonClone;
@@ -71,7 +75,8 @@ fn test4() {
 
 fn test5() {
     let non_clonable: NonClone = NonClone;
-    let gen_non_clone = move || {
+    let gen_non_clone = #[coroutine]
+    move || {
         yield;
         drop(non_clonable);
     };
diff --git a/tests/ui/coroutine/clone-impl.stderr b/tests/ui/coroutine/clone-impl.stderr
index b454846faac..5330d3bbd39 100644
--- a/tests/ui/coroutine/clone-impl.stderr
+++ b/tests/ui/coroutine/clone-impl.stderr
@@ -1,76 +1,76 @@
-error[E0277]: the trait bound `Vec<u32>: Copy` is not satisfied in `{coroutine@$DIR/clone-impl.rs:40:23: 40:30}`
-  --> $DIR/clone-impl.rs:46:5
+error[E0277]: the trait bound `Vec<u32>: Copy` is not satisfied in `{coroutine@$DIR/clone-impl.rs:43:5: 43:12}`
+  --> $DIR/clone-impl.rs:49:5
    |
-LL |     let gen_clone_0 = move || {
-   |                       ------- within this `{coroutine@$DIR/clone-impl.rs:40:23: 40:30}`
+LL |     move || {
+   |     ------- within this `{coroutine@$DIR/clone-impl.rs:43:5: 43:12}`
 ...
 LL |     check_copy(&gen_clone_0);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:40:23: 40:30}`, the trait `Copy` is not implemented for `Vec<u32>`, which is required by `{coroutine@$DIR/clone-impl.rs:40:23: 40:30}: Copy`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:43:5: 43:12}`, the trait `Copy` is not implemented for `Vec<u32>`, which is required by `{coroutine@$DIR/clone-impl.rs:43:5: 43:12}: Copy`
    |
 note: captured value does not implement `Copy`
-  --> $DIR/clone-impl.rs:44:14
+  --> $DIR/clone-impl.rs:47:14
    |
 LL |         drop(clonable_0);
    |              ^^^^^^^^^^ has type `Vec<u32>` which does not implement `Copy`
 note: required by a bound in `check_copy`
-  --> $DIR/clone-impl.rs:84:18
+  --> $DIR/clone-impl.rs:89:18
    |
 LL | fn check_copy<T: Copy>(_x: &T) {}
    |                  ^^^^ required by this bound in `check_copy`
 
-error[E0277]: the trait bound `Vec<char>: Copy` is not satisfied in `{coroutine@$DIR/clone-impl.rs:40:23: 40:30}`
-  --> $DIR/clone-impl.rs:46:5
+error[E0277]: the trait bound `Vec<char>: Copy` is not satisfied in `{coroutine@$DIR/clone-impl.rs:43:5: 43:12}`
+  --> $DIR/clone-impl.rs:49:5
    |
-LL |     let gen_clone_0 = move || {
-   |                       ------- within this `{coroutine@$DIR/clone-impl.rs:40:23: 40:30}`
+LL |     move || {
+   |     ------- within this `{coroutine@$DIR/clone-impl.rs:43:5: 43:12}`
 ...
 LL |     check_copy(&gen_clone_0);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:40:23: 40:30}`, the trait `Copy` is not implemented for `Vec<char>`, which is required by `{coroutine@$DIR/clone-impl.rs:40:23: 40:30}: Copy`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:43:5: 43:12}`, the trait `Copy` is not implemented for `Vec<char>`, which is required by `{coroutine@$DIR/clone-impl.rs:43:5: 43:12}: Copy`
    |
 note: coroutine does not implement `Copy` as this value is used across a yield
-  --> $DIR/clone-impl.rs:42:9
+  --> $DIR/clone-impl.rs:45:9
    |
 LL |         let v = vec!['a'];
    |             - has type `Vec<char>` which does not implement `Copy`
 LL |         yield;
    |         ^^^^^ yield occurs here, with `v` maybe used later
 note: required by a bound in `check_copy`
-  --> $DIR/clone-impl.rs:84:18
+  --> $DIR/clone-impl.rs:89:18
    |
 LL | fn check_copy<T: Copy>(_x: &T) {}
    |                  ^^^^ required by this bound in `check_copy`
 
-error[E0277]: the trait bound `Vec<u32>: Copy` is not satisfied in `{coroutine@$DIR/clone-impl.rs:54:23: 54:30}`
-  --> $DIR/clone-impl.rs:66:5
+error[E0277]: the trait bound `Vec<u32>: Copy` is not satisfied in `{coroutine@$DIR/clone-impl.rs:58:5: 58:12}`
+  --> $DIR/clone-impl.rs:70:5
    |
-LL |     let gen_clone_1 = move || {
-   |                       ------- within this `{coroutine@$DIR/clone-impl.rs:54:23: 54:30}`
+LL |     move || {
+   |     ------- within this `{coroutine@$DIR/clone-impl.rs:58:5: 58:12}`
 ...
 LL |     check_copy(&gen_clone_1);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:54:23: 54:30}`, the trait `Copy` is not implemented for `Vec<u32>`, which is required by `{coroutine@$DIR/clone-impl.rs:54:23: 54:30}: Copy`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:58:5: 58:12}`, the trait `Copy` is not implemented for `Vec<u32>`, which is required by `{coroutine@$DIR/clone-impl.rs:58:5: 58:12}: Copy`
    |
 note: captured value does not implement `Copy`
-  --> $DIR/clone-impl.rs:64:14
+  --> $DIR/clone-impl.rs:68:14
    |
 LL |         drop(clonable_1);
    |              ^^^^^^^^^^ has type `Vec<u32>` which does not implement `Copy`
 note: required by a bound in `check_copy`
-  --> $DIR/clone-impl.rs:84:18
+  --> $DIR/clone-impl.rs:89:18
    |
 LL | fn check_copy<T: Copy>(_x: &T) {}
    |                  ^^^^ required by this bound in `check_copy`
 
-error[E0277]: the trait bound `Vec<char>: Copy` is not satisfied in `{coroutine@$DIR/clone-impl.rs:54:23: 54:30}`
-  --> $DIR/clone-impl.rs:66:5
+error[E0277]: the trait bound `Vec<char>: Copy` is not satisfied in `{coroutine@$DIR/clone-impl.rs:58:5: 58:12}`
+  --> $DIR/clone-impl.rs:70:5
    |
-LL |     let gen_clone_1 = move || {
-   |                       ------- within this `{coroutine@$DIR/clone-impl.rs:54:23: 54:30}`
+LL |     move || {
+   |     ------- within this `{coroutine@$DIR/clone-impl.rs:58:5: 58:12}`
 ...
 LL |     check_copy(&gen_clone_1);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:54:23: 54:30}`, the trait `Copy` is not implemented for `Vec<char>`, which is required by `{coroutine@$DIR/clone-impl.rs:54:23: 54:30}: Copy`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:58:5: 58:12}`, the trait `Copy` is not implemented for `Vec<char>`, which is required by `{coroutine@$DIR/clone-impl.rs:58:5: 58:12}: Copy`
    |
 note: coroutine does not implement `Copy` as this value is used across a yield
-  --> $DIR/clone-impl.rs:60:9
+  --> $DIR/clone-impl.rs:64:9
    |
 LL |         let v = vec!['a'];
    |             - has type `Vec<char>` which does not implement `Copy`
@@ -78,27 +78,27 @@ LL |         let v = vec!['a'];
 LL |         yield;
    |         ^^^^^ yield occurs here, with `v` maybe used later
 note: required by a bound in `check_copy`
-  --> $DIR/clone-impl.rs:84:18
+  --> $DIR/clone-impl.rs:89:18
    |
 LL | fn check_copy<T: Copy>(_x: &T) {}
    |                  ^^^^ required by this bound in `check_copy`
 
-error[E0277]: the trait bound `NonClone: Copy` is not satisfied in `{coroutine@$DIR/clone-impl.rs:74:25: 74:32}`
-  --> $DIR/clone-impl.rs:78:5
+error[E0277]: the trait bound `NonClone: Copy` is not satisfied in `{coroutine@$DIR/clone-impl.rs:79:5: 79:12}`
+  --> $DIR/clone-impl.rs:83:5
    |
-LL |     let gen_non_clone = move || {
-   |                         ------- within this `{coroutine@$DIR/clone-impl.rs:74:25: 74:32}`
+LL |     move || {
+   |     ------- within this `{coroutine@$DIR/clone-impl.rs:79:5: 79:12}`
 ...
 LL |     check_copy(&gen_non_clone);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:74:25: 74:32}`, the trait `Copy` is not implemented for `NonClone`, which is required by `{coroutine@$DIR/clone-impl.rs:74:25: 74:32}: Copy`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:79:5: 79:12}`, the trait `Copy` is not implemented for `NonClone`, which is required by `{coroutine@$DIR/clone-impl.rs:79:5: 79:12}: Copy`
    |
 note: captured value does not implement `Copy`
-  --> $DIR/clone-impl.rs:76:14
+  --> $DIR/clone-impl.rs:81:14
    |
 LL |         drop(non_clonable);
    |              ^^^^^^^^^^^^ has type `NonClone` which does not implement `Copy`
 note: required by a bound in `check_copy`
-  --> $DIR/clone-impl.rs:84:18
+  --> $DIR/clone-impl.rs:89:18
    |
 LL | fn check_copy<T: Copy>(_x: &T) {}
    |                  ^^^^ required by this bound in `check_copy`
@@ -108,22 +108,22 @@ LL + #[derive(Copy)]
 LL | struct NonClone;
    |
 
-error[E0277]: the trait bound `NonClone: Clone` is not satisfied in `{coroutine@$DIR/clone-impl.rs:74:25: 74:32}`
-  --> $DIR/clone-impl.rs:80:5
+error[E0277]: the trait bound `NonClone: Clone` is not satisfied in `{coroutine@$DIR/clone-impl.rs:79:5: 79:12}`
+  --> $DIR/clone-impl.rs:85:5
    |
-LL |     let gen_non_clone = move || {
-   |                         ------- within this `{coroutine@$DIR/clone-impl.rs:74:25: 74:32}`
+LL |     move || {
+   |     ------- within this `{coroutine@$DIR/clone-impl.rs:79:5: 79:12}`
 ...
 LL |     check_clone(&gen_non_clone);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:74:25: 74:32}`, the trait `Clone` is not implemented for `NonClone`, which is required by `{coroutine@$DIR/clone-impl.rs:74:25: 74:32}: Clone`
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ within `{coroutine@$DIR/clone-impl.rs:79:5: 79:12}`, the trait `Clone` is not implemented for `NonClone`, which is required by `{coroutine@$DIR/clone-impl.rs:79:5: 79:12}: Clone`
    |
 note: captured value does not implement `Clone`
-  --> $DIR/clone-impl.rs:76:14
+  --> $DIR/clone-impl.rs:81:14
    |
 LL |         drop(non_clonable);
    |              ^^^^^^^^^^^^ has type `NonClone` which does not implement `Clone`
 note: required by a bound in `check_clone`
-  --> $DIR/clone-impl.rs:85:19
+  --> $DIR/clone-impl.rs:90:19
    |
 LL | fn check_clone<T: Clone>(_x: &T) {}
    |                   ^^^^^ required by this bound in `check_clone`
diff --git a/tests/ui/coroutine/clone-rpit.next.stderr b/tests/ui/coroutine/clone-rpit.next.stderr
index 41aa2d63af0..c223f1f211a 100644
--- a/tests/ui/coroutine/clone-rpit.next.stderr
+++ b/tests/ui/coroutine/clone-rpit.next.stderr
@@ -5,32 +5,32 @@ LL | pub fn foo<'a, 'b>() -> impl Clone {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
 note: ...which requires coroutine witness types for `foo::{closure#0}`...
-  --> $DIR/clone-rpit.rs:14:5
+  --> $DIR/clone-rpit.rs:15:5
    |
 LL |     move |_: ()| {
    |     ^^^^^^^^^^^^
 note: ...which requires promoting constants in MIR for `foo::{closure#0}`...
-  --> $DIR/clone-rpit.rs:14:5
+  --> $DIR/clone-rpit.rs:15:5
    |
 LL |     move |_: ()| {
    |     ^^^^^^^^^^^^
 note: ...which requires checking if `foo::{closure#0}` contains FFI-unwind calls...
-  --> $DIR/clone-rpit.rs:14:5
+  --> $DIR/clone-rpit.rs:15:5
    |
 LL |     move |_: ()| {
    |     ^^^^^^^^^^^^
 note: ...which requires building MIR for `foo::{closure#0}`...
-  --> $DIR/clone-rpit.rs:14:5
+  --> $DIR/clone-rpit.rs:15:5
    |
 LL |     move |_: ()| {
    |     ^^^^^^^^^^^^
 note: ...which requires match-checking `foo::{closure#0}`...
-  --> $DIR/clone-rpit.rs:14:5
+  --> $DIR/clone-rpit.rs:15:5
    |
 LL |     move |_: ()| {
    |     ^^^^^^^^^^^^
 note: ...which requires type-checking `foo::{closure#0}`...
-  --> $DIR/clone-rpit.rs:14:5
+  --> $DIR/clone-rpit.rs:15:5
    |
 LL |     move |_: ()| {
    |     ^^^^^^^^^^^^
diff --git a/tests/ui/coroutine/clone-rpit.rs b/tests/ui/coroutine/clone-rpit.rs
index 0df9bf61601..66569b4f427 100644
--- a/tests/ui/coroutine/clone-rpit.rs
+++ b/tests/ui/coroutine/clone-rpit.rs
@@ -11,6 +11,7 @@
 // witness types, which we don't know until after borrowck. When we later check
 // the goal for correctness, we want to be able to bind the `impl Clone` opaque.
 pub fn foo<'a, 'b>() -> impl Clone {
+    #[coroutine]
     move |_: ()| {
         let () = yield ();
     }
diff --git a/tests/ui/coroutine/conditional-drop.rs b/tests/ui/coroutine/conditional-drop.rs
index 65d3a9e701e..52e1b561946 100644
--- a/tests/ui/coroutine/conditional-drop.rs
+++ b/tests/ui/coroutine/conditional-drop.rs
@@ -3,7 +3,7 @@
 //@ revisions: default nomiropt
 //@[nomiropt]compile-flags: -Z mir-opt-level=0
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 use std::pin::Pin;
@@ -29,7 +29,7 @@ fn main() {
 }
 
 fn t1() {
-    let mut a = || {
+    let mut a = #[coroutine] || {
         let b = B;
         if test() {
             drop(b);
@@ -45,7 +45,7 @@ fn t1() {
 }
 
 fn t2() {
-    let mut a = || {
+    let mut a = #[coroutine] || {
         let b = B;
         if test2() {
             drop(b);
diff --git a/tests/ui/coroutine/control-flow.rs b/tests/ui/coroutine/control-flow.rs
index 9070ba17856..f64b6f73883 100644
--- a/tests/ui/coroutine/control-flow.rs
+++ b/tests/ui/coroutine/control-flow.rs
@@ -3,7 +3,7 @@
 //@ revisions: default nomiropt
 //@[nomiropt]compile-flags: -Z mir-opt-level=0
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::{CoroutineState, Coroutine};
 use std::pin::Pin;
@@ -24,25 +24,25 @@ fn finish<T>(mut amt: usize, mut t: T) -> T::Return
 }
 
 fn main() {
-    finish(1, || yield);
-    finish(8, || {
+    finish(1, #[coroutine] || yield);
+    finish(8, #[coroutine] || {
         for _ in 0..8 {
             yield;
         }
     });
-    finish(1, || {
+    finish(1, #[coroutine] || {
         if true {
             yield;
         } else {
         }
     });
-    finish(1, || {
+    finish(1, #[coroutine] || {
         if false {
         } else {
             yield;
         }
     });
-    finish(2, || {
+    finish(2, #[coroutine] || {
         if { yield; false } {
             yield;
             panic!()
diff --git a/tests/ui/coroutine/coroutine-region-requirements.rs b/tests/ui/coroutine/coroutine-region-requirements.rs
index 8bc34fdd2f0..ab6f16995e2 100644
--- a/tests/ui/coroutine/coroutine-region-requirements.rs
+++ b/tests/ui/coroutine/coroutine-region-requirements.rs
@@ -1,9 +1,9 @@
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 use std::ops::{Coroutine, CoroutineState};
 use std::pin::Pin;
 
 fn dangle(x: &mut i32) -> &'static mut i32 {
-    let mut g = || {
+    let mut g = #[coroutine] || {
         yield;
         x
     };
diff --git a/tests/ui/coroutine/coroutine-resume-after-panic.rs b/tests/ui/coroutine/coroutine-resume-after-panic.rs
index 8445bf7e635..2745ebc6132 100644
--- a/tests/ui/coroutine/coroutine-resume-after-panic.rs
+++ b/tests/ui/coroutine/coroutine-resume-after-panic.rs
@@ -5,7 +5,7 @@
 
 // Test that we get the correct message for resuming a panicked coroutine.
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::{
     ops::Coroutine,
@@ -14,7 +14,7 @@ use std::{
 };
 
 fn main() {
-    let mut g = || {
+    let mut g = #[coroutine] || {
         panic!();
         yield;
     };
diff --git a/tests/ui/coroutine/coroutine-with-nll.rs b/tests/ui/coroutine/coroutine-with-nll.rs
index 28a3643fbc9..fa77ab4e049 100644
--- a/tests/ui/coroutine/coroutine-with-nll.rs
+++ b/tests/ui/coroutine/coroutine-with-nll.rs
@@ -1,6 +1,7 @@
 #![feature(coroutines)]
 
 fn main() {
+    #[coroutine]
     || {
         // The reference in `_a` is a Legal with NLL since it ends before the yield
         let _a = &mut true;
diff --git a/tests/ui/coroutine/coroutine-with-nll.stderr b/tests/ui/coroutine/coroutine-with-nll.stderr
index 77e8bb1f92e..3f3d51da311 100644
--- a/tests/ui/coroutine/coroutine-with-nll.stderr
+++ b/tests/ui/coroutine/coroutine-with-nll.stderr
@@ -1,5 +1,5 @@
 error[E0626]: borrow may still be in use when coroutine yields
-  --> $DIR/coroutine-with-nll.rs:7:17
+  --> $DIR/coroutine-with-nll.rs:8:17
    |
 LL |         let b = &mut true;
    |                 ^^^^^^^^^
diff --git a/tests/ui/coroutine/coroutine-yielding-or-returning-itself.rs b/tests/ui/coroutine/coroutine-yielding-or-returning-itself.rs
index 3c91b3c9329..f3110d71d0d 100644
--- a/tests/ui/coroutine/coroutine-yielding-or-returning-itself.rs
+++ b/tests/ui/coroutine/coroutine-yielding-or-returning-itself.rs
@@ -1,5 +1,5 @@
 #![feature(coroutine_trait)]
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 // Test that we cannot create a coroutine that returns a value of its
 // own type.
@@ -12,7 +12,7 @@ pub fn want_cyclic_coroutine_return<T>(_: T)
 }
 
 fn supply_cyclic_coroutine_return() {
-    want_cyclic_coroutine_return(|| {
+    want_cyclic_coroutine_return(#[coroutine] || {
         //~^ ERROR type mismatch
         if false { yield None.unwrap(); }
         None.unwrap()
@@ -25,7 +25,7 @@ pub fn want_cyclic_coroutine_yield<T>(_: T)
 }
 
 fn supply_cyclic_coroutine_yield() {
-    want_cyclic_coroutine_yield(|| {
+    want_cyclic_coroutine_yield(#[coroutine] || {
         //~^ ERROR type mismatch
         if false { yield None.unwrap(); }
         None.unwrap()
diff --git a/tests/ui/coroutine/coroutine-yielding-or-returning-itself.stderr b/tests/ui/coroutine/coroutine-yielding-or-returning-itself.stderr
index 325030524ba..32799148ae1 100644
--- a/tests/ui/coroutine/coroutine-yielding-or-returning-itself.stderr
+++ b/tests/ui/coroutine/coroutine-yielding-or-returning-itself.stderr
@@ -1,8 +1,8 @@
-error[E0271]: type mismatch resolving `<{coroutine@$DIR/coroutine-yielding-or-returning-itself.rs:15:34: 15:36} as Coroutine>::Return == {coroutine@$DIR/coroutine-yielding-or-returning-itself.rs:15:34: 15:36}`
-  --> $DIR/coroutine-yielding-or-returning-itself.rs:15:34
+error[E0271]: type mismatch resolving `<{coroutine@$DIR/coroutine-yielding-or-returning-itself.rs:15:47: 15:49} as Coroutine>::Return == {coroutine@$DIR/coroutine-yielding-or-returning-itself.rs:15:47: 15:49}`
+  --> $DIR/coroutine-yielding-or-returning-itself.rs:15:47
    |
-LL |       want_cyclic_coroutine_return(|| {
-   |  _____----------------------------_^
+LL |       want_cyclic_coroutine_return(#[coroutine] || {
+   |  _____----------------------------______________^
    | |     |
    | |     required by a bound introduced by this call
 LL | |
@@ -23,11 +23,11 @@ LL | pub fn want_cyclic_coroutine_return<T>(_: T)
 LL |     where T: Coroutine<Yield = (), Return = T>
    |                                    ^^^^^^^^^^ required by this bound in `want_cyclic_coroutine_return`
 
-error[E0271]: type mismatch resolving `<{coroutine@$DIR/coroutine-yielding-or-returning-itself.rs:28:33: 28:35} as Coroutine>::Yield == {coroutine@$DIR/coroutine-yielding-or-returning-itself.rs:28:33: 28:35}`
-  --> $DIR/coroutine-yielding-or-returning-itself.rs:28:33
+error[E0271]: type mismatch resolving `<{coroutine@$DIR/coroutine-yielding-or-returning-itself.rs:28:46: 28:48} as Coroutine>::Yield == {coroutine@$DIR/coroutine-yielding-or-returning-itself.rs:28:46: 28:48}`
+  --> $DIR/coroutine-yielding-or-returning-itself.rs:28:46
    |
-LL |       want_cyclic_coroutine_yield(|| {
-   |  _____---------------------------_^
+LL |       want_cyclic_coroutine_yield(#[coroutine] || {
+   |  _____---------------------------______________^
    | |     |
    | |     required by a bound introduced by this call
 LL | |
diff --git a/tests/ui/coroutine/derived-drop-parent-expr.rs b/tests/ui/coroutine/derived-drop-parent-expr.rs
index f70a732c90f..cc217e4960e 100644
--- a/tests/ui/coroutine/derived-drop-parent-expr.rs
+++ b/tests/ui/coroutine/derived-drop-parent-expr.rs
@@ -1,7 +1,7 @@
 //@ build-pass
 
 //! Like drop-tracking-parent-expression, but also tests that this doesn't ICE when building MIR
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 fn assert_send<T: Send>(_thing: T) {}
 
@@ -9,8 +9,8 @@ fn assert_send<T: Send>(_thing: T) {}
 pub struct Client { pub nickname: String }
 
 fn main() {
-    let g = move || match drop(Client { ..Client::default() }) {
-        _status => yield,
-    };
+    let g = #[coroutine] move || match drop(Client { ..Client::default() }) {
+            _status => yield,
+        };
     assert_send(g);
 }
diff --git a/tests/ui/coroutine/discriminant.rs b/tests/ui/coroutine/discriminant.rs
index a44d8f74746..d6879e21825 100644
--- a/tests/ui/coroutine/discriminant.rs
+++ b/tests/ui/coroutine/discriminant.rs
@@ -86,7 +86,7 @@ fn cycle(
 fn main() {
     // Has only one invalid discr. value.
     let gen_u8_tiny_niche = || {
-        || {
+        #[coroutine] || {
             // 3 reserved variants
 
             yield250!(); // 253 variants
@@ -98,7 +98,7 @@ fn main() {
 
     // Uses all values in the u8 discriminant.
     let gen_u8_full = || {
-        || {
+        #[coroutine] || {
             // 3 reserved variants
 
             yield250!(); // 253 variants
@@ -111,7 +111,7 @@ fn main() {
 
     // Barely needs a u16 discriminant.
     let gen_u16 = || {
-        || {
+        #[coroutine] || {
             // 3 reserved variants
 
             yield250!(); // 253 variants
diff --git a/tests/ui/coroutine/drop-and-replace.rs b/tests/ui/coroutine/drop-and-replace.rs
index 6e30d76512b..d3d7e000020 100644
--- a/tests/ui/coroutine/drop-and-replace.rs
+++ b/tests/ui/coroutine/drop-and-replace.rs
@@ -4,7 +4,7 @@
 // #60187, this produced incorrect code for coroutines when a saved local was
 // re-assigned.
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::{Coroutine, CoroutineState};
 use std::pin::Pin;
@@ -17,7 +17,8 @@ impl Drop for Foo {
 }
 
 fn main() {
-    let mut a = || {
+    let mut a = #[coroutine]
+    || {
         let mut x = Foo(4);
         yield;
         assert_eq!(x.0, 4);
diff --git a/tests/ui/coroutine/drop-control-flow.rs b/tests/ui/coroutine/drop-control-flow.rs
index f4e8eed4f8d..f576b1b7594 100644
--- a/tests/ui/coroutine/drop-control-flow.rs
+++ b/tests/ui/coroutine/drop-control-flow.rs
@@ -4,7 +4,7 @@
 // and also that values that are dropped along all paths to a yield do not get
 // included in the coroutine type.
 
-#![feature(coroutines, negative_impls)]
+#![feature(coroutines, negative_impls, stmt_expr_attributes)]
 #![allow(unused_assignments, dead_code)]
 
 struct Ptr;
@@ -19,7 +19,7 @@ fn assert_send<T: Send>(_: T) {}
 
 // This test case is reduced from tests/ui/drop/dynamic-drop-async.rs
 fn one_armed_if(arg: bool) {
-    let _ = || {
+    let _ = #[coroutine] || {
         let arr = [Ptr];
         if arg {
             drop(arr);
@@ -29,7 +29,7 @@ fn one_armed_if(arg: bool) {
 }
 
 fn two_armed_if(arg: bool) {
-    assert_send(|| {
+    assert_send(#[coroutine] || {
         let arr = [Ptr];
         if arg {
             drop(arr);
@@ -41,7 +41,7 @@ fn two_armed_if(arg: bool) {
 }
 
 fn if_let(arg: Option<i32>) {
-    let _ = || {
+    let _ = #[coroutine] || {
         let arr = [Ptr];
         if let Some(_) = arg {
             drop(arr);
@@ -51,7 +51,7 @@ fn if_let(arg: Option<i32>) {
 }
 
 fn init_in_if(arg: bool) {
-    assert_send(|| {
+    assert_send(#[coroutine] || {
         let mut x = NonSend;
         drop(x);
         if arg {
@@ -63,7 +63,7 @@ fn init_in_if(arg: bool) {
 }
 
 fn init_in_match_arm(arg: Option<i32>) {
-    assert_send(|| {
+    assert_send(#[coroutine] || {
         let mut x = NonSend;
         drop(x);
         match arg {
@@ -74,7 +74,7 @@ fn init_in_match_arm(arg: Option<i32>) {
 }
 
 fn reinit() {
-    let _ = || {
+    let _ = #[coroutine] || {
         let mut arr = [Ptr];
         drop(arr);
         arr = [Ptr];
@@ -83,7 +83,7 @@ fn reinit() {
 }
 
 fn loop_uninit() {
-    let _ = || {
+    let _ = #[coroutine] || {
         let mut arr = [Ptr];
         let mut count = 0;
         drop(arr);
@@ -96,7 +96,7 @@ fn loop_uninit() {
 }
 
 fn nested_loop() {
-    let _ = || {
+    let _ = #[coroutine] || {
         let mut arr = [Ptr];
         let mut count = 0;
         drop(arr);
@@ -111,7 +111,7 @@ fn nested_loop() {
 }
 
 fn loop_continue(b: bool) {
-    let _ = || {
+    let _ = #[coroutine] || {
         let mut arr = [Ptr];
         let mut count = 0;
         drop(arr);
diff --git a/tests/ui/coroutine/drop-env.rs b/tests/ui/coroutine/drop-env.rs
index b189ab81499..d36228dc849 100644
--- a/tests/ui/coroutine/drop-env.rs
+++ b/tests/ui/coroutine/drop-env.rs
@@ -3,7 +3,7 @@
 //@ revisions: default nomiropt
 //@[nomiropt]compile-flags: -Z mir-opt-level=0
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 #![allow(dropping_copy_types)]
 
 use std::ops::Coroutine;
@@ -28,7 +28,7 @@ fn main() {
 
 fn t1() {
     let b = B;
-    let mut foo = || {
+    let mut foo = #[coroutine] || {
         yield;
         drop(b);
     };
@@ -42,7 +42,7 @@ fn t1() {
 
 fn t2() {
     let b = B;
-    let mut foo = || {
+    let mut foo = #[coroutine] || {
         yield b;
     };
 
@@ -55,7 +55,7 @@ fn t2() {
 
 fn t3() {
     let b = B;
-    let foo = || {
+    let foo = #[coroutine] || {
         yield;
         drop(b);
     };
diff --git a/tests/ui/coroutine/drop-track-addassign-yield.rs b/tests/ui/coroutine/drop-track-addassign-yield.rs
index b1a4bd79f31..537e66c41b2 100644
--- a/tests/ui/coroutine/drop-track-addassign-yield.rs
+++ b/tests/ui/coroutine/drop-track-addassign-yield.rs
@@ -3,10 +3,10 @@
 // Based on addassign-yield.rs, but with drop tracking enabled. Originally we did not implement
 // the fake_read callback on ExprUseVisitor which caused this case to break.
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 fn foo() {
-    let _y = static || {
+    let _y = #[coroutine] static || {
         let x = &mut 0;
         *{
             yield;
@@ -17,7 +17,7 @@ fn foo() {
     };
 
     // Please don't ever actually write something like this
-    let _z = static || {
+    let _z = #[coroutine] static || {
         let x = &mut 0;
         *{
             let inner = &mut 1;
diff --git a/tests/ui/coroutine/drop-tracking-parent-expression.rs b/tests/ui/coroutine/drop-tracking-parent-expression.rs
index 4d40192c07a..0f4d99c8936 100644
--- a/tests/ui/coroutine/drop-tracking-parent-expression.rs
+++ b/tests/ui/coroutine/drop-tracking-parent-expression.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines, negative_impls, rustc_attrs)]
+#![feature(coroutines, negative_impls, rustc_attrs, stmt_expr_attributes)]
 
 macro_rules! type_combinations {
     (
@@ -14,7 +14,7 @@ macro_rules! type_combinations {
         // Struct update syntax. This fails because the Client used in the update is considered
         // dropped *after* the yield.
         {
-            let g = move || match drop($name::Client { ..$name::Client::default() }) {
+            let g = #[coroutine] move || match drop($name::Client { ..$name::Client::default() }) {
             //~^ `significant_drop::Client` which is not `Send`
             //~| `insignificant_dtor::Client` which is not `Send`
             //~| `derived_drop::Client` which is not `Send`
@@ -29,7 +29,7 @@ macro_rules! type_combinations {
         // Simple owned value. This works because the Client is considered moved into `drop`,
         // even though the temporary expression doesn't end until after the yield.
         {
-            let g = move || match drop($name::Client::default()) {
+            let g = #[coroutine] move || match drop($name::Client::default()) {
                 _ => yield,
             };
             assert_send(g);
diff --git a/tests/ui/coroutine/drop-tracking-parent-expression.stderr b/tests/ui/coroutine/drop-tracking-parent-expression.stderr
index 21aa35b9579..5f8d8495e4f 100644
--- a/tests/ui/coroutine/drop-tracking-parent-expression.stderr
+++ b/tests/ui/coroutine/drop-tracking-parent-expression.stderr
@@ -13,12 +13,12 @@ LL | |         };
 LL | |     );
    | |_____- in this macro invocation
    |
-   = help: within `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:21: 17:28}`, the trait `Send` is not implemented for `derived_drop::Client`, which is required by `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:21: 17:28}: Send`
+   = help: within `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:34: 17:41}`, the trait `Send` is not implemented for `derived_drop::Client`, which is required by `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:34: 17:41}: Send`
 note: coroutine is not `Send` as this value is used across a yield
   --> $DIR/drop-tracking-parent-expression.rs:21:22
    |
-LL |               let g = move || match drop($name::Client { ..$name::Client::default() }) {
-   |                                                            ------------------------ has type `derived_drop::Client` which is not `Send`
+LL |               let g = #[coroutine] move || match drop($name::Client { ..$name::Client::default() }) {
+   |                                                                         ------------------------ has type `derived_drop::Client` which is not `Send`
 ...
 LL |                   _ => yield,
    |                        ^^^^^ yield occurs here, with `$name::Client::default()` maybe used later
@@ -53,12 +53,12 @@ LL | |         };
 LL | |     );
    | |_____- in this macro invocation
    |
-   = help: within `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:21: 17:28}`, the trait `Send` is not implemented for `significant_drop::Client`, which is required by `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:21: 17:28}: Send`
+   = help: within `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:34: 17:41}`, the trait `Send` is not implemented for `significant_drop::Client`, which is required by `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:34: 17:41}: Send`
 note: coroutine is not `Send` as this value is used across a yield
   --> $DIR/drop-tracking-parent-expression.rs:21:22
    |
-LL |               let g = move || match drop($name::Client { ..$name::Client::default() }) {
-   |                                                            ------------------------ has type `significant_drop::Client` which is not `Send`
+LL |               let g = #[coroutine] move || match drop($name::Client { ..$name::Client::default() }) {
+   |                                                                         ------------------------ has type `significant_drop::Client` which is not `Send`
 ...
 LL |                   _ => yield,
    |                        ^^^^^ yield occurs here, with `$name::Client::default()` maybe used later
@@ -93,12 +93,12 @@ LL | |         };
 LL | |     );
    | |_____- in this macro invocation
    |
-   = help: within `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:21: 17:28}`, the trait `Send` is not implemented for `insignificant_dtor::Client`, which is required by `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:21: 17:28}: Send`
+   = help: within `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:34: 17:41}`, the trait `Send` is not implemented for `insignificant_dtor::Client`, which is required by `{coroutine@$DIR/drop-tracking-parent-expression.rs:17:34: 17:41}: Send`
 note: coroutine is not `Send` as this value is used across a yield
   --> $DIR/drop-tracking-parent-expression.rs:21:22
    |
-LL |               let g = move || match drop($name::Client { ..$name::Client::default() }) {
-   |                                                            ------------------------ has type `insignificant_dtor::Client` which is not `Send`
+LL |               let g = #[coroutine] move || match drop($name::Client { ..$name::Client::default() }) {
+   |                                                                         ------------------------ has type `insignificant_dtor::Client` which is not `Send`
 ...
 LL |                   _ => yield,
    |                        ^^^^^ yield occurs here, with `$name::Client::default()` maybe used later
diff --git a/tests/ui/coroutine/drop-tracking-yielding-in-match-guards.rs b/tests/ui/coroutine/drop-tracking-yielding-in-match-guards.rs
index 0f94016f11b..43e42fa85f7 100644
--- a/tests/ui/coroutine/drop-tracking-yielding-in-match-guards.rs
+++ b/tests/ui/coroutine/drop-tracking-yielding-in-match-guards.rs
@@ -1,10 +1,10 @@
 //@ build-pass
 //@ edition:2018
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 fn main() {
-    let _ = static |x: u8| match x {
+    let _ = #[coroutine] static |x: u8| match x {
         y if { yield } == y + 1 => (),
         _ => (),
     };
diff --git a/tests/ui/coroutine/drop-yield-twice.rs b/tests/ui/coroutine/drop-yield-twice.rs
index 015343a2776..7ac1345b2ff 100644
--- a/tests/ui/coroutine/drop-yield-twice.rs
+++ b/tests/ui/coroutine/drop-yield-twice.rs
@@ -1,10 +1,10 @@
-#![feature(negative_impls, coroutines)]
+#![feature(negative_impls, coroutines, stmt_expr_attributes)]
 
 struct Foo(i32);
 impl !Send for Foo {}
 
 fn main() {
-    assert_send(|| { //~ ERROR coroutine cannot be sent between threads safely
+    assert_send(#[coroutine] || { //~ ERROR coroutine cannot be sent between threads safely
         let guard = Foo(42);
         yield;
         drop(guard);
diff --git a/tests/ui/coroutine/drop-yield-twice.stderr b/tests/ui/coroutine/drop-yield-twice.stderr
index c6a9e20b8b5..362c6e943ad 100644
--- a/tests/ui/coroutine/drop-yield-twice.stderr
+++ b/tests/ui/coroutine/drop-yield-twice.stderr
@@ -1,7 +1,7 @@
 error: coroutine cannot be sent between threads safely
   --> $DIR/drop-yield-twice.rs:7:5
    |
-LL | /     assert_send(|| {
+LL | /     assert_send(#[coroutine] || {
 LL | |         let guard = Foo(42);
 LL | |         yield;
 LL | |         drop(guard);
@@ -9,7 +9,7 @@ LL | |         yield;
 LL | |     })
    | |______^ coroutine is not `Send`
    |
-   = help: within `{coroutine@$DIR/drop-yield-twice.rs:7:17: 7:19}`, the trait `Send` is not implemented for `Foo`, which is required by `{coroutine@$DIR/drop-yield-twice.rs:7:17: 7:19}: Send`
+   = help: within `{coroutine@$DIR/drop-yield-twice.rs:7:30: 7:32}`, the trait `Send` is not implemented for `Foo`, which is required by `{coroutine@$DIR/drop-yield-twice.rs:7:30: 7:32}: Send`
 note: coroutine is not `Send` as this value is used across a yield
   --> $DIR/drop-yield-twice.rs:9:9
    |
diff --git a/tests/ui/coroutine/dropck-resume.rs b/tests/ui/coroutine/dropck-resume.rs
index 07ca4d37aba..df014400f00 100644
--- a/tests/ui/coroutine/dropck-resume.rs
+++ b/tests/ui/coroutine/dropck-resume.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::{Coroutine, CoroutineState};
 use std::pin::Pin;
@@ -16,7 +16,8 @@ fn drop_using_coroutine() -> i32 {
     let z = &mut y;
     let r;
     {
-        let mut g = move |r| {
+        let mut g = #[coroutine]
+        move |r| {
             let _s = SetToNone(r);
             yield;
         };
diff --git a/tests/ui/coroutine/dropck-resume.stderr b/tests/ui/coroutine/dropck-resume.stderr
index aa6e423c760..e9243ffa41e 100644
--- a/tests/ui/coroutine/dropck-resume.stderr
+++ b/tests/ui/coroutine/dropck-resume.stderr
@@ -1,5 +1,5 @@
 error[E0502]: cannot borrow `y` as immutable because it is also borrowed as mutable
-  --> $DIR/dropck-resume.rs:25:13
+  --> $DIR/dropck-resume.rs:26:13
    |
 LL |     let z = &mut y;
    |             ------ mutable borrow occurs here
diff --git a/tests/ui/coroutine/dropck.rs b/tests/ui/coroutine/dropck.rs
index 450361c8dd0..9331c1fa1d5 100644
--- a/tests/ui/coroutine/dropck.rs
+++ b/tests/ui/coroutine/dropck.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::cell::RefCell;
 use std::ops::Coroutine;
@@ -10,7 +10,8 @@ fn main() {
     let ref_ = Box::leak(Box::new(Some(cell.borrow_mut())));
     //~^ ERROR `*cell` does not live long enough [E0597]
     // the upvar is the non-dropck `&mut Option<Ref<'a, i32>>`.
-    gen = || {
+    gen = #[coroutine]
+    || {
         // but the coroutine can use it to drop a `Ref<'a, i32>`.
         let _d = ref_.take(); //~ ERROR `ref_` does not live long enough
         yield;
diff --git a/tests/ui/coroutine/dropck.stderr b/tests/ui/coroutine/dropck.stderr
index 241d6dfe0a1..78fdeec972f 100644
--- a/tests/ui/coroutine/dropck.stderr
+++ b/tests/ui/coroutine/dropck.stderr
@@ -16,10 +16,13 @@ LL | }
    = note: values in a scope are dropped in the opposite order they are defined
 
 error[E0597]: `ref_` does not live long enough
-  --> $DIR/dropck.rs:15:18
+  --> $DIR/dropck.rs:16:18
    |
-LL |     gen = || {
-   |           -- value captured here by coroutine
+LL |     let ref_ = Box::leak(Box::new(Some(cell.borrow_mut())));
+   |         ---- binding `ref_` declared here
+...
+LL |     || {
+   |     -- value captured here by coroutine
 LL |         // but the coroutine can use it to drop a `Ref<'a, i32>`.
 LL |         let _d = ref_.take();
    |                  ^^^^ borrowed value does not live long enough
diff --git a/tests/ui/coroutine/gen_block.e2024.stderr b/tests/ui/coroutine/gen_block.e2024.stderr
index 2b9eb4a820b..322259cf2f8 100644
--- a/tests/ui/coroutine/gen_block.e2024.stderr
+++ b/tests/ui/coroutine/gen_block.e2024.stderr
@@ -1,5 +1,25 @@
+error[E0658]: the `#[coroutines]` attribute is an experimental feature
+  --> $DIR/gen_block.rs:20:13
+   |
+LL |     let _ = #[coroutine] || yield true;
+   |             ^^^^^^^^^^^^
+   |
+   = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
+   = help: add `#![feature(coroutines)]` to the crate attributes to enable
+   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+
+error[E0658]: the `#[coroutines]` attribute is an experimental feature
+  --> $DIR/gen_block.rs:24:13
+   |
+LL |     let _ = #[coroutine] || {};
+   |             ^^^^^^^^^^^^
+   |
+   = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
+   = help: add `#![feature(coroutines)]` to the crate attributes to enable
+   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+
 error[E0658]: yield syntax is experimental
-  --> $DIR/gen_block.rs:15:16
+  --> $DIR/gen_block.rs:16:16
    |
 LL |     let _ = || yield true;
    |                ^^^^^^^^^^
@@ -8,13 +28,34 @@ LL |     let _ = || yield true;
    = help: add `#![feature(coroutines)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/gen_block.rs:16:16
+   |
+LL |     let _ = || yield true;
+   |                ^^^^^^^^^^
+   |
+help: use `#[coroutine]` to make this closure a coroutine
+   |
+LL |     let _ = #[coroutine] || yield true;
+   |             ++++++++++++
+
+error[E0658]: yield syntax is experimental
+  --> $DIR/gen_block.rs:20:29
+   |
+LL |     let _ = #[coroutine] || yield true;
+   |                             ^^^^^^^^^^
+   |
+   = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
+   = help: add `#![feature(coroutines)]` to the crate attributes to enable
+   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+
 error[E0282]: type annotations needed
-  --> $DIR/gen_block.rs:6:13
+  --> $DIR/gen_block.rs:7:13
    |
 LL |     let x = gen {};
    |             ^^^^^^ cannot infer type
 
-error: aborting due to 2 previous errors
+error: aborting due to 6 previous errors
 
 Some errors have detailed explanations: E0282, E0658.
 For more information about an error, try `rustc --explain E0282`.
diff --git a/tests/ui/coroutine/gen_block.none.stderr b/tests/ui/coroutine/gen_block.none.stderr
index 78a8c5e798a..64fa2be003d 100644
--- a/tests/ui/coroutine/gen_block.none.stderr
+++ b/tests/ui/coroutine/gen_block.none.stderr
@@ -1,5 +1,5 @@
 error: expected identifier, found reserved keyword `yield`
-  --> $DIR/gen_block.rs:9:19
+  --> $DIR/gen_block.rs:10:19
    |
 LL |     let y = gen { yield 42 };
    |             ---   ^^^^^ expected identifier, found reserved keyword
@@ -7,25 +7,25 @@ LL |     let y = gen { yield 42 };
    |             while parsing this struct
 
 error[E0422]: cannot find struct, variant or union type `gen` in this scope
-  --> $DIR/gen_block.rs:6:13
+  --> $DIR/gen_block.rs:7:13
    |
 LL |     let x = gen {};
    |             ^^^ not found in this scope
 
 error[E0422]: cannot find struct, variant or union type `gen` in this scope
-  --> $DIR/gen_block.rs:9:13
+  --> $DIR/gen_block.rs:10:13
    |
 LL |     let y = gen { yield 42 };
    |             ^^^ not found in this scope
 
 error[E0422]: cannot find struct, variant or union type `gen` in this scope
-  --> $DIR/gen_block.rs:12:5
+  --> $DIR/gen_block.rs:13:5
    |
 LL |     gen {};
    |     ^^^ not found in this scope
 
 error[E0658]: yield syntax is experimental
-  --> $DIR/gen_block.rs:15:16
+  --> $DIR/gen_block.rs:16:16
    |
 LL |     let _ = || yield true;
    |                ^^^^^^^^^^
@@ -35,17 +35,69 @@ LL |     let _ = || yield true;
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
 error[E0658]: yield syntax is experimental
-  --> $DIR/gen_block.rs:15:16
+  --> $DIR/gen_block.rs:20:29
+   |
+LL |     let _ = #[coroutine] || yield true;
+   |                             ^^^^^^^^^^
+   |
+   = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
+   = help: add `#![feature(coroutines)]` to the crate attributes to enable
+   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+
+error[E0658]: the `#[coroutines]` attribute is an experimental feature
+  --> $DIR/gen_block.rs:20:13
+   |
+LL |     let _ = #[coroutine] || yield true;
+   |             ^^^^^^^^^^^^
+   |
+   = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
+   = help: add `#![feature(coroutines)]` to the crate attributes to enable
+   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+
+error[E0658]: the `#[coroutines]` attribute is an experimental feature
+  --> $DIR/gen_block.rs:24:13
+   |
+LL |     let _ = #[coroutine] || {};
+   |             ^^^^^^^^^^^^
+   |
+   = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
+   = help: add `#![feature(coroutines)]` to the crate attributes to enable
+   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+
+error[E0658]: yield syntax is experimental
+  --> $DIR/gen_block.rs:16:16
+   |
+LL |     let _ = || yield true;
+   |                ^^^^^^^^^^
+   |
+   = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
+   = help: add `#![feature(coroutines)]` to the crate attributes to enable
+   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
+
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/gen_block.rs:16:16
    |
 LL |     let _ = || yield true;
    |                ^^^^^^^^^^
    |
+help: use `#[coroutine]` to make this closure a coroutine
+   |
+LL |     let _ = #[coroutine] || yield true;
+   |             ++++++++++++
+
+error[E0658]: yield syntax is experimental
+  --> $DIR/gen_block.rs:20:29
+   |
+LL |     let _ = #[coroutine] || yield true;
+   |                             ^^^^^^^^^^
+   |
    = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
    = help: add `#![feature(coroutines)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
    = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
-error: aborting due to 6 previous errors
+error: aborting due to 11 previous errors
 
 Some errors have detailed explanations: E0422, E0658.
 For more information about an error, try `rustc --explain E0422`.
diff --git a/tests/ui/coroutine/gen_block.rs b/tests/ui/coroutine/gen_block.rs
index f6a775aa661..7e87a572b90 100644
--- a/tests/ui/coroutine/gen_block.rs
+++ b/tests/ui/coroutine/gen_block.rs
@@ -1,6 +1,7 @@
 //@ revisions: e2024 none
 //@[e2024] compile-flags: --edition 2024 -Zunstable-options
 #![cfg_attr(e2024, feature(gen_blocks))]
+#![feature(stmt_expr_attributes)]
 
 fn main() {
     let x = gen {};
@@ -14,4 +15,12 @@ fn main() {
 
     let _ = || yield true; //[none]~ ERROR yield syntax is experimental
     //~^ ERROR yield syntax is experimental
+    //~^^ ERROR `yield` can only be used in
+
+    let _ = #[coroutine] || yield true; //[none]~ ERROR yield syntax is experimental
+    //~^ ERROR `#[coroutines]` attribute is an experimental feature
+    //~^^ ERROR yield syntax is experimental
+
+    let _ = #[coroutine] || {};
+    //~^ ERROR `#[coroutines]` attribute is an experimental feature
 }
diff --git a/tests/ui/coroutine/issue-102645.rs b/tests/ui/coroutine/issue-102645.rs
index a0263510e13..ccf82c3606a 100644
--- a/tests/ui/coroutine/issue-102645.rs
+++ b/tests/ui/coroutine/issue-102645.rs
@@ -1,11 +1,12 @@
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 use std::pin::Pin;
 
 fn main() {
     let mut a = 5;
-    let mut b = || {
+    let mut b = #[coroutine]
+    || {
         let d = 6;
         yield;
         _zzz(); // #break
diff --git a/tests/ui/coroutine/issue-102645.stderr b/tests/ui/coroutine/issue-102645.stderr
index 7a3b7f2b04c..ab5e4a8459f 100644
--- a/tests/ui/coroutine/issue-102645.stderr
+++ b/tests/ui/coroutine/issue-102645.stderr
@@ -1,5 +1,5 @@
 error[E0061]: this method takes 1 argument but 0 arguments were supplied
-  --> $DIR/issue-102645.rs:14:22
+  --> $DIR/issue-102645.rs:15:22
    |
 LL |     Pin::new(&mut b).resume();
    |                      ^^^^^^-- an argument of type `()` is missing
diff --git a/tests/ui/coroutine/issue-105084.rs b/tests/ui/coroutine/issue-105084.rs
index 7801f1bcea0..4e40bc127d7 100644
--- a/tests/ui/coroutine/issue-105084.rs
+++ b/tests/ui/coroutine/issue-105084.rs
@@ -11,7 +11,8 @@ fn copy<T: Copy>(x: T) -> T {
 }
 
 fn main() {
-    let mut g = || {
+    let mut g = #[coroutine]
+    || {
         // This is desuraged as 4 stages:
         // - allocate a `*mut u8` with `exchange_malloc`;
         // - create a Box that is ignored for trait computations;
diff --git a/tests/ui/coroutine/issue-105084.stderr b/tests/ui/coroutine/issue-105084.stderr
index c8a6522dbd9..6b1701f0c2a 100644
--- a/tests/ui/coroutine/issue-105084.stderr
+++ b/tests/ui/coroutine/issue-105084.stderr
@@ -1,8 +1,8 @@
 error[E0382]: borrow of moved value: `g`
-  --> $DIR/issue-105084.rs:37:14
+  --> $DIR/issue-105084.rs:38:14
    |
-LL |     let mut g = || {
-   |         ----- move occurs because `g` has type `{coroutine@$DIR/issue-105084.rs:14:17: 14:19}`, which does not implement the `Copy` trait
+LL |     let mut g = #[coroutine]
+   |         ----- move occurs because `g` has type `{coroutine@$DIR/issue-105084.rs:15:5: 15:7}`, which does not implement the `Copy` trait
 ...
 LL |     let mut h = copy(g);
    |                      - value moved here
@@ -22,17 +22,17 @@ help: consider cloning the value if the performance cost is acceptable
 LL |     let mut h = copy(g.clone());
    |                       ++++++++
 
-error[E0277]: the trait bound `Box<(i32, ())>: Copy` is not satisfied in `{coroutine@$DIR/issue-105084.rs:14:17: 14:19}`
-  --> $DIR/issue-105084.rs:31:17
+error[E0277]: the trait bound `Box<(i32, ())>: Copy` is not satisfied in `{coroutine@$DIR/issue-105084.rs:15:5: 15:7}`
+  --> $DIR/issue-105084.rs:32:17
    |
-LL |     let mut g = || {
-   |                 -- within this `{coroutine@$DIR/issue-105084.rs:14:17: 14:19}`
+LL |     || {
+   |     -- within this `{coroutine@$DIR/issue-105084.rs:15:5: 15:7}`
 ...
 LL |     let mut h = copy(g);
-   |                 ^^^^^^^ within `{coroutine@$DIR/issue-105084.rs:14:17: 14:19}`, the trait `Copy` is not implemented for `Box<(i32, ())>`, which is required by `{coroutine@$DIR/issue-105084.rs:14:17: 14:19}: Copy`
+   |                 ^^^^^^^ within `{coroutine@$DIR/issue-105084.rs:15:5: 15:7}`, the trait `Copy` is not implemented for `Box<(i32, ())>`, which is required by `{coroutine@$DIR/issue-105084.rs:15:5: 15:7}: Copy`
    |
 note: coroutine does not implement `Copy` as this value is used across a yield
-  --> $DIR/issue-105084.rs:21:22
+  --> $DIR/issue-105084.rs:22:22
    |
 LL |         Box::new((5, yield));
    |         -------------^^^^^--
diff --git a/tests/ui/coroutine/issue-110929-coroutine-conflict-error-ice.rs b/tests/ui/coroutine/issue-110929-coroutine-conflict-error-ice.rs
index 3d372ac9110..300c8fe6d46 100644
--- a/tests/ui/coroutine/issue-110929-coroutine-conflict-error-ice.rs
+++ b/tests/ui/coroutine/issue-110929-coroutine-conflict-error-ice.rs
@@ -1,11 +1,12 @@
 //@ edition:2021
 //@ check-pass
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 fn main() {
     let x = &mut ();
     || {
-        let _c = || yield *&mut *x;
+        let _c = #[coroutine]
+        || yield *&mut *x;
         || _ = &mut *x;
     };
 }
diff --git a/tests/ui/coroutine/issue-113279.rs b/tests/ui/coroutine/issue-113279.rs
index f251c924c13..98617af105c 100644
--- a/tests/ui/coroutine/issue-113279.rs
+++ b/tests/ui/coroutine/issue-113279.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 // `foo` attempts to dereference `""`, which results in an error being reported. Later, the
 // coroutine transform for `foo` then produces a union which contains a `str` type - unions should
@@ -9,7 +9,8 @@
 // makes sure that doesn't happen again.
 
 fn foo() {
-    let _y = static || {
+    let _y = #[coroutine]
+    static || {
         let x = &mut 0;
         *{
             yield;
diff --git a/tests/ui/coroutine/issue-113279.stderr b/tests/ui/coroutine/issue-113279.stderr
index cc9b64ef9ac..a80fe670188 100644
--- a/tests/ui/coroutine/issue-113279.stderr
+++ b/tests/ui/coroutine/issue-113279.stderr
@@ -1,11 +1,11 @@
 error[E0161]: cannot move a value of type `str`
-  --> $DIR/issue-113279.rs:17:20
+  --> $DIR/issue-113279.rs:18:20
    |
 LL |         } += match { *"" }.len() {
    |                    ^^^^^^^ the size of `str` cannot be statically determined
 
 error[E0507]: cannot move out of a shared reference
-  --> $DIR/issue-113279.rs:17:22
+  --> $DIR/issue-113279.rs:18:22
    |
 LL |         } += match { *"" }.len() {
    |                      ^^^ move occurs because value has type `str`, which does not implement the `Copy` trait
diff --git a/tests/ui/coroutine/issue-44197.rs b/tests/ui/coroutine/issue-44197.rs
index e18bcc2c996..0240f7a7eaa 100644
--- a/tests/ui/coroutine/issue-44197.rs
+++ b/tests/ui/coroutine/issue-44197.rs
@@ -10,7 +10,7 @@ fn foo(_: &str) -> String {
 }
 
 fn bar(baz: String) -> impl Coroutine<(), Yield = String, Return = ()> {
-    move || {
+    #[coroutine] move || {
         yield foo(&baz);
     }
 }
@@ -20,7 +20,7 @@ fn foo2(_: &str) -> Result<String, ()> {
 }
 
 fn bar2(baz: String) -> impl Coroutine<(), Yield = String, Return = ()> {
-    move || {
+    #[coroutine] move || {
         if let Ok(quux) = foo2(&baz) {
             yield quux;
         }
diff --git a/tests/ui/coroutine/issue-45729-unsafe-in-coroutine.rs b/tests/ui/coroutine/issue-45729-unsafe-in-coroutine.rs
index dab9c81bc8f..d90886b6b1d 100644
--- a/tests/ui/coroutine/issue-45729-unsafe-in-coroutine.rs
+++ b/tests/ui/coroutine/issue-45729-unsafe-in-coroutine.rs
@@ -1,7 +1,8 @@
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 fn main() {
-    let _ = || {
+    let _ = #[coroutine]
+    || {
         *(1 as *mut u32) = 42;
         //~^ ERROR dereference of raw pointer is unsafe
         yield;
diff --git a/tests/ui/coroutine/issue-45729-unsafe-in-coroutine.stderr b/tests/ui/coroutine/issue-45729-unsafe-in-coroutine.stderr
index 19949b42939..f99c295bb9e 100644
--- a/tests/ui/coroutine/issue-45729-unsafe-in-coroutine.stderr
+++ b/tests/ui/coroutine/issue-45729-unsafe-in-coroutine.stderr
@@ -1,5 +1,5 @@
 error[E0133]: dereference of raw pointer is unsafe and requires unsafe function or block
-  --> $DIR/issue-45729-unsafe-in-coroutine.rs:5:9
+  --> $DIR/issue-45729-unsafe-in-coroutine.rs:6:9
    |
 LL |         *(1 as *mut u32) = 42;
    |         ^^^^^^^^^^^^^^^^ dereference of raw pointer
diff --git a/tests/ui/coroutine/issue-48048.rs b/tests/ui/coroutine/issue-48048.rs
index b61b7c77072..75664f20198 100644
--- a/tests/ui/coroutine/issue-48048.rs
+++ b/tests/ui/coroutine/issue-48048.rs
@@ -3,7 +3,7 @@
 fn main() {
     let x = (|_| {},);
 
-    || {
+    #[coroutine] || {
         let x = x;
 
         x.0({ //~ ERROR borrow may still be in use when coroutine yields
diff --git a/tests/ui/coroutine/issue-52304.rs b/tests/ui/coroutine/issue-52304.rs
index 01ed181ab1d..552bc0028ee 100644
--- a/tests/ui/coroutine/issue-52304.rs
+++ b/tests/ui/coroutine/issue-52304.rs
@@ -5,6 +5,7 @@
 use std::ops::Coroutine;
 
 pub fn example() -> impl Coroutine {
+    #[coroutine]
     || yield &1
 }
 
diff --git a/tests/ui/coroutine/issue-52398.rs b/tests/ui/coroutine/issue-52398.rs
index 826ce6b9d9b..f8b2faf4eab 100644
--- a/tests/ui/coroutine/issue-52398.rs
+++ b/tests/ui/coroutine/issue-52398.rs
@@ -14,14 +14,14 @@ impl A {
 fn main() {
     // Test that the MIR local with type &A created for the auto-borrow adjustment
     // is caught by typeck
-    move || { //~ WARN unused coroutine that must be used
+    #[coroutine] move || { //~ WARN unused coroutine that must be used
         A.test(yield);
     };
 
     // Test that the std::cell::Ref temporary returned from the `borrow` call
     // is caught by typeck
     let y = RefCell::new(true);
-    static move || { //~ WARN unused coroutine that must be used
+    #[coroutine] static move || { //~ WARN unused coroutine that must be used
         yield *y.borrow();
         return "Done";
     };
diff --git a/tests/ui/coroutine/issue-52398.stderr b/tests/ui/coroutine/issue-52398.stderr
index 18d816da4c6..806690cc332 100644
--- a/tests/ui/coroutine/issue-52398.stderr
+++ b/tests/ui/coroutine/issue-52398.stderr
@@ -1,7 +1,8 @@
 warning: unused coroutine that must be used
-  --> $DIR/issue-52398.rs:17:5
+  --> $DIR/issue-52398.rs:17:18
    |
-LL | /     move || {
+LL |       #[coroutine] move || {
+   |  __________________^
 LL | |         A.test(yield);
 LL | |     };
    | |_____^
@@ -10,9 +11,10 @@ LL | |     };
    = note: `#[warn(unused_must_use)]` on by default
 
 warning: unused coroutine that must be used
-  --> $DIR/issue-52398.rs:24:5
+  --> $DIR/issue-52398.rs:24:18
    |
-LL | /     static move || {
+LL |       #[coroutine] static move || {
+   |  __________________^
 LL | |         yield *y.borrow();
 LL | |         return "Done";
 LL | |     };
diff --git a/tests/ui/coroutine/issue-53548.rs b/tests/ui/coroutine/issue-53548.rs
index 6d55994137f..3b8dff2be28 100644
--- a/tests/ui/coroutine/issue-53548.rs
+++ b/tests/ui/coroutine/issue-53548.rs
@@ -17,7 +17,7 @@
 //
 //@ check-pass
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 use std::cell::RefCell;
 use std::rc::Rc;
@@ -29,7 +29,7 @@ struct Store<C> {
 }
 
 fn main() {
-    Box::new(static move || {
+    Box::new(#[coroutine] static move || {
         let store = Store::<Box<dyn Trait>> {
             inner: Default::default(),
         };
diff --git a/tests/ui/coroutine/issue-57017.rs b/tests/ui/coroutine/issue-57017.rs
index b83d916932a..19cd80ab4a6 100644
--- a/tests/ui/coroutine/issue-57017.rs
+++ b/tests/ui/coroutine/issue-57017.rs
@@ -1,5 +1,5 @@
 //@ build-pass
-#![feature(coroutines, negative_impls)]
+#![feature(coroutines, negative_impls, stmt_expr_attributes)]
 #![allow(dropping_references, dropping_copy_types)]
 
 macro_rules! type_combinations {
@@ -21,7 +21,7 @@ macro_rules! type_combinations {
 
         // This is the same bug as issue 57017, but using yield instead of await
         {
-            let g = move || match drop(&$name::unsync::Client::default()) {
+            let g = #[coroutine] move || match drop(&$name::unsync::Client::default()) {
                 _status => yield,
             };
             assert_send(g);
@@ -30,7 +30,7 @@ macro_rules! type_combinations {
         // This tests that `Client` is properly considered to be dropped after moving it into the
         // function.
         {
-            let g = move || match drop($name::unsend::Client::default()) {
+            let g = #[coroutine] move || match drop($name::unsend::Client::default()) {
                 _status => yield,
             };
             assert_send(g);
diff --git a/tests/ui/coroutine/issue-57084.rs b/tests/ui/coroutine/issue-57084.rs
index 51b0c8e1de9..2df60550e03 100644
--- a/tests/ui/coroutine/issue-57084.rs
+++ b/tests/ui/coroutine/issue-57084.rs
@@ -8,7 +8,7 @@ use std::ops::Coroutine;
 fn with<F>(f: F) -> impl Coroutine<Yield=(), Return=()>
 where F: Fn() -> ()
 {
-    move || {
+    #[coroutine] move || {
         loop {
             match f() {
                 _ => yield,
@@ -19,7 +19,7 @@ where F: Fn() -> ()
 
 fn main() {
     let data = &vec![1];
-    || { //~ WARN unused coroutine that must be used
+    #[coroutine] || { //~ WARN unused coroutine that must be used
         let _to_pin = with(move || println!("{:p}", data));
         loop {
             yield
diff --git a/tests/ui/coroutine/issue-57084.stderr b/tests/ui/coroutine/issue-57084.stderr
index 9f5b79a6ae8..81bd27da919 100644
--- a/tests/ui/coroutine/issue-57084.stderr
+++ b/tests/ui/coroutine/issue-57084.stderr
@@ -1,7 +1,8 @@
 warning: unused coroutine that must be used
-  --> $DIR/issue-57084.rs:22:5
+  --> $DIR/issue-57084.rs:22:18
    |
-LL | /     || {
+LL |       #[coroutine] || {
+   |  __________________^
 LL | |         let _to_pin = with(move || println!("{:p}", data));
 LL | |         loop {
 LL | |             yield
diff --git a/tests/ui/coroutine/issue-57478.rs b/tests/ui/coroutine/issue-57478.rs
index 5e479aaa9c1..494c2ee9843 100644
--- a/tests/ui/coroutine/issue-57478.rs
+++ b/tests/ui/coroutine/issue-57478.rs
@@ -1,16 +1,19 @@
 //@ check-pass
 
-#![feature(negative_impls, coroutines)]
+#![feature(negative_impls, coroutines, stmt_expr_attributes)]
 
 struct Foo;
 impl !Send for Foo {}
 
 fn main() {
-    assert_send(|| {
-        let guard = Foo;
-        drop(guard);
-        yield;
-    })
+    assert_send(
+        #[coroutine]
+        || {
+            let guard = Foo;
+            drop(guard);
+            yield;
+        },
+    )
 }
 
 fn assert_send<T: Send>(_: T) {}
diff --git a/tests/ui/coroutine/issue-58888.rs b/tests/ui/coroutine/issue-58888.rs
index ce45f22dd6e..6266f97ce8c 100644
--- a/tests/ui/coroutine/issue-58888.rs
+++ b/tests/ui/coroutine/issue-58888.rs
@@ -13,7 +13,7 @@ impl Database {
     }
 
     fn check_connection(&self) -> impl Coroutine<Yield = (), Return = ()> + '_ {
-        move || {
+        #[coroutine] move || {
             let iter = self.get_connection();
             for i in iter {
                 yield i
diff --git a/tests/ui/coroutine/issue-61442-stmt-expr-with-drop.rs b/tests/ui/coroutine/issue-61442-stmt-expr-with-drop.rs
index 6280b777201..6f513c250a5 100644
--- a/tests/ui/coroutine/issue-61442-stmt-expr-with-drop.rs
+++ b/tests/ui/coroutine/issue-61442-stmt-expr-with-drop.rs
@@ -4,7 +4,7 @@
 //@ check-pass
 //@ edition:2018
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 
@@ -14,12 +14,14 @@ async fn drop_and_await() {
 }
 
 fn drop_and_yield() {
-    let x = || {
+    let x = #[coroutine]
+    || {
         String::new();
         yield;
     };
     Box::pin(x).as_mut().resume(());
-    let y = static || {
+    let y = #[coroutine]
+    static || {
         String::new();
         yield;
     };
diff --git a/tests/ui/coroutine/issue-64620-yield-array-element.rs b/tests/ui/coroutine/issue-64620-yield-array-element.rs
index a9307d306a6..0d898d014e8 100644
--- a/tests/ui/coroutine/issue-64620-yield-array-element.rs
+++ b/tests/ui/coroutine/issue-64620-yield-array-element.rs
@@ -4,6 +4,7 @@
 
 pub fn crash(arr: [usize; 1]) {
     yield arr[0]; //~ ERROR: yield expression outside of coroutine literal
+    //~^ ERROR: `yield` can only be used in
 }
 
 fn main() {}
diff --git a/tests/ui/coroutine/issue-64620-yield-array-element.stderr b/tests/ui/coroutine/issue-64620-yield-array-element.stderr
index 347532fb719..1c030c5248e 100644
--- a/tests/ui/coroutine/issue-64620-yield-array-element.stderr
+++ b/tests/ui/coroutine/issue-64620-yield-array-element.stderr
@@ -1,9 +1,20 @@
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/issue-64620-yield-array-element.rs:6:5
+   |
+LL |     yield arr[0];
+   |     ^^^^^^^^^^^^
+   |
+help: use `#[coroutine]` to make this closure a coroutine
+   |
+LL | #[coroutine] pub fn crash(arr: [usize; 1]) {
+   | ++++++++++++
+
 error[E0627]: yield expression outside of coroutine literal
   --> $DIR/issue-64620-yield-array-element.rs:6:5
    |
 LL |     yield arr[0];
    |     ^^^^^^^^^^^^
 
-error: aborting due to 1 previous error
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0627`.
diff --git a/tests/ui/coroutine/issue-68112.rs b/tests/ui/coroutine/issue-68112.rs
index ccec2acc976..b296772c905 100644
--- a/tests/ui/coroutine/issue-68112.rs
+++ b/tests/ui/coroutine/issue-68112.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::{
     cell::RefCell,
@@ -30,7 +30,7 @@ fn make_non_send_coroutine() -> impl Coroutine<Return = Arc<RefCell<i32>>> {
 }
 
 fn test1() {
-    let send_gen = || {
+    let send_gen = #[coroutine] || {
         let _non_send_gen = make_non_send_coroutine();
         //~^ NOTE not `Send`
         yield;
@@ -46,7 +46,7 @@ fn test1() {
 pub fn make_gen2<T>(t: T) -> impl Coroutine<Return = T> {
 //~^ NOTE appears within the type
 //~| NOTE expansion of desugaring
-    || { //~ NOTE used within this coroutine
+    #[coroutine] || { //~ NOTE used within this coroutine
         yield;
         t
     }
@@ -57,7 +57,7 @@ fn make_non_send_coroutine2() -> impl Coroutine<Return = Arc<RefCell<i32>>> { //
 }
 
 fn test2() {
-    let send_gen = || { //~ NOTE used within this coroutine
+    let send_gen = #[coroutine] || { //~ NOTE used within this coroutine
         let _non_send_gen = make_non_send_coroutine2();
         yield;
     };
diff --git a/tests/ui/coroutine/issue-68112.stderr b/tests/ui/coroutine/issue-68112.stderr
index 443195d36a3..bcfcb5ec6e6 100644
--- a/tests/ui/coroutine/issue-68112.stderr
+++ b/tests/ui/coroutine/issue-68112.stderr
@@ -4,7 +4,7 @@ error: coroutine cannot be sent between threads safely
 LL |     require_send(send_gen);
    |     ^^^^^^^^^^^^^^^^^^^^^^ coroutine is not `Send`
    |
-   = help: the trait `Sync` is not implemented for `RefCell<i32>`, which is required by `{coroutine@$DIR/issue-68112.rs:33:20: 33:22}: Send`
+   = help: the trait `Sync` is not implemented for `RefCell<i32>`, which is required by `{coroutine@$DIR/issue-68112.rs:33:33: 33:35}: Send`
    = note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` instead
 note: coroutine is not `Send` as this value is used across a yield
   --> $DIR/issue-68112.rs:36:9
@@ -26,14 +26,14 @@ error[E0277]: `RefCell<i32>` cannot be shared between threads safely
 LL |     require_send(send_gen);
    |     ^^^^^^^^^^^^^^^^^^^^^^ `RefCell<i32>` cannot be shared between threads safely
    |
-   = help: the trait `Sync` is not implemented for `RefCell<i32>`, which is required by `{coroutine@$DIR/issue-68112.rs:60:20: 60:22}: Send`
+   = help: the trait `Sync` is not implemented for `RefCell<i32>`, which is required by `{coroutine@$DIR/issue-68112.rs:60:33: 60:35}: Send`
    = note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` instead
    = note: required for `Arc<RefCell<i32>>` to implement `Send`
 note: required because it's used within this coroutine
-  --> $DIR/issue-68112.rs:49:5
+  --> $DIR/issue-68112.rs:49:18
    |
-LL |     || {
-   |     ^^
+LL |     #[coroutine] || {
+   |                  ^^
 note: required because it appears within the type `impl Coroutine<Return = Arc<RefCell<i32>>>`
   --> $DIR/issue-68112.rs:46:30
    |
@@ -45,10 +45,10 @@ note: required because it appears within the type `impl Coroutine<Return = Arc<R
 LL | fn make_non_send_coroutine2() -> impl Coroutine<Return = Arc<RefCell<i32>>> {
    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 note: required because it's used within this coroutine
-  --> $DIR/issue-68112.rs:60:20
+  --> $DIR/issue-68112.rs:60:33
    |
-LL |     let send_gen = || {
-   |                    ^^
+LL |     let send_gen = #[coroutine] || {
+   |                                 ^^
 note: required by a bound in `require_send`
   --> $DIR/issue-68112.rs:22:25
    |
diff --git a/tests/ui/coroutine/issue-69017.rs b/tests/ui/coroutine/issue-69017.rs
index 09bbf63a986..bf69e1dfdb1 100644
--- a/tests/ui/coroutine/issue-69017.rs
+++ b/tests/ui/coroutine/issue-69017.rs
@@ -10,6 +10,7 @@
 use std::ops::Coroutine;
 
 fn gen() -> impl Coroutine<usize> {
+    #[coroutine]
     |_: usize| {
         println!("-> {}", yield);
     }
diff --git a/tests/ui/coroutine/issue-69039.rs b/tests/ui/coroutine/issue-69039.rs
index fd12414c3d8..13cb50e5828 100644
--- a/tests/ui/coroutine/issue-69039.rs
+++ b/tests/ui/coroutine/issue-69039.rs
@@ -9,6 +9,7 @@ fn mkstr(my_name: String, my_mood: String) -> String {
 }
 
 fn my_scenario() -> impl Coroutine<String, Yield = &'static str, Return = String> {
+    #[coroutine]
     |_arg: String| {
         let my_name = yield "What is your name?";
         let my_mood = yield "How are you feeling?";
diff --git a/tests/ui/coroutine/issue-87142.rs b/tests/ui/coroutine/issue-87142.rs
index f5c3805842c..6c22ba3dd75 100644
--- a/tests/ui/coroutine/issue-87142.rs
+++ b/tests/ui/coroutine/issue-87142.rs
@@ -22,6 +22,7 @@ pub struct Context<G: 'static + CoroutineProviderAlt> {
 impl CoroutineProviderAlt for () {
     type Coro = impl Coroutine<(), Return = (), Yield = ()>;
     fn start(ctx: Context<Self>) -> Self::Coro {
+        #[coroutine]
         move || {
             match ctx {
                 _ => (),
diff --git a/tests/ui/coroutine/issue-88653.rs b/tests/ui/coroutine/issue-88653.rs
index ec4c2054758..3afd12a2093 100644
--- a/tests/ui/coroutine/issue-88653.rs
+++ b/tests/ui/coroutine/issue-88653.rs
@@ -11,6 +11,7 @@ fn foo(bar: bool) -> impl Coroutine<(bool,)> {
     //~| NOTE: expected coroutine signature `fn((bool,)) -> _`
     //~| NOTE: in this expansion of desugaring of `impl Trait`
     //~| NOTE: in this expansion of desugaring of `impl Trait`
+    #[coroutine]
     |bar| {
         //~^ NOTE: found signature defined here
         if bar {
diff --git a/tests/ui/coroutine/issue-91477.rs b/tests/ui/coroutine/issue-91477.rs
index c98546f7971..c215fd7948f 100644
--- a/tests/ui/coroutine/issue-91477.rs
+++ b/tests/ui/coroutine/issue-91477.rs
@@ -2,6 +2,7 @@
 
 fn foo() -> impl Sized {
     yield 1; //~ ERROR E0627
+    //~^ ERROR: `yield` can only be used in
 }
 
 fn main() {}
diff --git a/tests/ui/coroutine/issue-91477.stderr b/tests/ui/coroutine/issue-91477.stderr
index ca8e43d8a26..5e2151c4c35 100644
--- a/tests/ui/coroutine/issue-91477.stderr
+++ b/tests/ui/coroutine/issue-91477.stderr
@@ -1,9 +1,20 @@
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/issue-91477.rs:4:5
+   |
+LL |     yield 1;
+   |     ^^^^^^^
+   |
+help: use `#[coroutine]` to make this closure a coroutine
+   |
+LL | #[coroutine] fn foo() -> impl Sized {
+   | ++++++++++++
+
 error[E0627]: yield expression outside of coroutine literal
   --> $DIR/issue-91477.rs:4:5
    |
 LL |     yield 1;
    |     ^^^^^^^
 
-error: aborting due to 1 previous error
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0627`.
diff --git a/tests/ui/coroutine/iterator-count.rs b/tests/ui/coroutine/iterator-count.rs
index bb202ab2d33..1ca8ceaed2a 100644
--- a/tests/ui/coroutine/iterator-count.rs
+++ b/tests/ui/coroutine/iterator-count.rs
@@ -21,6 +21,7 @@ impl<T: Coroutine<(), Return = ()> + Unpin> Iterator for W<T> {
 }
 
 fn test() -> impl Coroutine<(), Return = (), Yield = u8> + Unpin {
+    #[coroutine]
     || {
         for i in 1..6 {
             yield i
@@ -32,6 +33,7 @@ fn main() {
     let end = 11;
 
     let closure_test = |start| {
+        #[coroutine]
         move || {
             for i in start..end {
                 yield i
diff --git a/tests/ui/coroutine/live-upvar-across-yield.rs b/tests/ui/coroutine/live-upvar-across-yield.rs
index 86c4716c951..d13d480dcdc 100644
--- a/tests/ui/coroutine/live-upvar-across-yield.rs
+++ b/tests/ui/coroutine/live-upvar-across-yield.rs
@@ -1,13 +1,13 @@
 //@ run-pass
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 use std::pin::Pin;
 
 fn main() {
     let b = |_| 3;
-    let mut a = || {
+    let mut a = #[coroutine] || {
         b(yield);
     };
     Pin::new(&mut a).resume(());
diff --git a/tests/ui/coroutine/match-bindings.rs b/tests/ui/coroutine/match-bindings.rs
index 9ea1deaab36..2a0cd9af9f3 100644
--- a/tests/ui/coroutine/match-bindings.rs
+++ b/tests/ui/coroutine/match-bindings.rs
@@ -9,7 +9,7 @@ enum Enum {
 }
 
 fn main() {
-    || { //~ WARN unused coroutine that must be used
+    #[coroutine] || { //~ WARN unused coroutine that must be used
         loop {
             if let true = true {
                 match Enum::A(String::new()) {
diff --git a/tests/ui/coroutine/match-bindings.stderr b/tests/ui/coroutine/match-bindings.stderr
index a7aa6eadb95..5525bfed116 100644
--- a/tests/ui/coroutine/match-bindings.stderr
+++ b/tests/ui/coroutine/match-bindings.stderr
@@ -1,7 +1,8 @@
 warning: unused coroutine that must be used
-  --> $DIR/match-bindings.rs:12:5
+  --> $DIR/match-bindings.rs:12:18
    |
-LL | /     || {
+LL |       #[coroutine] || {
+   |  __________________^
 LL | |         loop {
 LL | |             if let true = true {
 LL | |                 match Enum::A(String::new()) {
diff --git a/tests/ui/coroutine/missing_coroutine_attr_suggestion.fixed b/tests/ui/coroutine/missing_coroutine_attr_suggestion.fixed
new file mode 100644
index 00000000000..128f09a1184
--- /dev/null
+++ b/tests/ui/coroutine/missing_coroutine_attr_suggestion.fixed
@@ -0,0 +1,8 @@
+//@ run-rustfix
+
+#![feature(coroutines, gen_blocks, stmt_expr_attributes)]
+
+fn main() {
+    let _ = #[coroutine] || yield;
+    //~^ ERROR `yield` can only be used
+}
diff --git a/tests/ui/coroutine/missing_coroutine_attr_suggestion.rs b/tests/ui/coroutine/missing_coroutine_attr_suggestion.rs
new file mode 100644
index 00000000000..dc952591496
--- /dev/null
+++ b/tests/ui/coroutine/missing_coroutine_attr_suggestion.rs
@@ -0,0 +1,8 @@
+//@ run-rustfix
+
+#![feature(coroutines, gen_blocks, stmt_expr_attributes)]
+
+fn main() {
+    let _ = || yield;
+    //~^ ERROR `yield` can only be used
+}
diff --git a/tests/ui/coroutine/missing_coroutine_attr_suggestion.stderr b/tests/ui/coroutine/missing_coroutine_attr_suggestion.stderr
new file mode 100644
index 00000000000..8d92471a361
--- /dev/null
+++ b/tests/ui/coroutine/missing_coroutine_attr_suggestion.stderr
@@ -0,0 +1,13 @@
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/missing_coroutine_attr_suggestion.rs:6:16
+   |
+LL |     let _ = || yield;
+   |                ^^^^^
+   |
+help: use `#[coroutine]` to make this closure a coroutine
+   |
+LL |     let _ = #[coroutine] || yield;
+   |             ++++++++++++
+
+error: aborting due to 1 previous error
+
diff --git a/tests/ui/coroutine/nested_coroutine.rs b/tests/ui/coroutine/nested_coroutine.rs
index 7ff97abf4bb..2c12ab2adad 100644
--- a/tests/ui/coroutine/nested_coroutine.rs
+++ b/tests/ui/coroutine/nested_coroutine.rs
@@ -1,13 +1,15 @@
 //@ run-pass
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::{Coroutine, CoroutineState};
 use std::pin::Pin;
 
 fn main() {
-    let _coroutine = || {
-        let mut sub_coroutine = || {
+    let _coroutine = #[coroutine]
+    || {
+        let mut sub_coroutine = #[coroutine]
+        || {
             yield 2;
         };
 
diff --git a/tests/ui/coroutine/niche-in-coroutine.rs b/tests/ui/coroutine/niche-in-coroutine.rs
index 45b920ab927..117ee9e6f03 100644
--- a/tests/ui/coroutine/niche-in-coroutine.rs
+++ b/tests/ui/coroutine/niche-in-coroutine.rs
@@ -2,7 +2,7 @@
 
 //@ run-pass
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 use std::mem::size_of_val;
 
@@ -10,7 +10,7 @@ fn take<T>(_: T) {}
 
 fn main() {
     let x = false;
-    let gen1 = || {
+    let gen1 = #[coroutine] || {
         yield;
         take(x);
     };
diff --git a/tests/ui/coroutine/non-static-is-unpin.rs b/tests/ui/coroutine/non-static-is-unpin.rs
index 616a78d5fe2..b28bf197714 100644
--- a/tests/ui/coroutine/non-static-is-unpin.rs
+++ b/tests/ui/coroutine/non-static-is-unpin.rs
@@ -3,7 +3,7 @@
 //@[next] compile-flags: -Znext-solver
 //@ run-pass
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 #![allow(dropping_copy_types)]
 
 use std::marker::PhantomPinned;
@@ -14,7 +14,7 @@ fn assert_unpin<G: Unpin>(_: G) {
 fn main() {
     // Even though this coroutine holds a `PhantomPinned` in its environment, it
     // remains `Unpin`.
-    assert_unpin(|| {
+    assert_unpin(#[coroutine] || {
         let pinned = PhantomPinned;
         yield;
         drop(pinned);
diff --git a/tests/ui/coroutine/not-send-sync.rs b/tests/ui/coroutine/not-send-sync.rs
index dd6182c10de..a46dcd14e88 100644
--- a/tests/ui/coroutine/not-send-sync.rs
+++ b/tests/ui/coroutine/not-send-sync.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![feature(negative_impls)]
 
 struct NotSend;
@@ -11,14 +11,14 @@ fn main() {
     fn assert_sync<T: Sync>(_: T) {}
     fn assert_send<T: Send>(_: T) {}
 
-    assert_sync(|| {
+    assert_sync(#[coroutine] || {
         //~^ ERROR: coroutine cannot be shared between threads safely
         let a = NotSync;
         yield;
         drop(a);
     });
 
-    assert_send(|| {
+    assert_send(#[coroutine] || {
         //~^ ERROR: coroutine cannot be sent between threads safely
         let a = NotSend;
         yield;
diff --git a/tests/ui/coroutine/not-send-sync.stderr b/tests/ui/coroutine/not-send-sync.stderr
index 9228340c710..0f9cbdec130 100644
--- a/tests/ui/coroutine/not-send-sync.stderr
+++ b/tests/ui/coroutine/not-send-sync.stderr
@@ -1,7 +1,7 @@
 error: coroutine cannot be shared between threads safely
   --> $DIR/not-send-sync.rs:14:5
    |
-LL | /     assert_sync(|| {
+LL | /     assert_sync(#[coroutine] || {
 LL | |
 LL | |         let a = NotSync;
 LL | |         yield;
@@ -9,7 +9,7 @@ LL | |         drop(a);
 LL | |     });
    | |______^ coroutine is not `Sync`
    |
-   = help: within `{coroutine@$DIR/not-send-sync.rs:14:17: 14:19}`, the trait `Sync` is not implemented for `NotSync`, which is required by `{coroutine@$DIR/not-send-sync.rs:14:17: 14:19}: Sync`
+   = help: within `{coroutine@$DIR/not-send-sync.rs:14:30: 14:32}`, the trait `Sync` is not implemented for `NotSync`, which is required by `{coroutine@$DIR/not-send-sync.rs:14:30: 14:32}: Sync`
 note: coroutine is not `Sync` as this value is used across a yield
   --> $DIR/not-send-sync.rs:17:9
    |
@@ -26,7 +26,7 @@ LL |     fn assert_sync<T: Sync>(_: T) {}
 error: coroutine cannot be sent between threads safely
   --> $DIR/not-send-sync.rs:21:5
    |
-LL | /     assert_send(|| {
+LL | /     assert_send(#[coroutine] || {
 LL | |
 LL | |         let a = NotSend;
 LL | |         yield;
@@ -34,7 +34,7 @@ LL | |         drop(a);
 LL | |     });
    | |______^ coroutine is not `Send`
    |
-   = help: within `{coroutine@$DIR/not-send-sync.rs:21:17: 21:19}`, the trait `Send` is not implemented for `NotSend`, which is required by `{coroutine@$DIR/not-send-sync.rs:21:17: 21:19}: Send`
+   = help: within `{coroutine@$DIR/not-send-sync.rs:21:30: 21:32}`, the trait `Send` is not implemented for `NotSend`, which is required by `{coroutine@$DIR/not-send-sync.rs:21:30: 21:32}: Send`
 note: coroutine is not `Send` as this value is used across a yield
   --> $DIR/not-send-sync.rs:24:9
    |
diff --git a/tests/ui/coroutine/overlap-locals.rs b/tests/ui/coroutine/overlap-locals.rs
index eea8595ed06..9cfa6e2a76d 100644
--- a/tests/ui/coroutine/overlap-locals.rs
+++ b/tests/ui/coroutine/overlap-locals.rs
@@ -1,9 +1,10 @@
 //@ run-pass
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 fn main() {
-    let a = || {
+    let a = #[coroutine]
+    || {
         {
             let w: i32 = 4;
             yield;
diff --git a/tests/ui/coroutine/panic-drops-resume.rs b/tests/ui/coroutine/panic-drops-resume.rs
index 6d026e6edc8..b23666b7885 100644
--- a/tests/ui/coroutine/panic-drops-resume.rs
+++ b/tests/ui/coroutine/panic-drops-resume.rs
@@ -3,7 +3,7 @@
 //@ run-pass
 //@ needs-unwind
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 use std::panic::{catch_unwind, AssertUnwindSafe};
@@ -21,7 +21,7 @@ impl Drop for Dropper {
 }
 
 fn main() {
-    let mut gen = |_arg| {
+    let mut gen = #[coroutine] |_arg| {
         if true {
             panic!();
         }
diff --git a/tests/ui/coroutine/panic-drops.rs b/tests/ui/coroutine/panic-drops.rs
index c99abdc7246..8c2cf560f2a 100644
--- a/tests/ui/coroutine/panic-drops.rs
+++ b/tests/ui/coroutine/panic-drops.rs
@@ -1,8 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 
-
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 use std::panic;
@@ -25,7 +24,8 @@ fn bool_true() -> bool {
 
 fn main() {
     let b = B;
-    let mut foo = || {
+    let mut foo = #[coroutine]
+    || {
         if bool_true() {
             panic!();
         }
@@ -34,13 +34,12 @@ fn main() {
     };
 
     assert_eq!(A.load(Ordering::SeqCst), 0);
-    let res = panic::catch_unwind(panic::AssertUnwindSafe(|| {
-        Pin::new(&mut foo).resume(())
-    }));
+    let res = panic::catch_unwind(panic::AssertUnwindSafe(|| Pin::new(&mut foo).resume(())));
     assert!(res.is_err());
     assert_eq!(A.load(Ordering::SeqCst), 1);
 
-    let mut foo = || {
+    let mut foo = #[coroutine]
+    || {
         if bool_true() {
             panic!();
         }
@@ -49,9 +48,7 @@ fn main() {
     };
 
     assert_eq!(A.load(Ordering::SeqCst), 1);
-    let res = panic::catch_unwind(panic::AssertUnwindSafe(|| {
-        Pin::new(&mut foo).resume(())
-    }));
+    let res = panic::catch_unwind(panic::AssertUnwindSafe(|| Pin::new(&mut foo).resume(())));
     assert!(res.is_err());
     assert_eq!(A.load(Ordering::SeqCst), 1);
 }
diff --git a/tests/ui/coroutine/panic-safe.rs b/tests/ui/coroutine/panic-safe.rs
index 89dd09bf520..6b9b4cb33c3 100644
--- a/tests/ui/coroutine/panic-safe.rs
+++ b/tests/ui/coroutine/panic-safe.rs
@@ -2,14 +2,14 @@
 //@ needs-unwind
 
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 use std::pin::Pin;
 use std::panic;
 
 fn main() {
-    let mut foo = || {
+    let mut foo = #[coroutine] || {
         if true {
             panic!();
         }
diff --git a/tests/ui/coroutine/parent-expression.rs b/tests/ui/coroutine/parent-expression.rs
index 4d40192c07a..0f4d99c8936 100644
--- a/tests/ui/coroutine/parent-expression.rs
+++ b/tests/ui/coroutine/parent-expression.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines, negative_impls, rustc_attrs)]
+#![feature(coroutines, negative_impls, rustc_attrs, stmt_expr_attributes)]
 
 macro_rules! type_combinations {
     (
@@ -14,7 +14,7 @@ macro_rules! type_combinations {
         // Struct update syntax. This fails because the Client used in the update is considered
         // dropped *after* the yield.
         {
-            let g = move || match drop($name::Client { ..$name::Client::default() }) {
+            let g = #[coroutine] move || match drop($name::Client { ..$name::Client::default() }) {
             //~^ `significant_drop::Client` which is not `Send`
             //~| `insignificant_dtor::Client` which is not `Send`
             //~| `derived_drop::Client` which is not `Send`
@@ -29,7 +29,7 @@ macro_rules! type_combinations {
         // Simple owned value. This works because the Client is considered moved into `drop`,
         // even though the temporary expression doesn't end until after the yield.
         {
-            let g = move || match drop($name::Client::default()) {
+            let g = #[coroutine] move || match drop($name::Client::default()) {
                 _ => yield,
             };
             assert_send(g);
diff --git a/tests/ui/coroutine/parent-expression.stderr b/tests/ui/coroutine/parent-expression.stderr
index 5b3737069e6..2d817f1bfd9 100644
--- a/tests/ui/coroutine/parent-expression.stderr
+++ b/tests/ui/coroutine/parent-expression.stderr
@@ -13,12 +13,12 @@ LL | |         };
 LL | |     );
    | |_____- in this macro invocation
    |
-   = help: within `{coroutine@$DIR/parent-expression.rs:17:21: 17:28}`, the trait `Send` is not implemented for `derived_drop::Client`, which is required by `{coroutine@$DIR/parent-expression.rs:17:21: 17:28}: Send`
+   = help: within `{coroutine@$DIR/parent-expression.rs:17:34: 17:41}`, the trait `Send` is not implemented for `derived_drop::Client`, which is required by `{coroutine@$DIR/parent-expression.rs:17:34: 17:41}: Send`
 note: coroutine is not `Send` as this value is used across a yield
   --> $DIR/parent-expression.rs:21:22
    |
-LL |               let g = move || match drop($name::Client { ..$name::Client::default() }) {
-   |                                                            ------------------------ has type `derived_drop::Client` which is not `Send`
+LL |               let g = #[coroutine] move || match drop($name::Client { ..$name::Client::default() }) {
+   |                                                                         ------------------------ has type `derived_drop::Client` which is not `Send`
 ...
 LL |                   _ => yield,
    |                        ^^^^^ yield occurs here, with `$name::Client::default()` maybe used later
@@ -53,12 +53,12 @@ LL | |         };
 LL | |     );
    | |_____- in this macro invocation
    |
-   = help: within `{coroutine@$DIR/parent-expression.rs:17:21: 17:28}`, the trait `Send` is not implemented for `significant_drop::Client`, which is required by `{coroutine@$DIR/parent-expression.rs:17:21: 17:28}: Send`
+   = help: within `{coroutine@$DIR/parent-expression.rs:17:34: 17:41}`, the trait `Send` is not implemented for `significant_drop::Client`, which is required by `{coroutine@$DIR/parent-expression.rs:17:34: 17:41}: Send`
 note: coroutine is not `Send` as this value is used across a yield
   --> $DIR/parent-expression.rs:21:22
    |
-LL |               let g = move || match drop($name::Client { ..$name::Client::default() }) {
-   |                                                            ------------------------ has type `significant_drop::Client` which is not `Send`
+LL |               let g = #[coroutine] move || match drop($name::Client { ..$name::Client::default() }) {
+   |                                                                         ------------------------ has type `significant_drop::Client` which is not `Send`
 ...
 LL |                   _ => yield,
    |                        ^^^^^ yield occurs here, with `$name::Client::default()` maybe used later
@@ -93,12 +93,12 @@ LL | |         };
 LL | |     );
    | |_____- in this macro invocation
    |
-   = help: within `{coroutine@$DIR/parent-expression.rs:17:21: 17:28}`, the trait `Send` is not implemented for `insignificant_dtor::Client`, which is required by `{coroutine@$DIR/parent-expression.rs:17:21: 17:28}: Send`
+   = help: within `{coroutine@$DIR/parent-expression.rs:17:34: 17:41}`, the trait `Send` is not implemented for `insignificant_dtor::Client`, which is required by `{coroutine@$DIR/parent-expression.rs:17:34: 17:41}: Send`
 note: coroutine is not `Send` as this value is used across a yield
   --> $DIR/parent-expression.rs:21:22
    |
-LL |               let g = move || match drop($name::Client { ..$name::Client::default() }) {
-   |                                                            ------------------------ has type `insignificant_dtor::Client` which is not `Send`
+LL |               let g = #[coroutine] move || match drop($name::Client { ..$name::Client::default() }) {
+   |                                                                         ------------------------ has type `insignificant_dtor::Client` which is not `Send`
 ...
 LL |                   _ => yield,
    |                        ^^^^^ yield occurs here, with `$name::Client::default()` maybe used later
diff --git a/tests/ui/coroutine/partial-drop.rs b/tests/ui/coroutine/partial-drop.rs
index ba13544712f..9efb551c9c1 100644
--- a/tests/ui/coroutine/partial-drop.rs
+++ b/tests/ui/coroutine/partial-drop.rs
@@ -1,5 +1,5 @@
 //@ check-pass
-#![feature(negative_impls, coroutines)]
+#![feature(negative_impls, coroutines, stmt_expr_attributes)]
 
 struct Foo;
 impl !Send for Foo {}
@@ -10,25 +10,34 @@ struct Bar {
 }
 
 fn main() {
-    assert_send(|| {
-        let guard = Bar { foo: Foo, x: 42 };
-        drop(guard.foo);
-        yield;
-    });
+    assert_send(
+        #[coroutine]
+        || {
+            let guard = Bar { foo: Foo, x: 42 };
+            drop(guard.foo);
+            yield;
+        },
+    );
 
-    assert_send(|| {
-        let mut guard = Bar { foo: Foo, x: 42 };
-        drop(guard);
-        guard = Bar { foo: Foo, x: 23 };
-        yield;
-    });
+    assert_send(
+        #[coroutine]
+        || {
+            let mut guard = Bar { foo: Foo, x: 42 };
+            drop(guard);
+            guard = Bar { foo: Foo, x: 23 };
+            yield;
+        },
+    );
 
-    assert_send(|| {
-        let guard = Bar { foo: Foo, x: 42 };
-        let Bar { foo, x } = guard;
-        drop(foo);
-        yield;
-    });
+    assert_send(
+        #[coroutine]
+        || {
+            let guard = Bar { foo: Foo, x: 42 };
+            let Bar { foo, x } = guard;
+            drop(foo);
+            yield;
+        },
+    );
 }
 
 fn assert_send<T: Send>(_: T) {}
diff --git a/tests/ui/coroutine/partial-initialization-across-yield.rs b/tests/ui/coroutine/partial-initialization-across-yield.rs
index 75ad5a22804..ab6f9c5b1e9 100644
--- a/tests/ui/coroutine/partial-initialization-across-yield.rs
+++ b/tests/ui/coroutine/partial-initialization-across-yield.rs
@@ -1,13 +1,13 @@
 // Test that we don't allow yielding from a coroutine while a local is partially
 // initialized.
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 struct S { x: i32, y: i32 }
 struct T(i32, i32);
 
 fn test_tuple() {
-    let _ = || {
+    let _ = #[coroutine] || {
         let mut t: (i32, i32);
         t.0 = 42; //~ ERROR E0381
         yield;
@@ -17,7 +17,7 @@ fn test_tuple() {
 }
 
 fn test_tuple_struct() {
-    let _ = || {
+    let _ = #[coroutine] || {
         let mut t: T;
         t.0 = 42; //~ ERROR E0381
         yield;
@@ -27,7 +27,7 @@ fn test_tuple_struct() {
 }
 
 fn test_struct() {
-    let _ = || {
+    let _ = #[coroutine] || {
         let mut t: S;
         t.x = 42; //~ ERROR E0381
         yield;
diff --git a/tests/ui/coroutine/pattern-borrow.rs b/tests/ui/coroutine/pattern-borrow.rs
index 76084433d47..46547504abc 100644
--- a/tests/ui/coroutine/pattern-borrow.rs
+++ b/tests/ui/coroutine/pattern-borrow.rs
@@ -5,7 +5,7 @@ enum Test { A(i32), B, }
 fn main() { }
 
 fn fun(test: Test) {
-    move || {
+    #[coroutine] move || {
         if let Test::A(ref _a) = test { //~ ERROR borrow may still be in use when coroutine yields
             yield ();
             _a.use_ref();
diff --git a/tests/ui/coroutine/pin-box-coroutine.rs b/tests/ui/coroutine/pin-box-coroutine.rs
index 1ee6393d1d8..d030f3ef214 100644
--- a/tests/ui/coroutine/pin-box-coroutine.rs
+++ b/tests/ui/coroutine/pin-box-coroutine.rs
@@ -1,6 +1,6 @@
 //@ run-pass
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 
@@ -8,6 +8,6 @@ fn assert_coroutine<G: Coroutine>(_: G) {
 }
 
 fn main() {
-    assert_coroutine(static || yield);
-    assert_coroutine(Box::pin(static || yield));
+    assert_coroutine(#[coroutine] static || yield);
+    assert_coroutine(Box::pin(#[coroutine] static || yield));
 }
diff --git a/tests/ui/coroutine/polymorphize-args.rs b/tests/ui/coroutine/polymorphize-args.rs
index 21aa3c7aafd..5123bf412b5 100644
--- a/tests/ui/coroutine/polymorphize-args.rs
+++ b/tests/ui/coroutine/polymorphize-args.rs
@@ -1,14 +1,15 @@
 //@ compile-flags: -Zpolymorphize=on
 //@ build-pass
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 use std::pin::Pin;
 use std::thread;
 
 fn main() {
-    let mut foo = || yield;
+    let mut foo = #[coroutine]
+    || yield;
     thread::spawn(move || match Pin::new(&mut foo).resume(()) {
         s => panic!("bad state: {:?}", s),
     })
diff --git a/tests/ui/coroutine/print/coroutine-print-verbose-1.rs b/tests/ui/coroutine/print/coroutine-print-verbose-1.rs
index 73106328618..dc0165c9194 100644
--- a/tests/ui/coroutine/print/coroutine-print-verbose-1.rs
+++ b/tests/ui/coroutine/print/coroutine-print-verbose-1.rs
@@ -2,7 +2,7 @@
 
 // Same as: tests/ui/coroutine/issue-68112.stderr
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::{
     cell::RefCell,
@@ -30,7 +30,7 @@ fn make_non_send_coroutine() -> impl Coroutine<Return = Arc<RefCell<i32>>> {
 }
 
 fn test1() {
-    let send_gen = || {
+    let send_gen = #[coroutine] || {
         let _non_send_gen = make_non_send_coroutine();
         yield;
     };
@@ -39,7 +39,7 @@ fn test1() {
 }
 
 pub fn make_gen2<T>(t: T) -> impl Coroutine<Return = T> {
-    || {
+    #[coroutine] || {
         yield;
         t
     }
@@ -49,7 +49,7 @@ fn make_non_send_coroutine2() -> impl Coroutine<Return = Arc<RefCell<i32>>> {
 }
 
 fn test2() {
-    let send_gen = || {
+    let send_gen = #[coroutine] || {
         let _non_send_gen = make_non_send_coroutine2();
         yield;
     };
diff --git a/tests/ui/coroutine/print/coroutine-print-verbose-1.stderr b/tests/ui/coroutine/print/coroutine-print-verbose-1.stderr
index 37db83d57f7..934ab08cf17 100644
--- a/tests/ui/coroutine/print/coroutine-print-verbose-1.stderr
+++ b/tests/ui/coroutine/print/coroutine-print-verbose-1.stderr
@@ -29,10 +29,10 @@ LL |     require_send(send_gen);
    = note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` instead
    = note: required for `Arc<RefCell<i32>>` to implement `Send`
 note: required because it's used within this coroutine
-  --> $DIR/coroutine-print-verbose-1.rs:42:5
+  --> $DIR/coroutine-print-verbose-1.rs:42:18
    |
-LL |     || {
-   |     ^^
+LL |     #[coroutine] || {
+   |                  ^^
 note: required because it appears within the type `Opaque(DefId(0:35 ~ coroutine_print_verbose_1[75fb]::make_gen2::{opaque#0}), [Arc<RefCell<i32>>])`
   --> $DIR/coroutine-print-verbose-1.rs:41:30
    |
@@ -44,10 +44,10 @@ note: required because it appears within the type `Opaque(DefId(0:36 ~ coroutine
 LL | fn make_non_send_coroutine2() -> impl Coroutine<Return = Arc<RefCell<i32>>> {
    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 note: required because it's used within this coroutine
-  --> $DIR/coroutine-print-verbose-1.rs:52:20
+  --> $DIR/coroutine-print-verbose-1.rs:52:33
    |
-LL |     let send_gen = || {
-   |                    ^^
+LL |     let send_gen = #[coroutine] || {
+   |                                 ^^
 note: required by a bound in `require_send`
   --> $DIR/coroutine-print-verbose-1.rs:26:25
    |
diff --git a/tests/ui/coroutine/print/coroutine-print-verbose-2.rs b/tests/ui/coroutine/print/coroutine-print-verbose-2.rs
index f9ea68a8cd9..ef7199cafdd 100644
--- a/tests/ui/coroutine/print/coroutine-print-verbose-2.rs
+++ b/tests/ui/coroutine/print/coroutine-print-verbose-2.rs
@@ -1,7 +1,7 @@
 //@ compile-flags: -Zverbose-internals
 
 // Same as test/ui/coroutine/not-send-sync.rs
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![feature(negative_impls)]
 
 struct NotSend;
@@ -14,14 +14,14 @@ fn main() {
     fn assert_sync<T: Sync>(_: T) {}
     fn assert_send<T: Send>(_: T) {}
 
-    assert_sync(|| {
+    assert_sync(#[coroutine] || {
         //~^ ERROR: coroutine cannot be shared between threads safely
         let a = NotSync;
         yield;
         drop(a);
     });
 
-    assert_send(|| {
+    assert_send(#[coroutine] || {
         //~^ ERROR: coroutine cannot be sent between threads safely
         let a = NotSend;
         yield;
diff --git a/tests/ui/coroutine/print/coroutine-print-verbose-2.stderr b/tests/ui/coroutine/print/coroutine-print-verbose-2.stderr
index 26c9c27743c..0de53d9e1d7 100644
--- a/tests/ui/coroutine/print/coroutine-print-verbose-2.stderr
+++ b/tests/ui/coroutine/print/coroutine-print-verbose-2.stderr
@@ -1,7 +1,7 @@
 error: coroutine cannot be shared between threads safely
   --> $DIR/coroutine-print-verbose-2.rs:17:5
    |
-LL | /     assert_sync(|| {
+LL | /     assert_sync(#[coroutine] || {
 LL | |
 LL | |         let a = NotSync;
 LL | |         yield;
@@ -26,7 +26,7 @@ LL |     fn assert_sync<T: Sync>(_: T) {}
 error: coroutine cannot be sent between threads safely
   --> $DIR/coroutine-print-verbose-2.rs:24:5
    |
-LL | /     assert_send(|| {
+LL | /     assert_send(#[coroutine] || {
 LL | |
 LL | |         let a = NotSend;
 LL | |         yield;
diff --git a/tests/ui/coroutine/print/coroutine-print-verbose-3.rs b/tests/ui/coroutine/print/coroutine-print-verbose-3.rs
index be6dbad9e1c..5dd15fc1b95 100644
--- a/tests/ui/coroutine/print/coroutine-print-verbose-3.rs
+++ b/tests/ui/coroutine/print/coroutine-print-verbose-3.rs
@@ -1,12 +1,13 @@
 //@ compile-flags: -Zverbose-internals
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 fn main() {
     let x = "Type mismatch test";
-    let coroutine :() = || {
-    //~^ ERROR mismatched types
+    let coroutine: () = #[coroutine]
+    || {
+        //~^ ERROR mismatched types
         yield 1i32;
-        return x
+        return x;
     };
 }
diff --git a/tests/ui/coroutine/print/coroutine-print-verbose-3.stderr b/tests/ui/coroutine/print/coroutine-print-verbose-3.stderr
index e2973cde6d3..dce45aeae56 100644
--- a/tests/ui/coroutine/print/coroutine-print-verbose-3.stderr
+++ b/tests/ui/coroutine/print/coroutine-print-verbose-3.stderr
@@ -1,13 +1,12 @@
 error[E0308]: mismatched types
-  --> $DIR/coroutine-print-verbose-3.rs:7:25
+  --> $DIR/coroutine-print-verbose-3.rs:8:5
    |
-LL |       let coroutine :() = || {
-   |  ____________________--___^
-   | |                    |
-   | |                    expected due to this
+LL |       let coroutine: () = #[coroutine]
+   |                      -- expected due to this
+LL | /     || {
 LL | |
 LL | |         yield 1i32;
-LL | |         return x
+LL | |         return x;
 LL | |     };
    | |_____^ expected `()`, found coroutine
    |
diff --git a/tests/ui/coroutine/reborrow-mut-upvar.rs b/tests/ui/coroutine/reborrow-mut-upvar.rs
index e1f6211baeb..716781e365c 100644
--- a/tests/ui/coroutine/reborrow-mut-upvar.rs
+++ b/tests/ui/coroutine/reborrow-mut-upvar.rs
@@ -3,7 +3,7 @@
 #![feature(coroutines)]
 
 fn _run(bar: &mut i32) {
-    || { //~ WARN unused coroutine that must be used
+    #[coroutine] || { //~ WARN unused coroutine that must be used
         {
             let _baz = &*bar;
             yield;
diff --git a/tests/ui/coroutine/reborrow-mut-upvar.stderr b/tests/ui/coroutine/reborrow-mut-upvar.stderr
index 5b614ac4be8..a05e84c5f3e 100644
--- a/tests/ui/coroutine/reborrow-mut-upvar.stderr
+++ b/tests/ui/coroutine/reborrow-mut-upvar.stderr
@@ -1,7 +1,8 @@
 warning: unused coroutine that must be used
-  --> $DIR/reborrow-mut-upvar.rs:6:5
+  --> $DIR/reborrow-mut-upvar.rs:6:18
    |
-LL | /     || {
+LL |       #[coroutine] || {
+   |  __________________^
 LL | |         {
 LL | |             let _baz = &*bar;
 LL | |             yield;
diff --git a/tests/ui/coroutine/ref-escapes-but-not-over-yield.rs b/tests/ui/coroutine/ref-escapes-but-not-over-yield.rs
index a9c13188ff3..0f9c56786da 100644
--- a/tests/ui/coroutine/ref-escapes-but-not-over-yield.rs
+++ b/tests/ui/coroutine/ref-escapes-but-not-over-yield.rs
@@ -1,16 +1,17 @@
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 fn foo(x: &i32) {
     // In this case, a reference to `b` escapes the coroutine, but not
     // because of a yield. We see that there is no yield in the scope of
     // `b` and give the more generic error message.
     let mut a = &3;
-    let mut b = move || {
-        yield();
+    let mut b = #[coroutine]
+    move || {
+        yield ();
         let b = 5;
         a = &b;
         //~^ ERROR borrowed data escapes outside of coroutine
     };
 }
 
-fn main() { }
+fn main() {}
diff --git a/tests/ui/coroutine/ref-escapes-but-not-over-yield.stderr b/tests/ui/coroutine/ref-escapes-but-not-over-yield.stderr
index 8811faf2fad..6fa7082c0b8 100644
--- a/tests/ui/coroutine/ref-escapes-but-not-over-yield.stderr
+++ b/tests/ui/coroutine/ref-escapes-but-not-over-yield.stderr
@@ -1,5 +1,5 @@
 error[E0521]: borrowed data escapes outside of coroutine
-  --> $DIR/ref-escapes-but-not-over-yield.rs:11:9
+  --> $DIR/ref-escapes-but-not-over-yield.rs:12:9
    |
 LL |     let mut a = &3;
    |         ----- `a` declared here, outside of the coroutine body
diff --git a/tests/ui/coroutine/ref-upvar-not-send.rs b/tests/ui/coroutine/ref-upvar-not-send.rs
index 487fdeea2da..89bb5e5495f 100644
--- a/tests/ui/coroutine/ref-upvar-not-send.rs
+++ b/tests/ui/coroutine/ref-upvar-not-send.rs
@@ -1,7 +1,7 @@
 // For `Send` coroutines, suggest a `T: Sync` requirement for `&T` upvars,
 // and suggest a `T: Send` requirement for `&mut T` upvars.
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 fn assert_send<T: Send>(_: T) {}
 //~^ NOTE required by a bound in `assert_send`
@@ -12,7 +12,7 @@ fn assert_send<T: Send>(_: T) {}
 fn main() {
     let x: &*mut () = &std::ptr::null_mut();
     let y: &mut *mut () = &mut std::ptr::null_mut();
-    assert_send(move || {
+    assert_send(#[coroutine] move || {
         //~^ ERROR coroutine cannot be sent between threads safely
         //~| NOTE coroutine is not `Send`
         yield;
@@ -20,7 +20,7 @@ fn main() {
     });
     //~^^ NOTE captured value is not `Send` because `&` references cannot be sent unless their referent is `Sync`
     //~| NOTE has type `&*mut ()` which is not `Send`, because `*mut ()` is not `Sync`
-    assert_send(move || {
+    assert_send(#[coroutine] move || {
         //~^ ERROR coroutine cannot be sent between threads safely
         //~| NOTE coroutine is not `Send`
         yield;
diff --git a/tests/ui/coroutine/ref-upvar-not-send.stderr b/tests/ui/coroutine/ref-upvar-not-send.stderr
index 0f91bcf4053..4c7deab3f4c 100644
--- a/tests/ui/coroutine/ref-upvar-not-send.stderr
+++ b/tests/ui/coroutine/ref-upvar-not-send.stderr
@@ -1,8 +1,8 @@
 error: coroutine cannot be sent between threads safely
-  --> $DIR/ref-upvar-not-send.rs:15:17
+  --> $DIR/ref-upvar-not-send.rs:15:30
    |
-LL |       assert_send(move || {
-   |  _________________^
+LL |       assert_send(#[coroutine] move || {
+   |  ______________________________^
 LL | |
 LL | |
 LL | |         yield;
@@ -10,7 +10,7 @@ LL | |         let _x = x;
 LL | |     });
    | |_____^ coroutine is not `Send`
    |
-   = help: the trait `Sync` is not implemented for `*mut ()`, which is required by `{coroutine@$DIR/ref-upvar-not-send.rs:15:17: 15:24}: Send`
+   = help: the trait `Sync` is not implemented for `*mut ()`, which is required by `{coroutine@$DIR/ref-upvar-not-send.rs:15:30: 15:37}: Send`
 note: captured value is not `Send` because `&` references cannot be sent unless their referent is `Sync`
   --> $DIR/ref-upvar-not-send.rs:19:18
    |
@@ -23,10 +23,10 @@ LL | fn assert_send<T: Send>(_: T) {}
    |                   ^^^^ required by this bound in `assert_send`
 
 error: coroutine cannot be sent between threads safely
-  --> $DIR/ref-upvar-not-send.rs:23:17
+  --> $DIR/ref-upvar-not-send.rs:23:30
    |
-LL |       assert_send(move || {
-   |  _________________^
+LL |       assert_send(#[coroutine] move || {
+   |  ______________________________^
 LL | |
 LL | |
 LL | |         yield;
@@ -34,7 +34,7 @@ LL | |         let _y = y;
 LL | |     });
    | |_____^ coroutine is not `Send`
    |
-   = help: within `{coroutine@$DIR/ref-upvar-not-send.rs:23:17: 23:24}`, the trait `Send` is not implemented for `*mut ()`, which is required by `{coroutine@$DIR/ref-upvar-not-send.rs:23:17: 23:24}: Send`
+   = help: within `{coroutine@$DIR/ref-upvar-not-send.rs:23:30: 23:37}`, the trait `Send` is not implemented for `*mut ()`, which is required by `{coroutine@$DIR/ref-upvar-not-send.rs:23:30: 23:37}: Send`
 note: captured value is not `Send` because `&mut` references cannot be sent unless their referent is `Send`
   --> $DIR/ref-upvar-not-send.rs:27:18
    |
diff --git a/tests/ui/coroutine/reinit-in-match-guard.rs b/tests/ui/coroutine/reinit-in-match-guard.rs
index 4a584204773..0a97d9fbcb2 100644
--- a/tests/ui/coroutine/reinit-in-match-guard.rs
+++ b/tests/ui/coroutine/reinit-in-match-guard.rs
@@ -1,11 +1,11 @@
 //@ build-pass
 
-#![feature(coroutines)]
-
+#![feature(coroutines, stmt_expr_attributes)]
 #![allow(unused_assignments, dead_code)]
 
 fn main() {
-    let _ = || {
+    let _ = #[coroutine]
+    || {
         let mut x = vec![22_usize];
         std::mem::drop(x);
         match y() {
diff --git a/tests/ui/coroutine/resume-after-return.rs b/tests/ui/coroutine/resume-after-return.rs
index 81f86de641f..7028e1e81e5 100644
--- a/tests/ui/coroutine/resume-after-return.rs
+++ b/tests/ui/coroutine/resume-after-return.rs
@@ -1,17 +1,17 @@
 //@ run-pass
 //@ needs-unwind
 
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
-#![feature(coroutines, coroutine_trait)]
-
-use std::ops::{CoroutineState, Coroutine};
-use std::pin::Pin;
+use std::ops::{Coroutine, CoroutineState};
 use std::panic;
+use std::pin::Pin;
 
 fn main() {
-    let mut foo = || {
+    let mut foo = #[coroutine]
+    || {
         if true {
-            return
+            return;
         }
         yield;
     };
diff --git a/tests/ui/coroutine/resume-arg-late-bound.rs b/tests/ui/coroutine/resume-arg-late-bound.rs
index 3c2ab41047e..e84184da631 100644
--- a/tests/ui/coroutine/resume-arg-late-bound.rs
+++ b/tests/ui/coroutine/resume-arg-late-bound.rs
@@ -1,14 +1,14 @@
 //! Tests that we cannot produce a coroutine that accepts a resume argument
 //! with any lifetime and then stores it across a `yield`.
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 
 fn test(a: impl for<'a> Coroutine<&'a mut bool>) {}
 
 fn main() {
-    let gen = |arg: &mut bool| {
+    let gen = #[coroutine] |arg: &mut bool| {
         yield ();
         *arg = true;
     };
diff --git a/tests/ui/coroutine/resume-arg-late-bound.stderr b/tests/ui/coroutine/resume-arg-late-bound.stderr
index 4a4ee08c529..646abaf4f7b 100644
--- a/tests/ui/coroutine/resume-arg-late-bound.stderr
+++ b/tests/ui/coroutine/resume-arg-late-bound.stderr
@@ -4,7 +4,7 @@ error: implementation of `Coroutine` is not general enough
 LL |     test(gen);
    |     ^^^^^^^^^ implementation of `Coroutine` is not general enough
    |
-   = note: `{coroutine@$DIR/resume-arg-late-bound.rs:11:15: 11:31}` must implement `Coroutine<&'1 mut bool>`, for any lifetime `'1`...
+   = note: `{coroutine@$DIR/resume-arg-late-bound.rs:11:28: 11:44}` must implement `Coroutine<&'1 mut bool>`, for any lifetime `'1`...
    = note: ...but it actually implements `Coroutine<&'2 mut bool>`, for some specific lifetime `'2`
 
 error: aborting due to 1 previous error
diff --git a/tests/ui/coroutine/resume-arg-size.rs b/tests/ui/coroutine/resume-arg-size.rs
index 81e96975c98..59740a28f42 100644
--- a/tests/ui/coroutine/resume-arg-size.rs
+++ b/tests/ui/coroutine/resume-arg-size.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![allow(dropping_copy_types)]
 
 //@ run-pass
@@ -7,7 +7,8 @@ use std::mem::size_of_val;
 
 fn main() {
     // Coroutine taking a `Copy`able resume arg.
-    let gen_copy = |mut x: usize| {
+    let gen_copy = #[coroutine]
+    |mut x: usize| {
         loop {
             drop(x);
             x = yield;
@@ -15,7 +16,8 @@ fn main() {
     };
 
     // Coroutine taking a non-`Copy` resume arg.
-    let gen_move = |mut x: Box<usize>| {
+    let gen_move = #[coroutine]
+    |mut x: Box<usize>| {
         loop {
             drop(x);
             x = yield;
diff --git a/tests/ui/coroutine/resume-live-across-yield.rs b/tests/ui/coroutine/resume-live-across-yield.rs
index 45851411daa..b67619ee70f 100644
--- a/tests/ui/coroutine/resume-live-across-yield.rs
+++ b/tests/ui/coroutine/resume-live-across-yield.rs
@@ -1,6 +1,6 @@
 //@ run-pass
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::{Coroutine, CoroutineState};
 use std::pin::Pin;
@@ -18,7 +18,8 @@ impl Drop for Dropper {
 }
 
 fn main() {
-    let mut g = |mut _d| {
+    let mut g = #[coroutine]
+    |mut _d| {
         _d = yield;
         _d
     };
diff --git a/tests/ui/coroutine/retain-resume-ref.rs b/tests/ui/coroutine/retain-resume-ref.rs
index c9f995ab0cf..6e688c33979 100644
--- a/tests/ui/coroutine/retain-resume-ref.rs
+++ b/tests/ui/coroutine/retain-resume-ref.rs
@@ -1,6 +1,6 @@
 //! This test ensures that a mutable reference cannot be passed as a resume argument twice.
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::marker::Unpin;
 use std::ops::{
@@ -12,7 +12,8 @@ use std::pin::Pin;
 fn main() {
     let mut thing = String::from("hello");
 
-    let mut gen = |r| {
+    let mut gen = #[coroutine]
+    |r| {
         if false {
             yield r;
         }
diff --git a/tests/ui/coroutine/retain-resume-ref.stderr b/tests/ui/coroutine/retain-resume-ref.stderr
index eb8b78df6c9..e23023c6e23 100644
--- a/tests/ui/coroutine/retain-resume-ref.stderr
+++ b/tests/ui/coroutine/retain-resume-ref.stderr
@@ -1,5 +1,5 @@
 error[E0499]: cannot borrow `thing` as mutable more than once at a time
-  --> $DIR/retain-resume-ref.rs:23:25
+  --> $DIR/retain-resume-ref.rs:24:25
    |
 LL |     gen.as_mut().resume(&mut thing);
    |                         ---------- first mutable borrow occurs here
diff --git a/tests/ui/coroutine/size-moved-locals.rs b/tests/ui/coroutine/size-moved-locals.rs
index eb5210087a0..0f800de8454 100644
--- a/tests/ui/coroutine/size-moved-locals.rs
+++ b/tests/ui/coroutine/size-moved-locals.rs
@@ -24,6 +24,7 @@ impl Drop for Foo {
 }
 
 fn move_before_yield() -> impl Coroutine<Yield = (), Return = ()> {
+    #[coroutine]
     static || {
         let first = Foo([0; FOO_SIZE]);
         let _second = first;
@@ -35,6 +36,7 @@ fn move_before_yield() -> impl Coroutine<Yield = (), Return = ()> {
 fn noop() {}
 
 fn move_before_yield_with_noop() -> impl Coroutine<Yield = (), Return = ()> {
+    #[coroutine]
     static || {
         let first = Foo([0; FOO_SIZE]);
         noop();
@@ -47,6 +49,7 @@ fn move_before_yield_with_noop() -> impl Coroutine<Yield = (), Return = ()> {
 // Today we don't have NRVO (we allocate space for both `first` and `second`,)
 // but we can overlap `first` with `_third`.
 fn overlap_move_points() -> impl Coroutine<Yield = (), Return = ()> {
+    #[coroutine]
     static || {
         let first = Foo([0; FOO_SIZE]);
         yield;
@@ -58,6 +61,7 @@ fn overlap_move_points() -> impl Coroutine<Yield = (), Return = ()> {
 }
 
 fn overlap_x_and_y() -> impl Coroutine<Yield = (), Return = ()> {
+    #[coroutine]
     static || {
         let x = Foo([0; FOO_SIZE]);
         yield;
diff --git a/tests/ui/coroutine/sized-yield.rs b/tests/ui/coroutine/sized-yield.rs
index 1368c88b522..a4c91fafe6c 100644
--- a/tests/ui/coroutine/sized-yield.rs
+++ b/tests/ui/coroutine/sized-yield.rs
@@ -1,11 +1,12 @@
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 use std::pin::Pin;
 
 fn main() {
     let s = String::from("foo");
-    let mut gen = move || {
+    let mut gen = #[coroutine]
+    move || {
         //~^ ERROR the size for values of type
         yield s[..];
     };
diff --git a/tests/ui/coroutine/sized-yield.stderr b/tests/ui/coroutine/sized-yield.stderr
index 4e8dc13201d..5d5dd6803c8 100644
--- a/tests/ui/coroutine/sized-yield.stderr
+++ b/tests/ui/coroutine/sized-yield.stderr
@@ -1,8 +1,7 @@
 error[E0277]: the size for values of type `str` cannot be known at compilation time
-  --> $DIR/sized-yield.rs:8:19
+  --> $DIR/sized-yield.rs:9:5
    |
-LL |       let mut gen = move || {
-   |  ___________________^
+LL | /     move || {
 LL | |
 LL | |         yield s[..];
 LL | |     };
@@ -12,7 +11,7 @@ LL | |     };
    = note: the yield type of a coroutine must have a statically known size
 
 error[E0277]: the size for values of type `str` cannot be known at compilation time
-  --> $DIR/sized-yield.rs:12:24
+  --> $DIR/sized-yield.rs:13:24
    |
 LL |     Pin::new(&mut gen).resume(());
    |                        ^^^^^^ doesn't have a size known at compile-time
diff --git a/tests/ui/coroutine/smoke-resume-args.rs b/tests/ui/coroutine/smoke-resume-args.rs
index 7d20cd2293d..209c4814001 100644
--- a/tests/ui/coroutine/smoke-resume-args.rs
+++ b/tests/ui/coroutine/smoke-resume-args.rs
@@ -3,7 +3,7 @@
 //@ revisions: default nomiropt
 //@[nomiropt]compile-flags: -Z mir-opt-level=0
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::fmt::Debug;
 use std::ops::{
@@ -50,7 +50,7 @@ fn expect_drops<T>(expected_drops: usize, f: impl FnOnce() -> T) -> T {
 
 fn main() {
     drain(
-        &mut |mut b| {
+        &mut #[coroutine] |mut b| {
             while b != 0 {
                 b = yield (b + 1);
             }
@@ -59,21 +59,24 @@ fn main() {
         vec![(1, Yielded(2)), (-45, Yielded(-44)), (500, Yielded(501)), (0, Complete(-1))],
     );
 
-    expect_drops(2, || drain(&mut |a| yield a, vec![(DropMe, Yielded(DropMe))]));
+    expect_drops(2, || drain(&mut #[coroutine] |a| yield a, vec![(DropMe, Yielded(DropMe))]));
 
     expect_drops(6, || {
         drain(
-            &mut |a| yield yield a,
+            &mut #[coroutine] |a| yield yield a,
             vec![(DropMe, Yielded(DropMe)), (DropMe, Yielded(DropMe)), (DropMe, Complete(DropMe))],
         )
     });
 
     #[allow(unreachable_code)]
-    expect_drops(2, || drain(&mut |a| yield return a, vec![(DropMe, Complete(DropMe))]));
+    expect_drops(2, || drain(
+        &mut #[coroutine] |a| yield return a,
+        vec![(DropMe, Complete(DropMe))]
+    ));
 
     expect_drops(2, || {
         drain(
-            &mut |a: DropMe| {
+            &mut #[coroutine] |a: DropMe| {
                 if false { yield () } else { a }
             },
             vec![(DropMe, Complete(DropMe))],
@@ -83,7 +86,7 @@ fn main() {
     expect_drops(4, || {
         drain(
             #[allow(unused_assignments, unused_variables)]
-            &mut |mut a: DropMe| {
+            &mut #[coroutine] |mut a: DropMe| {
                 a = yield;
                 a = yield;
                 a = yield;
diff --git a/tests/ui/coroutine/smoke.rs b/tests/ui/coroutine/smoke.rs
index 17d98a52a1c..bfb183fde93 100644
--- a/tests/ui/coroutine/smoke.rs
+++ b/tests/ui/coroutine/smoke.rs
@@ -6,7 +6,7 @@
 //@ needs-threads
 //@ compile-flags: --test
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::{CoroutineState, Coroutine};
 use std::pin::Pin;
@@ -14,7 +14,7 @@ use std::thread;
 
 #[test]
 fn simple() {
-    let mut foo = || {
+    let mut foo = #[coroutine] || {
         if false {
             yield;
         }
@@ -29,7 +29,7 @@ fn simple() {
 #[test]
 fn return_capture() {
     let a = String::from("foo");
-    let mut foo = || {
+    let mut foo = #[coroutine] || {
         if false {
             yield;
         }
@@ -44,7 +44,7 @@ fn return_capture() {
 
 #[test]
 fn simple_yield() {
-    let mut foo = || {
+    let mut foo = #[coroutine] || {
         yield;
     };
 
@@ -61,7 +61,7 @@ fn simple_yield() {
 #[test]
 fn yield_capture() {
     let b = String::from("foo");
-    let mut foo = || {
+    let mut foo = #[coroutine] || {
         yield b;
     };
 
@@ -77,7 +77,7 @@ fn yield_capture() {
 
 #[test]
 fn simple_yield_value() {
-    let mut foo = || {
+    let mut foo = #[coroutine] || {
         yield String::from("bar");
         return String::from("foo")
     };
@@ -95,7 +95,7 @@ fn simple_yield_value() {
 #[test]
 fn return_after_yield() {
     let a = String::from("foo");
-    let mut foo = || {
+    let mut foo = #[coroutine] || {
         yield;
         return a
     };
@@ -112,34 +112,34 @@ fn return_after_yield() {
 
 #[test]
 fn send_and_sync() {
-    assert_send_sync(|| {
+    assert_send_sync(#[coroutine] || {
         yield
     });
-    assert_send_sync(|| {
+    assert_send_sync(#[coroutine] || {
         yield String::from("foo");
     });
-    assert_send_sync(|| {
+    assert_send_sync(#[coroutine] || {
         yield;
         return String::from("foo");
     });
     let a = 3;
-    assert_send_sync(|| {
+    assert_send_sync(#[coroutine] || {
         yield a;
         return
     });
     let a = 3;
-    assert_send_sync(move || {
+    assert_send_sync(#[coroutine] move || {
         yield a;
         return
     });
     let a = String::from("a");
-    assert_send_sync(|| {
+    assert_send_sync(#[coroutine] || {
         yield ;
         drop(a);
         return
     });
     let a = String::from("a");
-    assert_send_sync(move || {
+    assert_send_sync(#[coroutine] move || {
         yield ;
         drop(a);
         return
@@ -150,7 +150,7 @@ fn send_and_sync() {
 
 #[test]
 fn send_over_threads() {
-    let mut foo = || { yield };
+    let mut foo = #[coroutine] || { yield };
     thread::spawn(move || {
         match Pin::new(&mut foo).resume(()) {
             CoroutineState::Yielded(()) => {}
@@ -163,7 +163,7 @@ fn send_over_threads() {
     }).join().unwrap();
 
     let a = String::from("a");
-    let mut foo = || { yield a };
+    let mut foo = #[coroutine] || { yield a };
     thread::spawn(move || {
         match Pin::new(&mut foo).resume(()) {
             CoroutineState::Yielded(ref s) if *s == "a" => {}
diff --git a/tests/ui/coroutine/static-coroutine.rs b/tests/ui/coroutine/static-coroutine.rs
index 9beaef3e4de..eba6336d342 100644
--- a/tests/ui/coroutine/static-coroutine.rs
+++ b/tests/ui/coroutine/static-coroutine.rs
@@ -1,12 +1,13 @@
 //@ run-pass
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
-use std::pin::Pin;
 use std::ops::{Coroutine, CoroutineState};
+use std::pin::Pin;
 
 fn main() {
-    let mut coroutine = static || {
+    let mut coroutine = #[coroutine]
+    static || {
         let a = true;
         let b = &a;
         yield;
diff --git a/tests/ui/coroutine/static-mut-reference-across-yield.rs b/tests/ui/coroutine/static-mut-reference-across-yield.rs
index 0d8042ed852..40d5fdf2d57 100644
--- a/tests/ui/coroutine/static-mut-reference-across-yield.rs
+++ b/tests/ui/coroutine/static-mut-reference-across-yield.rs
@@ -1,6 +1,6 @@
 //@ build-pass
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 static mut A: [i32; 5] = [1, 2, 3, 4, 5];
 
@@ -8,13 +8,15 @@ fn is_send_sync<T: Send + Sync>(_: T) {}
 
 fn main() {
     unsafe {
-        let gen_index = static || {
+        let gen_index = #[coroutine]
+        static || {
             let u = A[{
                 yield;
                 1
             }];
         };
-        let gen_match = static || match A {
+        let gen_match = #[coroutine]
+        static || match A {
             i if {
                 yield;
                 true
diff --git a/tests/ui/coroutine/static-not-unpin.current.stderr b/tests/ui/coroutine/static-not-unpin.current.stderr
index 518abdd62c7..7d6260ac569 100644
--- a/tests/ui/coroutine/static-not-unpin.current.stderr
+++ b/tests/ui/coroutine/static-not-unpin.current.stderr
@@ -1,8 +1,8 @@
-error[E0277]: `{static coroutine@$DIR/static-not-unpin.rs:15:25: 15:34}` cannot be unpinned
+error[E0277]: `{static coroutine@$DIR/static-not-unpin.rs:15:5: 15:14}` cannot be unpinned
   --> $DIR/static-not-unpin.rs:18:18
    |
 LL |     assert_unpin(coroutine);
-   |     ------------ ^^^^^^^^^ the trait `Unpin` is not implemented for `{static coroutine@$DIR/static-not-unpin.rs:15:25: 15:34}`
+   |     ------------ ^^^^^^^^^ the trait `Unpin` is not implemented for `{static coroutine@$DIR/static-not-unpin.rs:15:5: 15:14}`
    |     |
    |     required by a bound introduced by this call
    |
@@ -11,7 +11,7 @@ LL |     assert_unpin(coroutine);
 note: required by a bound in `assert_unpin`
   --> $DIR/static-not-unpin.rs:11:20
    |
-LL | fn assert_unpin<T: Unpin>(_: T) {
+LL | fn assert_unpin<T: Unpin>(_: T) {}
    |                    ^^^^^ required by this bound in `assert_unpin`
 
 error: aborting due to 1 previous error
diff --git a/tests/ui/coroutine/static-not-unpin.next.stderr b/tests/ui/coroutine/static-not-unpin.next.stderr
index 518abdd62c7..7d6260ac569 100644
--- a/tests/ui/coroutine/static-not-unpin.next.stderr
+++ b/tests/ui/coroutine/static-not-unpin.next.stderr
@@ -1,8 +1,8 @@
-error[E0277]: `{static coroutine@$DIR/static-not-unpin.rs:15:25: 15:34}` cannot be unpinned
+error[E0277]: `{static coroutine@$DIR/static-not-unpin.rs:15:5: 15:14}` cannot be unpinned
   --> $DIR/static-not-unpin.rs:18:18
    |
 LL |     assert_unpin(coroutine);
-   |     ------------ ^^^^^^^^^ the trait `Unpin` is not implemented for `{static coroutine@$DIR/static-not-unpin.rs:15:25: 15:34}`
+   |     ------------ ^^^^^^^^^ the trait `Unpin` is not implemented for `{static coroutine@$DIR/static-not-unpin.rs:15:5: 15:14}`
    |     |
    |     required by a bound introduced by this call
    |
@@ -11,7 +11,7 @@ LL |     assert_unpin(coroutine);
 note: required by a bound in `assert_unpin`
   --> $DIR/static-not-unpin.rs:11:20
    |
-LL | fn assert_unpin<T: Unpin>(_: T) {
+LL | fn assert_unpin<T: Unpin>(_: T) {}
    |                    ^^^^^ required by this bound in `assert_unpin`
 
 error: aborting due to 1 previous error
diff --git a/tests/ui/coroutine/static-not-unpin.rs b/tests/ui/coroutine/static-not-unpin.rs
index 3704cca7729..2bc25e3796d 100644
--- a/tests/ui/coroutine/static-not-unpin.rs
+++ b/tests/ui/coroutine/static-not-unpin.rs
@@ -2,17 +2,17 @@
 //@ ignore-compare-mode-next-solver (explicit revisions)
 //@[next] compile-flags: -Znext-solver
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 //@ normalize-stderr-test "std::pin::Unpin" -> "std::marker::Unpin"
 
 use std::marker::Unpin;
 
-fn assert_unpin<T: Unpin>(_: T) {
-}
+fn assert_unpin<T: Unpin>(_: T) {}
 
 fn main() {
-    let mut coroutine = static || {
+    let mut coroutine = #[coroutine]
+    static || {
         yield;
     };
     assert_unpin(coroutine); //~ ERROR E0277
diff --git a/tests/ui/coroutine/static-reference-across-yield.rs b/tests/ui/coroutine/static-reference-across-yield.rs
index cf19ccb54d5..e7ff658ebf6 100644
--- a/tests/ui/coroutine/static-reference-across-yield.rs
+++ b/tests/ui/coroutine/static-reference-across-yield.rs
@@ -4,10 +4,10 @@
 static A: [i32; 5] = [1, 2, 3, 4, 5];
 
 fn main() {
-    static || {
+    #[coroutine] static || {
         let u = A[{yield; 1}];
     };
-    static || {
+    #[coroutine] static || {
         match A {
             i if { yield; true } => (),
             _ => (),
diff --git a/tests/ui/coroutine/too-live-local-in-immovable-gen.rs b/tests/ui/coroutine/too-live-local-in-immovable-gen.rs
index 382e7ff3814..1c689ef7cef 100644
--- a/tests/ui/coroutine/too-live-local-in-immovable-gen.rs
+++ b/tests/ui/coroutine/too-live-local-in-immovable-gen.rs
@@ -5,7 +5,7 @@
 
 fn main() {
     unsafe {
-        static move || { //~ WARN unused coroutine that must be used
+        #[coroutine] static move || { //~ WARN unused coroutine that must be used
             // Tests that the coroutine transformation finds out that `a` is not live
             // during the yield expression. Type checking will also compute liveness
             // and it should also find out that `a` is not live.
diff --git a/tests/ui/coroutine/too-live-local-in-immovable-gen.stderr b/tests/ui/coroutine/too-live-local-in-immovable-gen.stderr
index 4a67dbe71e1..48df5c5beac 100644
--- a/tests/ui/coroutine/too-live-local-in-immovable-gen.stderr
+++ b/tests/ui/coroutine/too-live-local-in-immovable-gen.stderr
@@ -1,7 +1,8 @@
 warning: unused coroutine that must be used
-  --> $DIR/too-live-local-in-immovable-gen.rs:8:9
+  --> $DIR/too-live-local-in-immovable-gen.rs:8:22
    |
-LL | /         static move || {
+LL |           #[coroutine] static move || {
+   |  ______________________^
 LL | |             // Tests that the coroutine transformation finds out that `a` is not live
 LL | |             // during the yield expression. Type checking will also compute liveness
 LL | |             // and it should also find out that `a` is not live.
diff --git a/tests/ui/coroutine/too-many-parameters.rs b/tests/ui/coroutine/too-many-parameters.rs
index 377d80c7b22..3baaf062347 100644
--- a/tests/ui/coroutine/too-many-parameters.rs
+++ b/tests/ui/coroutine/too-many-parameters.rs
@@ -1,6 +1,7 @@
 #![feature(coroutines)]
 
 fn main() {
+    #[coroutine]
     |(), ()| {
         //~^ error: too many parameters for a coroutine
         yield;
diff --git a/tests/ui/coroutine/too-many-parameters.stderr b/tests/ui/coroutine/too-many-parameters.stderr
index c0917c7225b..45dad8e349e 100644
--- a/tests/ui/coroutine/too-many-parameters.stderr
+++ b/tests/ui/coroutine/too-many-parameters.stderr
@@ -1,5 +1,5 @@
 error[E0628]: too many parameters for a coroutine (expected 0 or 1 parameters)
-  --> $DIR/too-many-parameters.rs:4:5
+  --> $DIR/too-many-parameters.rs:5:5
    |
 LL |     |(), ()| {
    |     ^^^^^^^^
diff --git a/tests/ui/coroutine/type-mismatch-error.rs b/tests/ui/coroutine/type-mismatch-error.rs
index 0d04c21484c..ee4e27c20da 100644
--- a/tests/ui/coroutine/type-mismatch-error.rs
+++ b/tests/ui/coroutine/type-mismatch-error.rs
@@ -1,7 +1,7 @@
 //! Test that we get the expected type mismatch error instead of "closure is expected to take 0
 //! arguments" (which got introduced after implementing resume arguments).
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::Coroutine;
 
@@ -9,6 +9,7 @@ fn f<G: Coroutine>(_: G, _: G::Return) {}
 
 fn main() {
     f(
+        #[coroutine]
         |a: u8| {
             if false {
                 yield ();
diff --git a/tests/ui/coroutine/type-mismatch-error.stderr b/tests/ui/coroutine/type-mismatch-error.stderr
index 737d9afdd79..f10c30e2590 100644
--- a/tests/ui/coroutine/type-mismatch-error.stderr
+++ b/tests/ui/coroutine/type-mismatch-error.stderr
@@ -1,5 +1,5 @@
 error[E0308]: `if` and `else` have incompatible types
-  --> $DIR/type-mismatch-error.rs:16:17
+  --> $DIR/type-mismatch-error.rs:17:17
    |
 LL | /             if false {
 LL | |                 yield ();
diff --git a/tests/ui/coroutine/type-mismatch-signature-deduction.rs b/tests/ui/coroutine/type-mismatch-signature-deduction.rs
index d4ca622e80f..5b04b3efaaa 100644
--- a/tests/ui/coroutine/type-mismatch-signature-deduction.rs
+++ b/tests/ui/coroutine/type-mismatch-signature-deduction.rs
@@ -4,6 +4,7 @@ use std::ops::Coroutine;
 
 fn foo() -> impl Coroutine<Return = i32> {
     //~^ ERROR type mismatch
+    #[coroutine]
     || {
         if false {
             return Ok(6);
diff --git a/tests/ui/coroutine/type-mismatch-signature-deduction.stderr b/tests/ui/coroutine/type-mismatch-signature-deduction.stderr
index f26e30a8e74..08927196037 100644
--- a/tests/ui/coroutine/type-mismatch-signature-deduction.stderr
+++ b/tests/ui/coroutine/type-mismatch-signature-deduction.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/type-mismatch-signature-deduction.rs:14:9
+  --> $DIR/type-mismatch-signature-deduction.rs:15:9
    |
 LL |         5
    |         ^ expected `Result<{integer}, _>`, found integer
@@ -7,7 +7,7 @@ LL |         5
    = note: expected enum `Result<{integer}, _>`
               found type `{integer}`
 note: return type inferred to be `Result<{integer}, _>` here
-  --> $DIR/type-mismatch-signature-deduction.rs:9:20
+  --> $DIR/type-mismatch-signature-deduction.rs:10:20
    |
 LL |             return Ok(6);
    |                    ^^^^^
@@ -18,7 +18,7 @@ LL |         Ok(5)
 LL |         Err(5)
    |         ++++ +
 
-error[E0271]: type mismatch resolving `<{coroutine@$DIR/type-mismatch-signature-deduction.rs:7:5: 7:7} as Coroutine>::Return == i32`
+error[E0271]: type mismatch resolving `<{coroutine@$DIR/type-mismatch-signature-deduction.rs:8:5: 8:7} as Coroutine>::Return == i32`
   --> $DIR/type-mismatch-signature-deduction.rs:5:13
    |
 LL | fn foo() -> impl Coroutine<Return = i32> {
diff --git a/tests/ui/coroutine/uninhabited-field.rs b/tests/ui/coroutine/uninhabited-field.rs
index 79776d653b1..d6ada07ce0c 100644
--- a/tests/ui/coroutine/uninhabited-field.rs
+++ b/tests/ui/coroutine/uninhabited-field.rs
@@ -3,7 +3,7 @@
 #![allow(unused)]
 #![feature(assert_matches)]
 #![feature(coroutine_trait)]
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![feature(never_type)]
 use std::assert_matches::assert_matches;
 use std::ops::Coroutine;
@@ -13,7 +13,7 @@ use std::pin::Pin;
 fn conjure<T>() -> T { loop {} }
 
 fn run<T>(x: bool, y: bool) {
-    let mut c = || {
+    let mut c = #[coroutine] || {
         if x {
             let a : T;
             if y {
diff --git a/tests/ui/coroutine/unsized-capture-across-yield.rs b/tests/ui/coroutine/unsized-capture-across-yield.rs
index ef9cbc1d677..c86b1823aaf 100644
--- a/tests/ui/coroutine/unsized-capture-across-yield.rs
+++ b/tests/ui/coroutine/unsized-capture-across-yield.rs
@@ -7,6 +7,7 @@ use std::ops::Coroutine;
 
 fn capture() -> impl Coroutine {
     let b: [u8] = *(Box::new([]) as Box<[u8]>);
+    #[coroutine]
     move || {
         println!("{:?}", &b);
         //~^ ERROR the size for values of type `[u8]` cannot be known at compilation time
diff --git a/tests/ui/coroutine/unsized-capture-across-yield.stderr b/tests/ui/coroutine/unsized-capture-across-yield.stderr
index 436f0901a97..03551f1bbff 100644
--- a/tests/ui/coroutine/unsized-capture-across-yield.stderr
+++ b/tests/ui/coroutine/unsized-capture-across-yield.stderr
@@ -8,7 +8,7 @@ LL | #![feature(unsized_locals)]
    = note: `#[warn(incomplete_features)]` on by default
 
 error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
-  --> $DIR/unsized-capture-across-yield.rs:11:27
+  --> $DIR/unsized-capture-across-yield.rs:12:27
    |
 LL |     move || {
    |          -- this closure captures all values by move
diff --git a/tests/ui/coroutine/unsized-local-across-yield.rs b/tests/ui/coroutine/unsized-local-across-yield.rs
index 7a8ed60e46a..cb8ced13a11 100644
--- a/tests/ui/coroutine/unsized-local-across-yield.rs
+++ b/tests/ui/coroutine/unsized-local-across-yield.rs
@@ -6,6 +6,7 @@
 use std::ops::Coroutine;
 
 fn across() -> impl Coroutine {
+    #[coroutine]
     move || {
         let b: [u8] = *(Box::new([]) as Box<[u8]>);
         //~^ ERROR the size for values of type `[u8]` cannot be known at compilation time
diff --git a/tests/ui/coroutine/unsized-local-across-yield.stderr b/tests/ui/coroutine/unsized-local-across-yield.stderr
index c4c3be77ac2..4fe0f135a9d 100644
--- a/tests/ui/coroutine/unsized-local-across-yield.stderr
+++ b/tests/ui/coroutine/unsized-local-across-yield.stderr
@@ -8,7 +8,7 @@ LL | #![feature(unsized_locals)]
    = note: `#[warn(incomplete_features)]` on by default
 
 error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
-  --> $DIR/unsized-local-across-yield.rs:10:13
+  --> $DIR/unsized-local-across-yield.rs:11:13
    |
 LL |         let b: [u8] = *(Box::new([]) as Box<[u8]>);
    |             ^ doesn't have a size known at compile-time
diff --git a/tests/ui/coroutine/yield-in-args-rev.rs b/tests/ui/coroutine/yield-in-args-rev.rs
index b074e2bc939..29d79df25fb 100644
--- a/tests/ui/coroutine/yield-in-args-rev.rs
+++ b/tests/ui/coroutine/yield-in-args-rev.rs
@@ -10,7 +10,7 @@
 fn foo(_a: (), _b: &bool) {}
 
 fn bar() {
-    || { //~ WARN unused coroutine that must be used
+    #[coroutine] || { //~ WARN unused coroutine that must be used
         let b = true;
         foo(yield, &b);
     };
diff --git a/tests/ui/coroutine/yield-in-args-rev.stderr b/tests/ui/coroutine/yield-in-args-rev.stderr
index dbf46739e8b..10829d66185 100644
--- a/tests/ui/coroutine/yield-in-args-rev.stderr
+++ b/tests/ui/coroutine/yield-in-args-rev.stderr
@@ -1,7 +1,8 @@
 warning: unused coroutine that must be used
-  --> $DIR/yield-in-args-rev.rs:13:5
+  --> $DIR/yield-in-args-rev.rs:13:18
    |
-LL | /     || {
+LL |       #[coroutine] || {
+   |  __________________^
 LL | |         let b = true;
 LL | |         foo(yield, &b);
 LL | |     };
diff --git a/tests/ui/coroutine/yield-in-args.rs b/tests/ui/coroutine/yield-in-args.rs
index b2827148d77..bc9909b310c 100644
--- a/tests/ui/coroutine/yield-in-args.rs
+++ b/tests/ui/coroutine/yield-in-args.rs
@@ -3,6 +3,7 @@
 fn foo(_b: &bool, _a: ()) {}
 
 fn main() {
+    #[coroutine]
     || {
         let b = true;
         foo(&b, yield); //~ ERROR
diff --git a/tests/ui/coroutine/yield-in-args.stderr b/tests/ui/coroutine/yield-in-args.stderr
index 7233f47884b..1d2c54f9bdb 100644
--- a/tests/ui/coroutine/yield-in-args.stderr
+++ b/tests/ui/coroutine/yield-in-args.stderr
@@ -1,5 +1,5 @@
 error[E0626]: borrow may still be in use when coroutine yields
-  --> $DIR/yield-in-args.rs:8:13
+  --> $DIR/yield-in-args.rs:9:13
    |
 LL |         foo(&b, yield);
    |             ^^  ----- possible yield occurs here
diff --git a/tests/ui/coroutine/yield-in-const.rs b/tests/ui/coroutine/yield-in-const.rs
index 22651f32cf8..dc1b30155b9 100644
--- a/tests/ui/coroutine/yield-in-const.rs
+++ b/tests/ui/coroutine/yield-in-const.rs
@@ -2,5 +2,6 @@
 
 const A: u8 = { yield 3u8; 3u8};
 //~^ ERROR yield expression outside
+//~| ERROR `yield` can only be used in
 
 fn main() {}
diff --git a/tests/ui/coroutine/yield-in-const.stderr b/tests/ui/coroutine/yield-in-const.stderr
index d5748b05337..f02729412cc 100644
--- a/tests/ui/coroutine/yield-in-const.stderr
+++ b/tests/ui/coroutine/yield-in-const.stderr
@@ -1,9 +1,15 @@
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/yield-in-const.rs:3:17
+   |
+LL | const A: u8 = { yield 3u8; 3u8};
+   |                 ^^^^^^^^^
+
 error[E0627]: yield expression outside of coroutine literal
   --> $DIR/yield-in-const.rs:3:17
    |
 LL | const A: u8 = { yield 3u8; 3u8};
    |                 ^^^^^^^^^
 
-error: aborting due to 1 previous error
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0627`.
diff --git a/tests/ui/coroutine/yield-in-function.rs b/tests/ui/coroutine/yield-in-function.rs
index a99312043bd..427c5d0e7f5 100644
--- a/tests/ui/coroutine/yield-in-function.rs
+++ b/tests/ui/coroutine/yield-in-function.rs
@@ -2,3 +2,4 @@
 
 fn main() { yield; }
 //~^ ERROR yield expression outside
+//~| ERROR `yield` can only be used in
diff --git a/tests/ui/coroutine/yield-in-function.stderr b/tests/ui/coroutine/yield-in-function.stderr
index b9d4708bb8d..dbebf310b04 100644
--- a/tests/ui/coroutine/yield-in-function.stderr
+++ b/tests/ui/coroutine/yield-in-function.stderr
@@ -1,9 +1,20 @@
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/yield-in-function.rs:3:13
+   |
+LL | fn main() { yield; }
+   |             ^^^^^
+   |
+help: use `#[coroutine]` to make this closure a coroutine
+   |
+LL | #[coroutine] fn main() { yield; }
+   | ++++++++++++
+
 error[E0627]: yield expression outside of coroutine literal
   --> $DIR/yield-in-function.rs:3:13
    |
 LL | fn main() { yield; }
    |             ^^^^^
 
-error: aborting due to 1 previous error
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0627`.
diff --git a/tests/ui/coroutine/yield-in-initializer.rs b/tests/ui/coroutine/yield-in-initializer.rs
index 19218926b8a..3caefac013e 100644
--- a/tests/ui/coroutine/yield-in-initializer.rs
+++ b/tests/ui/coroutine/yield-in-initializer.rs
@@ -3,7 +3,7 @@
 #![feature(coroutines)]
 
 fn main() {
-    static || { //~ WARN unused coroutine that must be used
+    #[coroutine] static || { //~ WARN unused coroutine that must be used
         loop {
             // Test that `opt` is not live across the yield, even when borrowed in a loop
             // See https://github.com/rust-lang/rust/issues/52792
diff --git a/tests/ui/coroutine/yield-in-initializer.stderr b/tests/ui/coroutine/yield-in-initializer.stderr
index 614df43f2f5..1e22b787668 100644
--- a/tests/ui/coroutine/yield-in-initializer.stderr
+++ b/tests/ui/coroutine/yield-in-initializer.stderr
@@ -1,7 +1,8 @@
 warning: unused coroutine that must be used
-  --> $DIR/yield-in-initializer.rs:6:5
+  --> $DIR/yield-in-initializer.rs:6:18
    |
-LL | /     static || {
+LL |       #[coroutine] static || {
+   |  __________________^
 LL | |         loop {
 LL | |             // Test that `opt` is not live across the yield, even when borrowed in a loop
 LL | |             // See https://github.com/rust-lang/rust/issues/52792
diff --git a/tests/ui/coroutine/yield-in-static.rs b/tests/ui/coroutine/yield-in-static.rs
index 45e0380d46d..99d08913e64 100644
--- a/tests/ui/coroutine/yield-in-static.rs
+++ b/tests/ui/coroutine/yield-in-static.rs
@@ -2,5 +2,6 @@
 
 static B: u8 = { yield 3u8; 3u8};
 //~^ ERROR yield expression outside
+//~| ERROR `yield` can only be used in
 
 fn main() {}
diff --git a/tests/ui/coroutine/yield-in-static.stderr b/tests/ui/coroutine/yield-in-static.stderr
index b56283cab66..d1fd4eab0fc 100644
--- a/tests/ui/coroutine/yield-in-static.stderr
+++ b/tests/ui/coroutine/yield-in-static.stderr
@@ -1,9 +1,15 @@
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/yield-in-static.rs:3:18
+   |
+LL | static B: u8 = { yield 3u8; 3u8};
+   |                  ^^^^^^^^^
+
 error[E0627]: yield expression outside of coroutine literal
   --> $DIR/yield-in-static.rs:3:18
    |
 LL | static B: u8 = { yield 3u8; 3u8};
    |                  ^^^^^^^^^
 
-error: aborting due to 1 previous error
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0627`.
diff --git a/tests/ui/coroutine/yield-outside-coroutine-issue-78653.rs b/tests/ui/coroutine/yield-outside-coroutine-issue-78653.rs
index 31025c33b1a..6833bc99012 100644
--- a/tests/ui/coroutine/yield-outside-coroutine-issue-78653.rs
+++ b/tests/ui/coroutine/yield-outside-coroutine-issue-78653.rs
@@ -4,4 +4,5 @@ fn main() {
     yield || for i in 0 { }
     //~^ ERROR yield expression outside of coroutine literal
     //~| ERROR `{integer}` is not an iterator
+    //~| ERROR `yield` can only be used in
 }
diff --git a/tests/ui/coroutine/yield-outside-coroutine-issue-78653.stderr b/tests/ui/coroutine/yield-outside-coroutine-issue-78653.stderr
index 8f8bec99458..921e8d5d47a 100644
--- a/tests/ui/coroutine/yield-outside-coroutine-issue-78653.stderr
+++ b/tests/ui/coroutine/yield-outside-coroutine-issue-78653.stderr
@@ -1,3 +1,14 @@
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/yield-outside-coroutine-issue-78653.rs:4:5
+   |
+LL |     yield || for i in 0 { }
+   |     ^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: use `#[coroutine]` to make this closure a coroutine
+   |
+LL | #[coroutine] fn main() {
+   | ++++++++++++
+
 error[E0627]: yield expression outside of coroutine literal
   --> $DIR/yield-outside-coroutine-issue-78653.rs:4:5
    |
@@ -14,7 +25,7 @@ LL |     yield || for i in 0 { }
    = note: if you want to iterate between `start` until a value `end`, use the exclusive range syntax `start..end` or the inclusive range syntax `start..=end`
    = note: required for `{integer}` to implement `IntoIterator`
 
-error: aborting due to 2 previous errors
+error: aborting due to 3 previous errors
 
 Some errors have detailed explanations: E0277, E0627.
 For more information about an error, try `rustc --explain E0277`.
diff --git a/tests/ui/coroutine/yield-subtype.rs b/tests/ui/coroutine/yield-subtype.rs
index 271f8362f17..adee5075e83 100644
--- a/tests/ui/coroutine/yield-subtype.rs
+++ b/tests/ui/coroutine/yield-subtype.rs
@@ -8,7 +8,7 @@ fn bar<'a>() {
     let a: &'static str = "hi";
     let b: &'a str = a;
 
-    || { //~ WARN unused coroutine that must be used
+    #[coroutine] || { //~ WARN unused coroutine that must be used
         yield a;
         yield b;
     };
diff --git a/tests/ui/coroutine/yield-subtype.stderr b/tests/ui/coroutine/yield-subtype.stderr
index 5e7ae9f581e..973415327a5 100644
--- a/tests/ui/coroutine/yield-subtype.stderr
+++ b/tests/ui/coroutine/yield-subtype.stderr
@@ -1,7 +1,8 @@
 warning: unused coroutine that must be used
-  --> $DIR/yield-subtype.rs:11:5
+  --> $DIR/yield-subtype.rs:11:18
    |
-LL | /     || {
+LL |       #[coroutine] || {
+   |  __________________^
 LL | |         yield a;
 LL | |         yield b;
 LL | |     };
diff --git a/tests/ui/coroutine/yield-while-iterating.rs b/tests/ui/coroutine/yield-while-iterating.rs
index 66ac6d3922a..77f601e4f2c 100644
--- a/tests/ui/coroutine/yield-while-iterating.rs
+++ b/tests/ui/coroutine/yield-while-iterating.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::ops::{CoroutineState, Coroutine};
 use std::cell::Cell;
@@ -9,7 +9,7 @@ fn yield_during_iter_owned_data(x: Vec<i32>) {
     // reference to it.  This winds up becoming a rather confusing
     // regionck error -- in particular, we would freeze with the
     // reference in scope, and it doesn't live long enough.
-    let _b = move || {
+    let _b =#[coroutine]  move || {
         for p in &x { //~ ERROR
             yield();
         }
@@ -17,7 +17,7 @@ fn yield_during_iter_owned_data(x: Vec<i32>) {
 }
 
 fn yield_during_iter_borrowed_slice(x: &[i32]) {
-    let _b = move || {
+    let _b = #[coroutine] move || {
         for p in x {
             yield();
         }
@@ -26,7 +26,7 @@ fn yield_during_iter_borrowed_slice(x: &[i32]) {
 
 fn yield_during_iter_borrowed_slice_2() {
     let mut x = vec![22_i32];
-    let _b = || {
+    let _b = #[coroutine] || {
         for p in &x {
             yield();
         }
@@ -38,7 +38,7 @@ fn yield_during_iter_borrowed_slice_3() {
     // OK to take a mutable ref to `x` and yield
     // up pointers from it:
     let mut x = vec![22_i32];
-    let mut b = || {
+    let mut b = #[coroutine] || {
         for p in &mut x {
             yield p;
         }
@@ -50,7 +50,7 @@ fn yield_during_iter_borrowed_slice_4() {
     // ...but not OK to do that while reading
     // from `x` too
     let mut x = vec![22_i32];
-    let mut b = || {
+    let mut b = #[coroutine] || {
         for p in &mut x {
             yield p;
         }
@@ -61,7 +61,7 @@ fn yield_during_iter_borrowed_slice_4() {
 
 fn yield_during_range_iter() {
     // Should be OK.
-    let mut b = || {
+    let mut b = #[coroutine] || {
         let v = vec![1,2,3];
         let len = v.len();
         for i in 0..len {
diff --git a/tests/ui/coroutine/yield-while-iterating.stderr b/tests/ui/coroutine/yield-while-iterating.stderr
index 5330121f372..f81c914c4bd 100644
--- a/tests/ui/coroutine/yield-while-iterating.stderr
+++ b/tests/ui/coroutine/yield-while-iterating.stderr
@@ -9,8 +9,8 @@ LL |             yield();
 error[E0502]: cannot borrow `x` as immutable because it is also borrowed as mutable
   --> $DIR/yield-while-iterating.rs:58:20
    |
-LL |     let mut b = || {
-   |                 -- mutable borrow occurs here
+LL |     let mut b = #[coroutine] || {
+   |                              -- mutable borrow occurs here
 LL |         for p in &mut x {
    |                       - first borrow occurs due to use of `x` in coroutine
 ...
diff --git a/tests/ui/coroutine/yield-while-local-borrowed.rs b/tests/ui/coroutine/yield-while-local-borrowed.rs
index 7f8d1d4543d..3db30c36712 100644
--- a/tests/ui/coroutine/yield-while-local-borrowed.rs
+++ b/tests/ui/coroutine/yield-while-local-borrowed.rs
@@ -1,4 +1,4 @@
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
 use std::cell::Cell;
 use std::ops::{Coroutine, CoroutineState};
@@ -9,7 +9,7 @@ fn borrow_local_inline() {
     //
     // (This error occurs because the region shows up in the type of
     // `b` and gets extended by region inference.)
-    let mut b = move || {
+    let mut b = #[coroutine] move || {
         let a = &mut 3;
         //~^ ERROR borrow may still be in use when coroutine yields
         yield ();
@@ -20,7 +20,7 @@ fn borrow_local_inline() {
 
 fn borrow_local_inline_done() {
     // No error here -- `a` is not in scope at the point of `yield`.
-    let mut b = move || {
+    let mut b = #[coroutine] move || {
         {
             let a = &mut 3;
         }
@@ -34,7 +34,7 @@ fn borrow_local() {
     //
     // (This error occurs because the region shows up in the type of
     // `b` and gets extended by region inference.)
-    let mut b = move || {
+    let mut b = #[coroutine] move || {
         let a = 3;
         {
             let b = &a;
diff --git a/tests/ui/coroutine/yield-while-ref-reborrowed.rs b/tests/ui/coroutine/yield-while-ref-reborrowed.rs
index 07c59175858..2600d0b4124 100644
--- a/tests/ui/coroutine/yield-while-ref-reborrowed.rs
+++ b/tests/ui/coroutine/yield-while-ref-reborrowed.rs
@@ -1,15 +1,16 @@
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 
-use std::ops::{CoroutineState, Coroutine};
 use std::cell::Cell;
+use std::ops::{Coroutine, CoroutineState};
 use std::pin::Pin;
 
 fn reborrow_shared_ref(x: &i32) {
     // This is OK -- we have a borrow live over the yield, but it's of
     // data that outlives the coroutine.
-    let mut b = move || {
+    let mut b = #[coroutine]
+    move || {
         let a = &*x;
-        yield();
+        yield ();
         println!("{}", a);
     };
     Pin::new(&mut b).resume(());
@@ -18,9 +19,10 @@ fn reborrow_shared_ref(x: &i32) {
 fn reborrow_mutable_ref(x: &mut i32) {
     // This is OK -- we have a borrow live over the yield, but it's of
     // data that outlives the coroutine.
-    let mut b = move || {
+    let mut b = #[coroutine]
+    move || {
         let a = &mut *x;
-        yield();
+        yield ();
         println!("{}", a);
     };
     Pin::new(&mut b).resume(());
@@ -28,13 +30,14 @@ fn reborrow_mutable_ref(x: &mut i32) {
 
 fn reborrow_mutable_ref_2(x: &mut i32) {
     // ...but not OK to go on using `x`.
-    let mut b = || {
+    let mut b = #[coroutine]
+    || {
         let a = &mut *x;
-        yield();
+        yield ();
         println!("{}", a);
     };
     println!("{}", x); //~ ERROR
     Pin::new(&mut b).resume(());
 }
 
-fn main() { }
+fn main() {}
diff --git a/tests/ui/coroutine/yield-while-ref-reborrowed.stderr b/tests/ui/coroutine/yield-while-ref-reborrowed.stderr
index 62ac0265311..7c9b766457d 100644
--- a/tests/ui/coroutine/yield-while-ref-reborrowed.stderr
+++ b/tests/ui/coroutine/yield-while-ref-reborrowed.stderr
@@ -1,8 +1,8 @@
 error[E0501]: cannot borrow `x` as immutable because previous closure requires unique access
-  --> $DIR/yield-while-ref-reborrowed.rs:36:20
+  --> $DIR/yield-while-ref-reborrowed.rs:39:20
    |
-LL |     let mut b = || {
-   |                 -- coroutine construction occurs here
+LL |     || {
+   |     -- coroutine construction occurs here
 LL |         let a = &mut *x;
    |                      -- first borrow occurs due to use of `x` in coroutine
 ...
diff --git a/tests/ui/delegation/auxiliary/fn-header-aux.rs b/tests/ui/delegation/auxiliary/fn-header-aux.rs
new file mode 100644
index 00000000000..d26209a4f78
--- /dev/null
+++ b/tests/ui/delegation/auxiliary/fn-header-aux.rs
@@ -0,0 +1,9 @@
+//@ edition:2018
+
+#![feature(c_variadic)]
+
+pub unsafe fn unsafe_fn_extern() {}
+pub extern "C" fn extern_fn_extern() {}
+pub unsafe extern "C" fn variadic_fn_extern(n: usize, mut args: ...) {}
+pub const fn const_fn_extern() {}
+pub async fn async_fn_extern() {}
diff --git a/tests/ui/delegation/fn-header.rs b/tests/ui/delegation/fn-header.rs
new file mode 100644
index 00000000000..db20e1058e0
--- /dev/null
+++ b/tests/ui/delegation/fn-header.rs
@@ -0,0 +1,57 @@
+//@ check-pass
+//@ edition:2018
+//@ aux-crate:fn_header_aux=fn-header-aux.rs
+
+#![feature(c_variadic)]
+#![feature(fn_delegation)]
+#![allow(incomplete_features)]
+#![deny(unused_unsafe)]
+
+mod to_reuse {
+    pub unsafe fn unsafe_fn() {}
+    pub extern "C" fn extern_fn() {}
+    pub unsafe extern "C" fn variadic_fn(n: usize, mut args: ...) {}
+    pub const fn const_fn() {}
+    pub async fn async_fn() {}
+}
+
+reuse to_reuse::unsafe_fn;
+reuse to_reuse::extern_fn;
+reuse to_reuse::variadic_fn;
+reuse to_reuse::const_fn;
+reuse to_reuse::async_fn;
+
+reuse fn_header_aux::unsafe_fn_extern;
+reuse fn_header_aux::extern_fn_extern;
+reuse fn_header_aux::variadic_fn_extern;
+reuse fn_header_aux::const_fn_extern;
+reuse fn_header_aux::async_fn_extern;
+
+const fn const_check() {
+    const_fn();
+    const_fn_extern();
+}
+
+async fn async_check() {
+    async_fn().await;
+    async_fn_extern().await;
+}
+
+fn main() {
+    unsafe {
+        unsafe_fn();
+        unsafe_fn_extern();
+    }
+    extern_fn();
+    extern_fn_extern();
+    let _: extern "C" fn() = extern_fn;
+    let _: extern "C" fn() = extern_fn_extern;
+    unsafe {
+        variadic_fn(0);
+        variadic_fn(0, 1);
+        variadic_fn_extern(0);
+        variadic_fn_extern(0, 1);
+    }
+    let _: unsafe extern "C" fn(usize, ...) = variadic_fn;
+    let _: unsafe extern "C" fn(usize, ...) = variadic_fn_extern;
+}
diff --git a/tests/ui/delegation/impl-trait.rs b/tests/ui/delegation/impl-trait.rs
new file mode 100644
index 00000000000..13df0155485
--- /dev/null
+++ b/tests/ui/delegation/impl-trait.rs
@@ -0,0 +1,27 @@
+//@ check-pass
+
+#![feature(fn_delegation)]
+#![allow(incomplete_features)]
+
+mod to_reuse {
+    pub fn foo() -> impl Clone { 0 }
+}
+
+reuse to_reuse::foo;
+
+trait Trait {
+    fn bar() -> impl Clone { 1 }
+}
+
+struct S;
+impl Trait for S {}
+
+impl S {
+    reuse to_reuse::foo;
+    reuse <S as Trait>::bar;
+}
+
+fn main() {
+    foo().clone();
+    <S>::bar().clone();
+}
diff --git a/tests/ui/delegation/not-supported.rs b/tests/ui/delegation/not-supported.rs
index 9dccb12b57a..5f78de97638 100644
--- a/tests/ui/delegation/not-supported.rs
+++ b/tests/ui/delegation/not-supported.rs
@@ -14,9 +14,9 @@ mod generics {
         fn foo3<'a: 'a>(_: &'a u32) {}
 
         reuse GenericTrait::bar;
-        //~^ delegation with early bound generics is not supported yet
+        //~^ ERROR delegation with early bound generics is not supported yet
         reuse GenericTrait::bar1;
-        //~^ delegation with early bound generics is not supported yet
+        //~^ ERROR delegation with early bound generics is not supported yet
     }
 
     struct F;
@@ -73,26 +73,18 @@ mod opaque {
     }
     reuse to_reuse::opaque_arg;
     //~^ ERROR delegation with early bound generics is not supported yet
-    reuse to_reuse::opaque_ret;
-    //~^ ERROR delegation to a function with opaque type is not supported yet
-}
 
-mod fn_header {
-    mod to_reuse {
-        pub unsafe fn unsafe_fn() {}
-        pub extern "C" fn extern_fn() {}
-        pub unsafe extern "C" fn variadic_fn(n: usize, mut args: ...) {}
-        pub const fn const_fn() {}
+    trait ToReuse {
+        fn opaque_ret() -> impl Trait { unimplemented!() }
     }
 
-    reuse to_reuse::unsafe_fn;
-    //~^ ERROR delegation to unsafe functions is not supported yet
-    reuse to_reuse::extern_fn;
-    //~^ ERROR delegation to non Rust ABI functions is not supported yet
-    reuse to_reuse::variadic_fn;
-    //~^ ERROR delegation to variadic functions is not supported yet
-    reuse to_reuse::const_fn;
-    //~^ ERROR delegation to const functions is not supported yet
+    // FIXME: Inherited `impl Trait`s create query cycles when used inside trait impls.
+    impl ToReuse for u8 {
+        reuse to_reuse::opaque_ret; //~ ERROR cycle detected when computing type
+    }
+    impl ToReuse for u16 {
+        reuse ToReuse::opaque_ret; //~ ERROR cycle detected when computing type
+    }
 }
 
 mod recursive {
diff --git a/tests/ui/delegation/not-supported.stderr b/tests/ui/delegation/not-supported.stderr
index f6c49366899..e2cb04f977b 100644
--- a/tests/ui/delegation/not-supported.stderr
+++ b/tests/ui/delegation/not-supported.stderr
@@ -115,53 +115,46 @@ LL |         pub fn opaque_arg(_: impl Trait) -> i32 { 0 }
 LL |     reuse to_reuse::opaque_arg;
    |                     ^^^^^^^^^^
 
-error: delegation to a function with opaque type is not supported yet
-  --> $DIR/not-supported.rs:76:21
+error[E0391]: cycle detected when computing type of `opaque::<impl at $DIR/not-supported.rs:82:5: 82:24>::{synthetic#0}`
+  --> $DIR/not-supported.rs:83:25
    |
-LL |         pub fn opaque_ret() -> impl Trait { unimplemented!() }
-   |         --------------------------------- callee defined here
-...
-LL |     reuse to_reuse::opaque_ret;
-   |                     ^^^^^^^^^^
-
-error: delegation to unsafe functions is not supported yet
-  --> $DIR/not-supported.rs:88:21
+LL |         reuse to_reuse::opaque_ret;
+   |                         ^^^^^^^^^^
    |
-LL |         pub unsafe fn unsafe_fn() {}
-   |         ------------------------- callee defined here
-...
-LL |     reuse to_reuse::unsafe_fn;
-   |                     ^^^^^^^^^
-
-error: delegation to non Rust ABI functions is not supported yet
-  --> $DIR/not-supported.rs:90:21
+note: ...which requires comparing an impl and trait method signature, inferring any hidden `impl Trait` types in the process...
+  --> $DIR/not-supported.rs:83:25
    |
-LL |         pub extern "C" fn extern_fn() {}
-   |         ----------------------------- callee defined here
-...
-LL |     reuse to_reuse::extern_fn;
-   |                     ^^^^^^^^^
-
-error: delegation to variadic functions is not supported yet
-  --> $DIR/not-supported.rs:92:21
+LL |         reuse to_reuse::opaque_ret;
+   |                         ^^^^^^^^^^
+   = note: ...which again requires computing type of `opaque::<impl at $DIR/not-supported.rs:82:5: 82:24>::{synthetic#0}`, completing the cycle
+note: cycle used when checking that `opaque::<impl at $DIR/not-supported.rs:82:5: 82:24>` is well-formed
+  --> $DIR/not-supported.rs:82:5
    |
-LL |         pub unsafe extern "C" fn variadic_fn(n: usize, mut args: ...) {}
-   |         ------------------------------------------------------------- callee defined here
-...
-LL |     reuse to_reuse::variadic_fn;
-   |                     ^^^^^^^^^^^
+LL |     impl ToReuse for u8 {
+   |     ^^^^^^^^^^^^^^^^^^^
+   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
 
-error: delegation to const functions is not supported yet
-  --> $DIR/not-supported.rs:94:21
+error[E0391]: cycle detected when computing type of `opaque::<impl at $DIR/not-supported.rs:85:5: 85:25>::{synthetic#0}`
+  --> $DIR/not-supported.rs:86:24
    |
-LL |         pub const fn const_fn() {}
-   |         ----------------------- callee defined here
-...
-LL |     reuse to_reuse::const_fn;
-   |                     ^^^^^^^^
+LL |         reuse ToReuse::opaque_ret;
+   |                        ^^^^^^^^^^
+   |
+note: ...which requires comparing an impl and trait method signature, inferring any hidden `impl Trait` types in the process...
+  --> $DIR/not-supported.rs:86:24
+   |
+LL |         reuse ToReuse::opaque_ret;
+   |                        ^^^^^^^^^^
+   = note: ...which again requires computing type of `opaque::<impl at $DIR/not-supported.rs:85:5: 85:25>::{synthetic#0}`, completing the cycle
+note: cycle used when checking that `opaque::<impl at $DIR/not-supported.rs:85:5: 85:25>` is well-formed
+  --> $DIR/not-supported.rs:85:5
+   |
+LL |     impl ToReuse for u16 {
+   |     ^^^^^^^^^^^^^^^^^^^^
+   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
 
 error: recursive delegation is not supported yet
-  --> $DIR/not-supported.rs:107:22
+  --> $DIR/not-supported.rs:99:22
    |
 LL |         pub reuse to_reuse2::foo;
    |                              --- callee defined here
@@ -169,7 +162,7 @@ LL |         pub reuse to_reuse2::foo;
 LL |     reuse to_reuse1::foo;
    |                      ^^^
 
-error: aborting due to 19 previous errors
+error: aborting due to 16 previous errors
 
-Some errors have detailed explanations: E0049, E0195.
+Some errors have detailed explanations: E0049, E0195, E0391.
 For more information about an error, try `rustc --explain E0049`.
diff --git a/tests/ui/delegation/rename.rs b/tests/ui/delegation/rename.rs
new file mode 100644
index 00000000000..f4b3da76c56
--- /dev/null
+++ b/tests/ui/delegation/rename.rs
@@ -0,0 +1,20 @@
+//@ check-pass
+
+#![feature(fn_delegation)]
+#![allow(incomplete_features)]
+
+mod to_reuse {
+    pub fn a() {}
+}
+
+reuse to_reuse::a as b;
+
+struct S;
+impl S {
+    reuse to_reuse::a as b;
+}
+
+fn main() {
+    b();
+    S::b();
+}
diff --git a/tests/ui/derives/deriving-with-repr-packed.stderr b/tests/ui/derives/deriving-with-repr-packed.stderr
index 26ac532263f..a8523d25cab 100644
--- a/tests/ui/derives/deriving-with-repr-packed.stderr
+++ b/tests/ui/derives/deriving-with-repr-packed.stderr
@@ -40,7 +40,10 @@ note: if `Y` implemented `Clone`, you could clone the value
   --> $DIR/deriving-with-repr-packed.rs:16:1
    |
 LL | struct Y(usize);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL | struct X(Y);
+   |          - you could clone this value
    = note: `#[derive(Debug)]` triggers a move because taking references to the fields of a packed struct is undefined behaviour
    = note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
 
diff --git a/tests/ui/drop/dynamic-drop.rs b/tests/ui/drop/dynamic-drop.rs
index f848a1a340b..b695b5702d9 100644
--- a/tests/ui/drop/dynamic-drop.rs
+++ b/tests/ui/drop/dynamic-drop.rs
@@ -1,7 +1,7 @@
 //@ run-pass
 //@ needs-unwind
 
-#![feature(coroutines, coroutine_trait)]
+#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
 #![feature(if_let_guard)]
 
 #![allow(unused_assignments)]
@@ -176,7 +176,7 @@ fn vec_simple(a: &Allocator) {
 fn coroutine(a: &Allocator, run_count: usize) {
     assert!(run_count < 4);
 
-    let mut gen = || {
+    let mut gen = #[coroutine] || {
         (a.alloc(),
          yield a.alloc(),
          a.alloc(),
diff --git a/tests/ui/error-codes/E0504.stderr b/tests/ui/error-codes/E0504.stderr
index 900cb706bd9..343bca9a72e 100644
--- a/tests/ui/error-codes/E0504.stderr
+++ b/tests/ui/error-codes/E0504.stderr
@@ -18,7 +18,10 @@ note: if `FancyNum` implemented `Clone`, you could clone the value
   --> $DIR/E0504.rs:1:1
    |
 LL | struct FancyNum {
-   | ^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let fancy_ref = &fancy_num;
+   |                     ---------- you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/error-codes/E0505.stderr b/tests/ui/error-codes/E0505.stderr
index ce01298a70d..266df9ea32a 100644
--- a/tests/ui/error-codes/E0505.stderr
+++ b/tests/ui/error-codes/E0505.stderr
@@ -15,7 +15,10 @@ note: if `Value` implemented `Clone`, you could clone the value
   --> $DIR/E0505.rs:1:1
    |
 LL | struct Value {}
-   | ^^^^^^^^^^^^
+   | ^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         let _ref_to_val: &Value = &x;
+   |                                   -- you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/error-codes/E0507.stderr b/tests/ui/error-codes/E0507.stderr
index 60a4daa9d38..70d99ea2cce 100644
--- a/tests/ui/error-codes/E0507.stderr
+++ b/tests/ui/error-codes/E0507.stderr
@@ -15,7 +15,10 @@ note: if `TheDarkKnight` implemented `Clone`, you could clone the value
   --> $DIR/E0507.rs:3:1
    |
 LL | struct TheDarkKnight;
-   | ^^^^^^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     x.borrow().nothing_is_true();
+   |     ---------- you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/error-codes/E0508-fail.stderr b/tests/ui/error-codes/E0508-fail.stderr
index 96d3bcb67a5..fcfac399e0d 100644
--- a/tests/ui/error-codes/E0508-fail.stderr
+++ b/tests/ui/error-codes/E0508-fail.stderr
@@ -11,7 +11,10 @@ note: if `NonCopy` implemented `Clone`, you could clone the value
   --> $DIR/E0508-fail.rs:1:1
    |
 LL | struct NonCopy;
-   | ^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let _value = array[0];
+   |                  -------- you could clone this value
 help: consider borrowing here
    |
 LL |     let _value = &array[0];
diff --git a/tests/ui/error-codes/E0508.stderr b/tests/ui/error-codes/E0508.stderr
index c1b622e2432..b9fa0f4d17a 100644
--- a/tests/ui/error-codes/E0508.stderr
+++ b/tests/ui/error-codes/E0508.stderr
@@ -11,7 +11,10 @@ note: if `NonCopy` implemented `Clone`, you could clone the value
   --> $DIR/E0508.rs:1:1
    |
 LL | struct NonCopy;
-   | ^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let _value = array[0];
+   |                  -------- you could clone this value
 help: consider borrowing here
    |
 LL |     let _value = &array[0];
diff --git a/tests/ui/error-codes/E0509.stderr b/tests/ui/error-codes/E0509.stderr
index 75c372d0440..628a253e085 100644
--- a/tests/ui/error-codes/E0509.stderr
+++ b/tests/ui/error-codes/E0509.stderr
@@ -11,7 +11,10 @@ note: if `FancyNum` implemented `Clone`, you could clone the value
   --> $DIR/E0509.rs:1:1
    |
 LL | struct FancyNum {
-   | ^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let fancy_field = drop_struct.fancy;
+   |                       ----------------- you could clone this value
 help: consider borrowing here
    |
 LL |     let fancy_field = &drop_struct.fancy;
diff --git a/tests/ui/feature-gates/feature-gate-closure_track_caller.rs b/tests/ui/feature-gates/feature-gate-closure_track_caller.rs
index 93bf83ecf53..d90fb765a23 100644
--- a/tests/ui/feature-gates/feature-gate-closure_track_caller.rs
+++ b/tests/ui/feature-gates/feature-gate-closure_track_caller.rs
@@ -4,6 +4,6 @@
 
 fn main() {
     let _closure = #[track_caller] || {}; //~ `#[track_caller]` on closures
-    let _coroutine = #[track_caller] || { yield; }; //~ `#[track_caller]` on closures
+    let _coroutine = #[coroutine] #[track_caller] || { yield; }; //~ `#[track_caller]` on closures
     let _future = #[track_caller] async {}; //~ `#[track_caller]` on closures
 }
diff --git a/tests/ui/feature-gates/feature-gate-closure_track_caller.stderr b/tests/ui/feature-gates/feature-gate-closure_track_caller.stderr
index 17b5e6016a4..0b12b73fd1f 100644
--- a/tests/ui/feature-gates/feature-gate-closure_track_caller.stderr
+++ b/tests/ui/feature-gates/feature-gate-closure_track_caller.stderr
@@ -9,10 +9,10 @@ LL |     let _closure = #[track_caller] || {};
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
 error[E0658]: `#[track_caller]` on closures is currently unstable
-  --> $DIR/feature-gate-closure_track_caller.rs:7:22
+  --> $DIR/feature-gate-closure_track_caller.rs:7:35
    |
-LL |     let _coroutine = #[track_caller] || { yield; };
-   |                      ^^^^^^^^^^^^^^^
+LL |     let _coroutine = #[coroutine] #[track_caller] || { yield; };
+   |                                   ^^^^^^^^^^^^^^^
    |
    = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
    = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
diff --git a/tests/ui/feature-gates/feature-gate-coroutines.e2024.stderr b/tests/ui/feature-gates/feature-gate-coroutines.e2024.stderr
index 1cef163cef5..3bb48e4a37a 100644
--- a/tests/ui/feature-gates/feature-gate-coroutines.e2024.stderr
+++ b/tests/ui/feature-gates/feature-gate-coroutines.e2024.stderr
@@ -8,8 +8,19 @@ LL |     yield true;
    = help: add `#![feature(coroutines)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/feature-gate-coroutines.rs:5:5
+   |
+LL |     yield true;
+   |     ^^^^^^^^^^
+   |
+help: use `#[coroutine]` to make this closure a coroutine
+   |
+LL | #[coroutine] fn main() {
+   | ++++++++++++
+
 error[E0658]: yield syntax is experimental
-  --> $DIR/feature-gate-coroutines.rs:9:16
+  --> $DIR/feature-gate-coroutines.rs:10:16
    |
 LL |     let _ = || yield true;
    |                ^^^^^^^^^^
@@ -18,13 +29,24 @@ LL |     let _ = || yield true;
    = help: add `#![feature(coroutines)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/feature-gate-coroutines.rs:10:16
+   |
+LL |     let _ = || yield true;
+   |                ^^^^^^^^^^
+   |
+help: use `#[coroutine]` to make this closure a coroutine
+   |
+LL |     let _ = #[coroutine] || yield true;
+   |             ++++++++++++
+
 error[E0627]: yield expression outside of coroutine literal
   --> $DIR/feature-gate-coroutines.rs:5:5
    |
 LL |     yield true;
    |     ^^^^^^^^^^
 
-error: aborting due to 3 previous errors
+error: aborting due to 5 previous errors
 
 Some errors have detailed explanations: E0627, E0658.
 For more information about an error, try `rustc --explain E0627`.
diff --git a/tests/ui/feature-gates/feature-gate-coroutines.none.stderr b/tests/ui/feature-gates/feature-gate-coroutines.none.stderr
index 403f0549aef..65e7737ef84 100644
--- a/tests/ui/feature-gates/feature-gate-coroutines.none.stderr
+++ b/tests/ui/feature-gates/feature-gate-coroutines.none.stderr
@@ -9,7 +9,7 @@ LL |     yield true;
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
 error[E0658]: yield syntax is experimental
-  --> $DIR/feature-gate-coroutines.rs:9:16
+  --> $DIR/feature-gate-coroutines.rs:10:16
    |
 LL |     let _ = || yield true;
    |                ^^^^^^^^^^
@@ -19,7 +19,7 @@ LL |     let _ = || yield true;
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
 error[E0658]: yield syntax is experimental
-  --> $DIR/feature-gate-coroutines.rs:16:5
+  --> $DIR/feature-gate-coroutines.rs:18:5
    |
 LL |     yield;
    |     ^^^^^
@@ -29,7 +29,7 @@ LL |     yield;
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
 error[E0658]: yield syntax is experimental
-  --> $DIR/feature-gate-coroutines.rs:17:5
+  --> $DIR/feature-gate-coroutines.rs:19:5
    |
 LL |     yield 0;
    |     ^^^^^^^
@@ -49,8 +49,19 @@ LL |     yield true;
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
    = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/feature-gate-coroutines.rs:5:5
+   |
+LL |     yield true;
+   |     ^^^^^^^^^^
+   |
+help: use `#[coroutine]` to make this closure a coroutine
+   |
+LL | #[coroutine] fn main() {
+   | ++++++++++++
+
 error[E0658]: yield syntax is experimental
-  --> $DIR/feature-gate-coroutines.rs:9:16
+  --> $DIR/feature-gate-coroutines.rs:10:16
    |
 LL |     let _ = || yield true;
    |                ^^^^^^^^^^
@@ -60,13 +71,24 @@ LL |     let _ = || yield true;
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
    = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
+error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
+  --> $DIR/feature-gate-coroutines.rs:10:16
+   |
+LL |     let _ = || yield true;
+   |                ^^^^^^^^^^
+   |
+help: use `#[coroutine]` to make this closure a coroutine
+   |
+LL |     let _ = #[coroutine] || yield true;
+   |             ++++++++++++
+
 error[E0627]: yield expression outside of coroutine literal
   --> $DIR/feature-gate-coroutines.rs:5:5
    |
 LL |     yield true;
    |     ^^^^^^^^^^
 
-error: aborting due to 7 previous errors
+error: aborting due to 9 previous errors
 
 Some errors have detailed explanations: E0627, E0658.
 For more information about an error, try `rustc --explain E0627`.
diff --git a/tests/ui/feature-gates/feature-gate-coroutines.rs b/tests/ui/feature-gates/feature-gate-coroutines.rs
index b3df2351b68..28dce8596d3 100644
--- a/tests/ui/feature-gates/feature-gate-coroutines.rs
+++ b/tests/ui/feature-gates/feature-gate-coroutines.rs
@@ -5,9 +5,11 @@ fn main() {
     yield true; //~ ERROR yield syntax is experimental
                 //~^ ERROR yield expression outside of coroutine literal
                 //[none]~^^ ERROR yield syntax is experimental
+                //~^^^ ERROR `yield` can only be used
 
     let _ = || yield true; //~ ERROR yield syntax is experimental
     //[none]~^ ERROR yield syntax is experimental
+    //~^^ ERROR `yield` can only be used
 }
 
 #[cfg(FALSE)]
diff --git a/tests/ui/feature-gates/feature-gate-inline_const.rs b/tests/ui/feature-gates/feature-gate-inline_const.rs
deleted file mode 100644
index 43ff90d234c..00000000000
--- a/tests/ui/feature-gates/feature-gate-inline_const.rs
+++ /dev/null
@@ -1,6 +0,0 @@
-fn main() {
-    let _ = const {
-        //~^ ERROR inline-const is experimental [E0658]
-        true
-    };
-}
diff --git a/tests/ui/feature-gates/feature-gate-inline_const.stderr b/tests/ui/feature-gates/feature-gate-inline_const.stderr
deleted file mode 100644
index 6cf675065f3..00000000000
--- a/tests/ui/feature-gates/feature-gate-inline_const.stderr
+++ /dev/null
@@ -1,13 +0,0 @@
-error[E0658]: inline-const is experimental
-  --> $DIR/feature-gate-inline_const.rs:2:13
-   |
-LL |     let _ = const {
-   |             ^^^^^
-   |
-   = note: see issue #76001 <https://github.com/rust-lang/rust/issues/76001> for more information
-   = help: add `#![feature(inline_const)]` to the crate attributes to enable
-   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
-
-error: aborting due to 1 previous error
-
-For more information about this error, try `rustc --explain E0658`.
diff --git a/tests/ui/fn/fn_def_coercion.rs b/tests/ui/fn/fn_def_coercion.rs
new file mode 100644
index 00000000000..313be6f28cd
--- /dev/null
+++ b/tests/ui/fn/fn_def_coercion.rs
@@ -0,0 +1,58 @@
+//! Test that coercing between function items of the same function,
+//! but with different generic args succeeds in typeck, but then fails
+//! in borrowck when the lifetimes can't actually be merged.
+
+fn foo<T>(t: T) -> T {
+    t
+}
+
+fn f<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+    let mut x = foo::<&'a ()>; //~ ERROR: lifetime may not live long enough
+    x = foo::<&'b ()>; //~ ERROR: lifetime may not live long enough
+    x = foo::<&'c ()>;
+    x(a);
+    x(b);
+    x(c);
+}
+
+fn g<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+    let x = foo::<&'c ()>;
+    let _: &'c () = x(a); //~ ERROR lifetime may not live long enough
+}
+
+fn h<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+    let x = foo::<&'a ()>;
+    let _: &'a () = x(c);
+}
+
+fn i<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+    let mut x = foo::<&'c ()>;
+    x = foo::<&'b ()>; //~ ERROR lifetime may not live long enough
+    x = foo::<&'a ()>; //~ ERROR lifetime may not live long enough
+    x(a);
+    x(b);
+    x(c);
+}
+
+fn j<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+    let x = match true {
+        true => foo::<&'b ()>,  //~ ERROR lifetime may not live long enough
+        false => foo::<&'a ()>, //~ ERROR lifetime may not live long enough
+    };
+    x(a);
+    x(b);
+    x(c);
+}
+
+fn k<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+    let x = match true {
+        true => foo::<&'c ()>,
+        false => foo::<&'a ()>, //~ ERROR lifetime may not live long enough
+    };
+
+    x(a);
+    x(b); //~ ERROR lifetime may not live long enough
+    x(c);
+}
+
+fn main() {}
diff --git a/tests/ui/fn/fn_def_coercion.stderr b/tests/ui/fn/fn_def_coercion.stderr
new file mode 100644
index 00000000000..ec4a1bde7fd
--- /dev/null
+++ b/tests/ui/fn/fn_def_coercion.stderr
@@ -0,0 +1,154 @@
+error: lifetime may not live long enough
+  --> $DIR/fn_def_coercion.rs:10:17
+   |
+LL | fn f<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+   |      --  -- lifetime `'b` defined here
+   |      |
+   |      lifetime `'a` defined here
+LL |     let mut x = foo::<&'a ()>;
+   |                 ^^^^^^^^^^^^^ assignment requires that `'a` must outlive `'b`
+   |
+   = help: consider adding the following bound: `'a: 'b`
+   = note: requirement occurs because of a function pointer to `foo`
+   = note: the function `foo` is invariant over the parameter `T`
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+error: lifetime may not live long enough
+  --> $DIR/fn_def_coercion.rs:11:5
+   |
+LL | fn f<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+   |      --  -- lifetime `'b` defined here
+   |      |
+   |      lifetime `'a` defined here
+LL |     let mut x = foo::<&'a ()>;
+LL |     x = foo::<&'b ()>;
+   |     ^^^^^^^^^^^^^^^^^ assignment requires that `'b` must outlive `'a`
+   |
+   = help: consider adding the following bound: `'b: 'a`
+   = note: requirement occurs because of a function pointer to `foo`
+   = note: the function `foo` is invariant over the parameter `T`
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+help: `'a` and `'b` must be the same: replace one with the other
+
+error: lifetime may not live long enough
+  --> $DIR/fn_def_coercion.rs:20:12
+   |
+LL | fn g<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+   |      --      -- lifetime `'c` defined here
+   |      |
+   |      lifetime `'a` defined here
+LL |     let x = foo::<&'c ()>;
+LL |     let _: &'c () = x(a);
+   |            ^^^^^^ type annotation requires that `'a` must outlive `'c`
+   |
+   = help: consider adding the following bound: `'a: 'c`
+
+error: lifetime may not live long enough
+  --> $DIR/fn_def_coercion.rs:30:5
+   |
+LL | fn i<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+   |      --  -- lifetime `'b` defined here
+   |      |
+   |      lifetime `'a` defined here
+LL |     let mut x = foo::<&'c ()>;
+LL |     x = foo::<&'b ()>;
+   |     ^^^^^^^^^^^^^^^^^ assignment requires that `'b` must outlive `'a`
+   |
+   = help: consider adding the following bound: `'b: 'a`
+   = note: requirement occurs because of a function pointer to `foo`
+   = note: the function `foo` is invariant over the parameter `T`
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+error: lifetime may not live long enough
+  --> $DIR/fn_def_coercion.rs:31:5
+   |
+LL | fn i<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+   |      --  -- lifetime `'b` defined here
+   |      |
+   |      lifetime `'a` defined here
+...
+LL |     x = foo::<&'a ()>;
+   |     ^^^^^^^^^^^^^^^^^ assignment requires that `'a` must outlive `'b`
+   |
+   = help: consider adding the following bound: `'a: 'b`
+   = note: requirement occurs because of a function pointer to `foo`
+   = note: the function `foo` is invariant over the parameter `T`
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+help: `'a` and `'b` must be the same: replace one with the other
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
+
+error: lifetime may not live long enough
+  --> $DIR/fn_def_coercion.rs:39:17
+   |
+LL | fn j<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+   |      --  -- lifetime `'b` defined here
+   |      |
+   |      lifetime `'a` defined here
+LL |     let x = match true {
+LL |         true => foo::<&'b ()>,
+   |                 ^^^^^^^^^^^^^ assignment requires that `'b` must outlive `'a`
+   |
+   = help: consider adding the following bound: `'b: 'a`
+   = note: requirement occurs because of a function pointer to `foo`
+   = note: the function `foo` is invariant over the parameter `T`
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+error: lifetime may not live long enough
+  --> $DIR/fn_def_coercion.rs:40:18
+   |
+LL | fn j<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+   |      --  -- lifetime `'b` defined here
+   |      |
+   |      lifetime `'a` defined here
+...
+LL |         false => foo::<&'a ()>,
+   |                  ^^^^^^^^^^^^^ assignment requires that `'a` must outlive `'b`
+   |
+   = help: consider adding the following bound: `'a: 'b`
+   = note: requirement occurs because of a function pointer to `foo`
+   = note: the function `foo` is invariant over the parameter `T`
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+help: `'a` and `'b` must be the same: replace one with the other
+   |
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
+
+error: lifetime may not live long enough
+  --> $DIR/fn_def_coercion.rs:50:18
+   |
+LL | fn k<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+   |      --      -- lifetime `'c` defined here
+   |      |
+   |      lifetime `'a` defined here
+...
+LL |         false => foo::<&'a ()>,
+   |                  ^^^^^^^^^^^^^ assignment requires that `'a` must outlive `'c`
+   |
+   = help: consider adding the following bound: `'a: 'c`
+   = note: requirement occurs because of a function pointer to `foo`
+   = note: the function `foo` is invariant over the parameter `T`
+   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
+
+error: lifetime may not live long enough
+  --> $DIR/fn_def_coercion.rs:54:5
+   |
+LL | fn k<'a, 'b, 'c: 'a + 'b>(a: &'a (), b: &'b (), c: &'c ()) {
+   |      --  -- lifetime `'b` defined here
+   |      |
+   |      lifetime `'a` defined here
+...
+LL |     x(b);
+   |     ^^^^ argument requires that `'b` must outlive `'a`
+   |
+   = help: consider adding the following bound: `'b: 'a`
+
+help: the following changes may resolve your lifetime errors
+   |
+   = help: add bound `'a: 'c`
+   = help: add bound `'b: 'a`
+
+error: aborting due to 9 previous errors
+
diff --git a/tests/ui/fn/fn_def_opaque_coercion.rs b/tests/ui/fn/fn_def_opaque_coercion.rs
new file mode 100644
index 00000000000..0a8810cf4f8
--- /dev/null
+++ b/tests/ui/fn/fn_def_opaque_coercion.rs
@@ -0,0 +1,69 @@
+//! Test that coercing between function items of the same function,
+//! but with different generic args works.
+
+//@check-pass
+
+#![feature(type_alias_impl_trait)]
+
+fn foo<T>(t: T) -> T {
+    t
+}
+
+type F = impl Sized;
+
+fn f(a: F) {
+    let mut x = foo::<F>;
+    x = foo::<()>;
+    x(a);
+    x(());
+}
+
+type G = impl Sized;
+
+fn g(a: G) {
+    let x = foo::<()>;
+    let _: () = x(a);
+}
+
+type H = impl Sized;
+
+fn h(a: H) {
+    let x = foo::<H>;
+    let _: H = x(());
+}
+
+type I = impl Sized;
+
+fn i(a: I) {
+    let mut x = foo::<()>;
+    x = foo::<I>;
+    x(a);
+    x(());
+}
+
+type J = impl Sized;
+
+fn j(a: J) {
+    let x = match true {
+        true => foo::<J>,
+        false => foo::<()>,
+    };
+    x(a);
+    x(());
+}
+
+fn k() -> impl Sized {
+    fn bind<T, F: FnOnce(T) -> T>(_: T, f: F) -> F {
+        f
+    }
+    let x = match true {
+        true => {
+            let f = foo;
+            bind(k(), f)
+        }
+        false => foo::<()>,
+    };
+    todo!()
+}
+
+fn main() {}
diff --git a/tests/ui/fn/suggest-return-closure.rs b/tests/ui/fn/suggest-return-closure.rs
index 81f20272867..30e25ca8edc 100644
--- a/tests/ui/fn/suggest-return-closure.rs
+++ b/tests/ui/fn/suggest-return-closure.rs
@@ -18,6 +18,7 @@ fn fn_mut() -> _ {
     //~| NOTE for more information on `Fn` traits and closure types
     let x = String::new();
     //~^ HELP: consider changing this to be mutable
+    //~| NOTE binding `x` declared here
     |c| { //~ NOTE: value captured here
         x.push(c);
         //~^ ERROR: does not live long enough
diff --git a/tests/ui/fn/suggest-return-closure.stderr b/tests/ui/fn/suggest-return-closure.stderr
index 8e80a11fe1b..d276ce8be2b 100644
--- a/tests/ui/fn/suggest-return-closure.stderr
+++ b/tests/ui/fn/suggest-return-closure.stderr
@@ -21,7 +21,7 @@ LL | fn fn_mut() -> _ {
    = note: for more information on `Fn` traits and closure types, see https://doc.rust-lang.org/book/ch13-01-closures.html
 
 error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
-  --> $DIR/suggest-return-closure.rs:31:13
+  --> $DIR/suggest-return-closure.rs:32:13
    |
 LL | fn fun() -> _ {
    |             ^
@@ -32,7 +32,7 @@ LL | fn fun() -> _ {
    = note: for more information on `Fn` traits and closure types, see https://doc.rust-lang.org/book/ch13-01-closures.html
 
 error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
-  --> $DIR/suggest-return-closure.rs:22:9
+  --> $DIR/suggest-return-closure.rs:23:9
    |
 LL |     let x = String::new();
    |         - help: consider changing this to be mutable: `mut x`
@@ -41,8 +41,11 @@ LL |         x.push(c);
    |         ^ cannot borrow as mutable
 
 error[E0597]: `x` does not live long enough
-  --> $DIR/suggest-return-closure.rs:22:9
+  --> $DIR/suggest-return-closure.rs:23:9
    |
+LL |     let x = String::new();
+   |         - binding `x` declared here
+...
 LL |     |c| {
    |     --- value captured here
 LL |         x.push(c);
diff --git a/tests/ui/impl-trait/issues/issue-58504.rs b/tests/ui/impl-trait/issues/issue-58504.rs
index 4f7a35e81b8..856e1297e58 100644
--- a/tests/ui/impl-trait/issues/issue-58504.rs
+++ b/tests/ui/impl-trait/issues/issue-58504.rs
@@ -3,7 +3,7 @@
 use std::ops::Coroutine;
 
 fn mk_gen() -> impl Coroutine<Return=!, Yield=()> {
-    || { loop { yield; } }
+    #[coroutine] || { loop { yield; } }
 }
 
 fn main() {
diff --git a/tests/ui/impl-trait/lifetimes.rs b/tests/ui/impl-trait/lifetimes.rs
index 93a4801fa40..df64b685eab 100644
--- a/tests/ui/impl-trait/lifetimes.rs
+++ b/tests/ui/impl-trait/lifetimes.rs
@@ -115,7 +115,7 @@ impl<'unnecessary_lifetime> MyVec {
     }
 
     fn coroutine_doesnt_capture_unnecessary_lifetime<'s: 's>() -> impl Sized {
-        || yield
+        #[coroutine] || yield
     }
 }
 
diff --git a/tests/ui/impl-trait/normalize-tait-in-const.rs b/tests/ui/impl-trait/normalize-tait-in-const.rs
index ccd073b8070..422c2e439cf 100644
--- a/tests/ui/impl-trait/normalize-tait-in-const.rs
+++ b/tests/ui/impl-trait/normalize-tait-in-const.rs
@@ -3,7 +3,6 @@
 #![feature(type_alias_impl_trait)]
 #![feature(const_trait_impl)]
 #![feature(const_refs_to_cell)]
-#![feature(inline_const)]
 
 use std::marker::Destruct;
 
diff --git a/tests/ui/impl-trait/normalize-tait-in-const.stderr b/tests/ui/impl-trait/normalize-tait-in-const.stderr
index 7ae8306d74d..fbd41b61730 100644
--- a/tests/ui/impl-trait/normalize-tait-in-const.stderr
+++ b/tests/ui/impl-trait/normalize-tait-in-const.stderr
@@ -1,11 +1,11 @@
 error: `~const` can only be applied to `#[const_trait]` traits
-  --> $DIR/normalize-tait-in-const.rs:25:42
+  --> $DIR/normalize-tait-in-const.rs:24:42
    |
 LL | const fn with_positive<F: ~const for<'a> Fn(&'a Alias<'a>) + ~const Destruct>(fun: F) {
    |                                          ^^^^^^^^^^^^^^^^^
 
 error[E0015]: cannot call non-const closure in constant functions
-  --> $DIR/normalize-tait-in-const.rs:26:5
+  --> $DIR/normalize-tait-in-const.rs:25:5
    |
 LL |     fun(filter_positive());
    |     ^^^^^^^^^^^^^^^^^^^^^^
@@ -21,7 +21,7 @@ LL + #![feature(effects)]
    |
 
 error[E0493]: destructor of `F` cannot be evaluated at compile-time
-  --> $DIR/normalize-tait-in-const.rs:25:79
+  --> $DIR/normalize-tait-in-const.rs:24:79
    |
 LL | const fn with_positive<F: ~const for<'a> Fn(&'a Alias<'a>) + ~const Destruct>(fun: F) {
    |                                                                               ^^^ the destructor for this type cannot be evaluated in constant functions
diff --git a/tests/ui/impl-trait/recursive-coroutine-boxed.next.stderr b/tests/ui/impl-trait/recursive-coroutine-boxed.next.stderr
index c0b399746ea..96db2030a40 100644
--- a/tests/ui/impl-trait/recursive-coroutine-boxed.next.stderr
+++ b/tests/ui/impl-trait/recursive-coroutine-boxed.next.stderr
@@ -1,5 +1,5 @@
 error[E0282]: type annotations needed
-  --> $DIR/recursive-coroutine-boxed.rs:14:23
+  --> $DIR/recursive-coroutine-boxed.rs:15:23
    |
 LL |         let mut gen = Box::pin(foo());
    |                       ^^^^^^^^ cannot infer type of the type parameter `T` declared on the struct `Box`
@@ -13,7 +13,7 @@ LL |         let mut gen = Box::<T>::pin(foo());
    |                          +++++
 
 error[E0308]: mismatched types
-  --> $DIR/recursive-coroutine-boxed.rs:13:5
+  --> $DIR/recursive-coroutine-boxed.rs:14:18
    |
 LL |   fn foo() -> impl Coroutine<Yield = (), Return = ()> {
    |               ---------------------------------------
@@ -21,7 +21,8 @@ LL |   fn foo() -> impl Coroutine<Yield = (), Return = ()> {
    |               the expected opaque type
    |               expected `impl Coroutine<Yield = (), Return = ()>` because of return type
 ...
-LL | /     || {
+LL |       #[coroutine] || {
+   |  __________________^
 LL | |         let mut gen = Box::pin(foo());
 LL | |
 LL | |         let mut r = gen.as_mut().resume(());
@@ -31,7 +32,7 @@ LL | |     }
    | |_____^ types differ
    |
    = note: expected opaque type `impl Coroutine<Yield = (), Return = ()>`
-                found coroutine `{coroutine@$DIR/recursive-coroutine-boxed.rs:13:5: 13:7}`
+                found coroutine `{coroutine@$DIR/recursive-coroutine-boxed.rs:14:18: 14:20}`
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/impl-trait/recursive-coroutine-boxed.rs b/tests/ui/impl-trait/recursive-coroutine-boxed.rs
index 02c75be0f3a..24a77d73114 100644
--- a/tests/ui/impl-trait/recursive-coroutine-boxed.rs
+++ b/tests/ui/impl-trait/recursive-coroutine-boxed.rs
@@ -10,7 +10,8 @@ fn foo() -> impl Coroutine<Yield = (), Return = ()> {
     // FIXME(-Znext-solver): this fails with a mismatched types as the
     // hidden type of the opaque ends up as {type error}. We should not
     // emit errors for such goals.
-    || { //[next]~ ERROR mismatched types
+
+    #[coroutine] || { //[next]~ ERROR mismatched types
         let mut gen = Box::pin(foo());
         //[next]~^ ERROR type annotations needed
         let mut r = gen.as_mut().resume(());
diff --git a/tests/ui/impl-trait/recursive-coroutine-indirect.current.stderr b/tests/ui/impl-trait/recursive-coroutine-indirect.current.stderr
index ee87c483d0d..9814187e179 100644
--- a/tests/ui/impl-trait/recursive-coroutine-indirect.current.stderr
+++ b/tests/ui/impl-trait/recursive-coroutine-indirect.current.stderr
@@ -1,8 +1,8 @@
 error[E0733]: recursion in a coroutine requires boxing
-  --> $DIR/recursive-coroutine-indirect.rs:11:5
+  --> $DIR/recursive-coroutine-indirect.rs:11:18
    |
-LL |     move || {
-   |     ^^^^^^^
+LL |     #[coroutine] move || {
+   |                  ^^^^^^^
 LL |         let x = coroutine_hold();
    |             - recursive call here
 
diff --git a/tests/ui/impl-trait/recursive-coroutine-indirect.next.stderr b/tests/ui/impl-trait/recursive-coroutine-indirect.next.stderr
index ee87c483d0d..9814187e179 100644
--- a/tests/ui/impl-trait/recursive-coroutine-indirect.next.stderr
+++ b/tests/ui/impl-trait/recursive-coroutine-indirect.next.stderr
@@ -1,8 +1,8 @@
 error[E0733]: recursion in a coroutine requires boxing
-  --> $DIR/recursive-coroutine-indirect.rs:11:5
+  --> $DIR/recursive-coroutine-indirect.rs:11:18
    |
-LL |     move || {
-   |     ^^^^^^^
+LL |     #[coroutine] move || {
+   |                  ^^^^^^^
 LL |         let x = coroutine_hold();
    |             - recursive call here
 
diff --git a/tests/ui/impl-trait/recursive-coroutine-indirect.rs b/tests/ui/impl-trait/recursive-coroutine-indirect.rs
index bba9792fe3c..cec2176049b 100644
--- a/tests/ui/impl-trait/recursive-coroutine-indirect.rs
+++ b/tests/ui/impl-trait/recursive-coroutine-indirect.rs
@@ -8,7 +8,7 @@
 #![feature(coroutines)]
 #![allow(unconditional_recursion)]
 fn coroutine_hold() -> impl Sized {
-    move || { //~ ERROR recursion in a coroutine requires boxing
+    #[coroutine] move || { //~ ERROR recursion in a coroutine requires boxing
         let x = coroutine_hold();
         yield;
         x;
diff --git a/tests/ui/impl-trait/recursive-impl-trait-type-indirect.rs b/tests/ui/impl-trait/recursive-impl-trait-type-indirect.rs
index 432f80a1763..8b9dac0e29b 100644
--- a/tests/ui/impl-trait/recursive-impl-trait-type-indirect.rs
+++ b/tests/ui/impl-trait/recursive-impl-trait-type-indirect.rs
@@ -57,6 +57,8 @@ fn coroutine_sig() -> impl Sized {
 fn coroutine_capture() -> impl Sized {
     //~^ ERROR
     let x = coroutine_capture();
+
+    #[coroutine]
     move || {
         yield;
         x;
diff --git a/tests/ui/impl-trait/recursive-impl-trait-type-indirect.stderr b/tests/ui/impl-trait/recursive-impl-trait-type-indirect.stderr
index d5b8c531fd6..2d2731e4368 100644
--- a/tests/ui/impl-trait/recursive-impl-trait-type-indirect.stderr
+++ b/tests/ui/impl-trait/recursive-impl-trait-type-indirect.stderr
@@ -98,10 +98,10 @@ LL | |         yield;
 LL | |         x;
    | |         - coroutine captures itself here
 LL | |     }
-   | |_____- returning here with type `{coroutine@$DIR/recursive-impl-trait-type-indirect.rs:60:5: 60:12}`
+   | |_____- returning here with type `{coroutine@$DIR/recursive-impl-trait-type-indirect.rs:62:5: 62:12}`
 
 error[E0720]: cannot resolve opaque type
-  --> $DIR/recursive-impl-trait-type-indirect.rs:66:35
+  --> $DIR/recursive-impl-trait-type-indirect.rs:68:35
    |
 LL | fn substs_change<T: 'static>() -> impl Sized {
    |                                   ^^^^^^^^^^ recursive opaque type
@@ -110,7 +110,7 @@ LL |     (substs_change::<&T>(),)
    |     ------------------------ returning here with type `(impl Sized,)`
 
 error[E0720]: cannot resolve opaque type
-  --> $DIR/recursive-impl-trait-type-indirect.rs:76:26
+  --> $DIR/recursive-impl-trait-type-indirect.rs:78:26
    |
 LL | fn mutual_recursion() -> impl Sync {
    |                          ^^^^^^^^^ recursive opaque type
@@ -122,7 +122,7 @@ LL | fn mutual_recursion_b() -> impl Sized {
    |                            ---------- returning this opaque type `impl Sized`
 
 error[E0720]: cannot resolve opaque type
-  --> $DIR/recursive-impl-trait-type-indirect.rs:81:28
+  --> $DIR/recursive-impl-trait-type-indirect.rs:83:28
    |
 LL | fn mutual_recursion() -> impl Sync {
    |                          --------- returning this opaque type `impl Sync`
diff --git a/tests/ui/inline-const/const-expr-array-init.rs b/tests/ui/inline-const/const-expr-array-init.rs
index 075c27c1cc9..eb126b61f2d 100644
--- a/tests/ui/inline-const/const-expr-array-init.rs
+++ b/tests/ui/inline-const/const-expr-array-init.rs
@@ -1,7 +1,5 @@
 //@ build-pass
 
-#![feature(inline_const)]
-
 use std::cell::Cell;
 
 fn main() {
diff --git a/tests/ui/inline-const/const-expr-basic.rs b/tests/ui/inline-const/const-expr-basic.rs
index 6a19cc656d0..7f769d2b5c3 100644
--- a/tests/ui/inline-const/const-expr-basic.rs
+++ b/tests/ui/inline-const/const-expr-basic.rs
@@ -1,7 +1,5 @@
 //@ run-pass
 
-#![feature(inline_const)]
-
 fn foo() -> i32 {
     const {
         let x = 5 + 10;
diff --git a/tests/ui/inline-const/const-expr-generic-err.rs b/tests/ui/inline-const/const-expr-generic-err.rs
index 3c4bbcb3dc9..3249e826a96 100644
--- a/tests/ui/inline-const/const-expr-generic-err.rs
+++ b/tests/ui/inline-const/const-expr-generic-err.rs
@@ -1,5 +1,4 @@
 //@ build-fail
-#![feature(inline_const)]
 
 fn foo<T>() {
     const { assert!(std::mem::size_of::<T>() == 0); } //~ ERROR E0080
diff --git a/tests/ui/inline-const/const-expr-generic-err.stderr b/tests/ui/inline-const/const-expr-generic-err.stderr
index 7331c7f18e9..dcd6b62bbfc 100644
--- a/tests/ui/inline-const/const-expr-generic-err.stderr
+++ b/tests/ui/inline-const/const-expr-generic-err.stderr
@@ -1,37 +1,37 @@
 error[E0080]: evaluation of `foo::<i32>::{constant#0}` failed
-  --> $DIR/const-expr-generic-err.rs:5:13
+  --> $DIR/const-expr-generic-err.rs:4:13
    |
 LL |     const { assert!(std::mem::size_of::<T>() == 0); }
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the evaluated program panicked at 'assertion failed: std::mem::size_of::<T>() == 0', $DIR/const-expr-generic-err.rs:5:13
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the evaluated program panicked at 'assertion failed: std::mem::size_of::<T>() == 0', $DIR/const-expr-generic-err.rs:4:13
    |
    = note: this error originates in the macro `assert` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 note: erroneous constant encountered
-  --> $DIR/const-expr-generic-err.rs:5:5
+  --> $DIR/const-expr-generic-err.rs:4:5
    |
 LL |     const { assert!(std::mem::size_of::<T>() == 0); }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 note: the above error was encountered while instantiating `fn foo::<i32>`
-  --> $DIR/const-expr-generic-err.rs:13:5
+  --> $DIR/const-expr-generic-err.rs:12:5
    |
 LL |     foo::<i32>();
    |     ^^^^^^^^^^^^
 
 error[E0080]: evaluation of `bar::<0>::{constant#0}` failed
-  --> $DIR/const-expr-generic-err.rs:9:13
+  --> $DIR/const-expr-generic-err.rs:8:13
    |
 LL |     const { N - 1 }
    |             ^^^^^ attempt to compute `0_usize - 1_usize`, which would overflow
 
 note: erroneous constant encountered
-  --> $DIR/const-expr-generic-err.rs:9:5
+  --> $DIR/const-expr-generic-err.rs:8:5
    |
 LL |     const { N - 1 }
    |     ^^^^^^^^^^^^^^^
 
 note: erroneous constant encountered
-  --> $DIR/const-expr-generic-err.rs:9:5
+  --> $DIR/const-expr-generic-err.rs:8:5
    |
 LL |     const { N - 1 }
    |     ^^^^^^^^^^^^^^^
@@ -39,7 +39,7 @@ LL |     const { N - 1 }
    = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 note: the above error was encountered while instantiating `fn bar::<0>`
-  --> $DIR/const-expr-generic-err.rs:14:5
+  --> $DIR/const-expr-generic-err.rs:13:5
    |
 LL |     bar::<0>();
    |     ^^^^^^^^^^
diff --git a/tests/ui/inline-const/const-expr-generic-err2.rs b/tests/ui/inline-const/const-expr-generic-err2.rs
index e097cbe9dd6..49cbdbfda5d 100644
--- a/tests/ui/inline-const/const-expr-generic-err2.rs
+++ b/tests/ui/inline-const/const-expr-generic-err2.rs
@@ -1,5 +1,3 @@
-#![feature(inline_const)]
-
 fn foo<T>() {
     let _ = [0u8; const { std::mem::size_of::<T>() }];
     //~^ ERROR: constant expression depends on a generic parameter
diff --git a/tests/ui/inline-const/const-expr-generic-err2.stderr b/tests/ui/inline-const/const-expr-generic-err2.stderr
index 5876a6c9e19..c6d77593c46 100644
--- a/tests/ui/inline-const/const-expr-generic-err2.stderr
+++ b/tests/ui/inline-const/const-expr-generic-err2.stderr
@@ -1,5 +1,5 @@
 error: constant expression depends on a generic parameter
-  --> $DIR/const-expr-generic-err2.rs:4:19
+  --> $DIR/const-expr-generic-err2.rs:2:19
    |
 LL |     let _ = [0u8; const { std::mem::size_of::<T>() }];
    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/inline-const/const-expr-generic.rs b/tests/ui/inline-const/const-expr-generic.rs
index e634e1d4a47..0c33b02d3a2 100644
--- a/tests/ui/inline-const/const-expr-generic.rs
+++ b/tests/ui/inline-const/const-expr-generic.rs
@@ -1,5 +1,4 @@
 //@ check-pass
-#![feature(inline_const)]
 
 fn foo<T>() -> usize {
     const { std::mem::size_of::<T>() }
diff --git a/tests/ui/inline-const/const-expr-inference.rs b/tests/ui/inline-const/const-expr-inference.rs
index f3b97d3430e..99cea3204a1 100644
--- a/tests/ui/inline-const/const-expr-inference.rs
+++ b/tests/ui/inline-const/const-expr-inference.rs
@@ -1,7 +1,5 @@
 //@ check-pass
 
-#![feature(inline_const)]
-
 pub fn todo<T>() -> T {
     const { todo!() }
 }
diff --git a/tests/ui/inline-const/const-expr-lifetime-err.rs b/tests/ui/inline-const/const-expr-lifetime-err.rs
index 0a032a7338a..df1e5fcb473 100644
--- a/tests/ui/inline-const/const-expr-lifetime-err.rs
+++ b/tests/ui/inline-const/const-expr-lifetime-err.rs
@@ -1,5 +1,4 @@
 #![feature(const_mut_refs)]
-#![feature(inline_const)]
 
 use std::marker::PhantomData;
 
diff --git a/tests/ui/inline-const/const-expr-lifetime-err.stderr b/tests/ui/inline-const/const-expr-lifetime-err.stderr
index 75877bc093a..f97e2d25e6c 100644
--- a/tests/ui/inline-const/const-expr-lifetime-err.stderr
+++ b/tests/ui/inline-const/const-expr-lifetime-err.stderr
@@ -1,5 +1,5 @@
 error[E0597]: `y` does not live long enough
-  --> $DIR/const-expr-lifetime-err.rs:23:30
+  --> $DIR/const-expr-lifetime-err.rs:22:30
    |
 LL | fn foo<'a>() {
    |        -- lifetime `'a` defined here
diff --git a/tests/ui/inline-const/const-expr-lifetime.rs b/tests/ui/inline-const/const-expr-lifetime.rs
index 5dac17645d7..071e724a0fa 100644
--- a/tests/ui/inline-const/const-expr-lifetime.rs
+++ b/tests/ui/inline-const/const-expr-lifetime.rs
@@ -1,7 +1,6 @@
 //@ run-pass
 
 #![feature(const_mut_refs)]
-#![feature(inline_const)]
 
 use std::marker::PhantomData;
 
diff --git a/tests/ui/inline-const/const-expr-macro.rs b/tests/ui/inline-const/const-expr-macro.rs
index bf3cb3c3320..cf07eb12f5a 100644
--- a/tests/ui/inline-const/const-expr-macro.rs
+++ b/tests/ui/inline-const/const-expr-macro.rs
@@ -1,7 +1,5 @@
 //@ run-pass
 
-#![feature(inline_const)]
-
 macro_rules! do_const_block{
     ($val:block) => { const $val }
 }
diff --git a/tests/ui/inline-const/const-expr-reference.rs b/tests/ui/inline-const/const-expr-reference.rs
index b3753b0d371..208271e37c3 100644
--- a/tests/ui/inline-const/const-expr-reference.rs
+++ b/tests/ui/inline-const/const-expr-reference.rs
@@ -1,7 +1,5 @@
 //@ run-pass
 
-#![feature(inline_const)]
-
 const fn bar() -> i32 {
     const {
         2 + 3
diff --git a/tests/ui/inline-const/const-match-pat-lifetime.rs b/tests/ui/inline-const/const-match-pat-lifetime.rs
index f909e68e7be..590c426c773 100644
--- a/tests/ui/inline-const/const-match-pat-lifetime.rs
+++ b/tests/ui/inline-const/const-match-pat-lifetime.rs
@@ -1,7 +1,6 @@
 //@ run-pass
 
 #![feature(const_mut_refs)]
-#![feature(inline_const)]
 #![feature(inline_const_pat)]
 
 use std::marker::PhantomData;
diff --git a/tests/ui/inline-const/elided-lifetime-being-infer-vars.rs b/tests/ui/inline-const/elided-lifetime-being-infer-vars.rs
index a1c3c61484a..e0a889ac347 100644
--- a/tests/ui/inline-const/elided-lifetime-being-infer-vars.rs
+++ b/tests/ui/inline-const/elided-lifetime-being-infer-vars.rs
@@ -1,7 +1,5 @@
 //@ check-pass
 
-#![feature(inline_const)]
-
 fn main() {
     let _my_usize = const {
         let a = 10_usize;
diff --git a/tests/ui/inline-const/expr-unsafe-err.rs b/tests/ui/inline-const/expr-unsafe-err.rs
index a05a2945168..d53d84b944f 100644
--- a/tests/ui/inline-const/expr-unsafe-err.rs
+++ b/tests/ui/inline-const/expr-unsafe-err.rs
@@ -1,4 +1,3 @@
-#![feature(inline_const)]
 const unsafe fn require_unsafe() -> usize {
     1
 }
diff --git a/tests/ui/inline-const/expr-unsafe-err.stderr b/tests/ui/inline-const/expr-unsafe-err.stderr
index 45f850d1f99..13a408b971c 100644
--- a/tests/ui/inline-const/expr-unsafe-err.stderr
+++ b/tests/ui/inline-const/expr-unsafe-err.stderr
@@ -1,5 +1,5 @@
 error[E0133]: call to unsafe function `require_unsafe` is unsafe and requires unsafe function or block
-  --> $DIR/expr-unsafe-err.rs:8:9
+  --> $DIR/expr-unsafe-err.rs:7:9
    |
 LL |         require_unsafe();
    |         ^^^^^^^^^^^^^^^^ call to unsafe function
diff --git a/tests/ui/inline-const/expr-unsafe.rs b/tests/ui/inline-const/expr-unsafe.rs
index f9d1450503e..cdd101f3e08 100644
--- a/tests/ui/inline-const/expr-unsafe.rs
+++ b/tests/ui/inline-const/expr-unsafe.rs
@@ -1,7 +1,7 @@
 //@ check-pass
 
 #![warn(unused_unsafe)]
-#![feature(inline_const)]
+
 const unsafe fn require_unsafe() -> usize { 1 }
 
 fn main() {
diff --git a/tests/ui/inline-const/expr-with-block-err.rs b/tests/ui/inline-const/expr-with-block-err.rs
index f7547742ddc..6f850757558 100644
--- a/tests/ui/inline-const/expr-with-block-err.rs
+++ b/tests/ui/inline-const/expr-with-block-err.rs
@@ -1,5 +1,3 @@
-#![feature(inline_const)]
-
 fn main() {
     const { 2 } - const { 1 };
     //~^ ERROR mismatched types
diff --git a/tests/ui/inline-const/expr-with-block-err.stderr b/tests/ui/inline-const/expr-with-block-err.stderr
index a46d7395045..f127c11e9b7 100644
--- a/tests/ui/inline-const/expr-with-block-err.stderr
+++ b/tests/ui/inline-const/expr-with-block-err.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/expr-with-block-err.rs:4:13
+  --> $DIR/expr-with-block-err.rs:2:13
    |
 LL |     const { 2 } - const { 1 };
    |             ^ expected `()`, found integer
diff --git a/tests/ui/inline-const/expr-with-block.rs b/tests/ui/inline-const/expr-with-block.rs
index 07a1c9a10f5..a32afbcffad 100644
--- a/tests/ui/inline-const/expr-with-block.rs
+++ b/tests/ui/inline-const/expr-with-block.rs
@@ -1,5 +1,5 @@
 //@ check-pass
-#![feature(inline_const)]
+
 fn main() {
     match true {
         true => const {}
diff --git a/tests/ui/inline-const/instance-doesnt-depend-on-type.rs b/tests/ui/inline-const/instance-doesnt-depend-on-type.rs
index e69106a43af..c53aab60b06 100644
--- a/tests/ui/inline-const/instance-doesnt-depend-on-type.rs
+++ b/tests/ui/inline-const/instance-doesnt-depend-on-type.rs
@@ -1,8 +1,6 @@
 //@ check-pass
 // issue: 114660
 
-#![feature(inline_const)]
-
 fn main() {
     const { core::mem::transmute::<u8, u8> };
     // Don't resolve the instance of this inline constant to be an intrinsic,
diff --git a/tests/ui/inline-const/interpolated.rs b/tests/ui/inline-const/interpolated.rs
index 582900e7aa0..38ed2a042e0 100644
--- a/tests/ui/inline-const/interpolated.rs
+++ b/tests/ui/inline-const/interpolated.rs
@@ -1,7 +1,5 @@
 //@ check-pass
 
-#![feature(inline_const)]
-
 // This used to be unsupported since the parser first tries to check if we have
 // any nested items, and then checks for statements (and expressions). The heuristic
 // that we were using to detect the beginning of a const item was incorrect, so
diff --git a/tests/ui/inline-const/promotion.rs b/tests/ui/inline-const/promotion.rs
index 242959c6b51..2cfb8a0d19f 100644
--- a/tests/ui/inline-const/promotion.rs
+++ b/tests/ui/inline-const/promotion.rs
@@ -1,4 +1,3 @@
-#![feature(inline_const)]
 #![allow(arithmetic_overflow, unconditional_panic)]
 
 // The only way to have promoteds that fail is in `const fn` called from `const`/`static`.
diff --git a/tests/ui/inline-const/promotion.stderr b/tests/ui/inline-const/promotion.stderr
index 7f06b97818b..4e914c9e087 100644
--- a/tests/ui/inline-const/promotion.stderr
+++ b/tests/ui/inline-const/promotion.stderr
@@ -1,5 +1,5 @@
 error[E0716]: temporary value dropped while borrowed
-  --> $DIR/promotion.rs:17:37
+  --> $DIR/promotion.rs:16:37
    |
 LL |             let _x: &'static i32 = &div_by_zero();
    |                     ------------    ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
diff --git a/tests/ui/inline-const/required-const.rs b/tests/ui/inline-const/required-const.rs
index 3de0ab2a0c0..8f640e933d0 100644
--- a/tests/ui/inline-const/required-const.rs
+++ b/tests/ui/inline-const/required-const.rs
@@ -1,6 +1,5 @@
 //@ build-fail
 //@ compile-flags: -Zmir-opt-level=3
-#![feature(inline_const)]
 
 fn foo<T>() {
     if false {
diff --git a/tests/ui/inline-const/required-const.stderr b/tests/ui/inline-const/required-const.stderr
index 2a13d18547c..6ca4c250223 100644
--- a/tests/ui/inline-const/required-const.stderr
+++ b/tests/ui/inline-const/required-const.stderr
@@ -1,13 +1,13 @@
 error[E0080]: evaluation of `foo::<i32>::{constant#0}` failed
-  --> $DIR/required-const.rs:7:17
+  --> $DIR/required-const.rs:6:17
    |
 LL |         const { panic!() }
-   |                 ^^^^^^^^ the evaluated program panicked at 'explicit panic', $DIR/required-const.rs:7:17
+   |                 ^^^^^^^^ the evaluated program panicked at 'explicit panic', $DIR/required-const.rs:6:17
    |
    = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 note: erroneous constant encountered
-  --> $DIR/required-const.rs:7:9
+  --> $DIR/required-const.rs:6:9
    |
 LL |         const { panic!() }
    |         ^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/invalid-compile-flags/print.rs b/tests/ui/invalid-compile-flags/print.rs
new file mode 100644
index 00000000000..0d0a9d22750
--- /dev/null
+++ b/tests/ui/invalid-compile-flags/print.rs
@@ -0,0 +1 @@
+//@ compile-flags: --print yyyy
diff --git a/tests/ui/invalid-compile-flags/print.stderr b/tests/ui/invalid-compile-flags/print.stderr
new file mode 100644
index 00000000000..0a032aabdfe
--- /dev/null
+++ b/tests/ui/invalid-compile-flags/print.stderr
@@ -0,0 +1,4 @@
+error: unknown print request: `yyyy`
+  |
+  = help: valid print requests are: `all-target-specs-json`, `calling-conventions`, `cfg`, `code-models`, `crate-name`, `deployment-target`, `file-names`, `link-args`, `native-static-libs`, `relocation-models`, `split-debuginfo`, `stack-protector-strategies`, `sysroot`, `target-cpus`, `target-features`, `target-libdir`, `target-list`, `target-spec-json`, `tls-models`
+
diff --git a/tests/ui/issues/issue-17385.stderr b/tests/ui/issues/issue-17385.stderr
index 988db0fb1fc..3c451a859e9 100644
--- a/tests/ui/issues/issue-17385.stderr
+++ b/tests/ui/issues/issue-17385.stderr
@@ -12,7 +12,10 @@ note: if `X` implemented `Clone`, you could clone the value
   --> $DIR/issue-17385.rs:1:1
    |
 LL | struct X(isize);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     drop(foo);
+   |          --- you could clone this value
 
 error[E0382]: use of moved value: `e`
   --> $DIR/issue-17385.rs:25:11
@@ -28,7 +31,10 @@ note: if `Enum` implemented `Clone`, you could clone the value
   --> $DIR/issue-17385.rs:3:1
    |
 LL | enum Enum {
-   | ^^^^^^^^^
+   | ^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     drop(e);
+   |          - you could clone this value
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/issues/issue-24357.rs b/tests/ui/issues/issue-24357.rs
index d1a9e37251e..63c061594d8 100644
--- a/tests/ui/issues/issue-24357.rs
+++ b/tests/ui/issues/issue-24357.rs
@@ -1,10 +1,12 @@
 struct NoCopy; //~ NOTE if `NoCopy` implemented `Clone`, you could clone the value
+//~^ NOTE consider implementing `Clone` for this type
 fn main() {
    let x = NoCopy;
    //~^ NOTE move occurs because `x` has type `NoCopy`
    let f = move || { let y = x; };
    //~^ NOTE value moved into closure here
    //~| NOTE variable moved due to use in closure
+   //~| NOTE you could clone this value
    let z = x;
    //~^ ERROR use of moved value: `x`
    //~| NOTE value used here after move
diff --git a/tests/ui/issues/issue-24357.stderr b/tests/ui/issues/issue-24357.stderr
index 6d50eea7e21..2d85077fe4c 100644
--- a/tests/ui/issues/issue-24357.stderr
+++ b/tests/ui/issues/issue-24357.stderr
@@ -1,5 +1,5 @@
 error[E0382]: use of moved value: `x`
-  --> $DIR/issue-24357.rs:8:12
+  --> $DIR/issue-24357.rs:10:12
    |
 LL |    let x = NoCopy;
    |        - move occurs because `x` has type `NoCopy`, which does not implement the `Copy` trait
@@ -16,7 +16,10 @@ note: if `NoCopy` implemented `Clone`, you could clone the value
   --> $DIR/issue-24357.rs:1:1
    |
 LL | struct NoCopy;
-   | ^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |    let f = move || { let y = x; };
+   |                              - you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/issues/issue-4335.stderr b/tests/ui/issues/issue-4335.stderr
index 8b4aff54dc3..14b5cfa9f9a 100644
--- a/tests/ui/issues/issue-4335.stderr
+++ b/tests/ui/issues/issue-4335.stderr
@@ -7,6 +7,14 @@ LL |     id(Box::new(|| *v))
    |                 -- ^^ move occurs because `*v` has type `T`, which does not implement the `Copy` trait
    |                 |
    |                 captured by this `FnMut` closure
+   |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/issue-4335.rs:5:10
+   |
+LL | fn f<'r, T>(v: &'r T) -> Box<dyn FnMut() -> T + 'r> {
+   |          ^ consider constraining this type parameter with `Clone`
+LL |     id(Box::new(|| *v))
+   |                    -- you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/lifetimes/unusual-rib-combinations.rs b/tests/ui/lifetimes/unusual-rib-combinations.rs
index a2461cff932..3bc87b9d480 100644
--- a/tests/ui/lifetimes/unusual-rib-combinations.rs
+++ b/tests/ui/lifetimes/unusual-rib-combinations.rs
@@ -1,5 +1,3 @@
-#![feature(inline_const)]
-
 struct S<'a>(&'a u8);
 fn foo() {}
 
diff --git a/tests/ui/lifetimes/unusual-rib-combinations.stderr b/tests/ui/lifetimes/unusual-rib-combinations.stderr
index 320e64a2f77..2857fc72ea1 100644
--- a/tests/ui/lifetimes/unusual-rib-combinations.stderr
+++ b/tests/ui/lifetimes/unusual-rib-combinations.stderr
@@ -1,11 +1,11 @@
 error[E0106]: missing lifetime specifier
-  --> $DIR/unusual-rib-combinations.rs:24:15
+  --> $DIR/unusual-rib-combinations.rs:22:15
    |
 LL | fn d<const C: S>() {}
    |               ^ expected named lifetime parameter
 
 error[E0770]: the type of const parameters must not depend on other generic parameters
-  --> $DIR/unusual-rib-combinations.rs:29:22
+  --> $DIR/unusual-rib-combinations.rs:27:22
    |
 LL | struct Bar<const N: &'a (dyn for<'a> Foo<'a>)>;
    |                      ^^ the type must not depend on the parameter `'a`
@@ -13,25 +13,25 @@ LL | struct Bar<const N: &'a (dyn for<'a> Foo<'a>)>;
    = note: lifetime parameters may not be used in the type of const parameters
 
 error[E0214]: parenthesized type parameters may only be used with a `Fn` trait
-  --> $DIR/unusual-rib-combinations.rs:7:16
+  --> $DIR/unusual-rib-combinations.rs:5:16
    |
 LL | fn a() -> [u8; foo::()] {
    |                ^^^^^^^ only `Fn` traits may use parentheses
 
 error[E0214]: parenthesized type parameters may only be used with a `Fn` trait
-  --> $DIR/unusual-rib-combinations.rs:14:15
+  --> $DIR/unusual-rib-combinations.rs:12:15
    |
 LL | fn b<const C: u8()>() {}
    |               ^^^^ only `Fn` traits may use parentheses
 
 error[E0214]: parenthesized type parameters may only be used with a `Fn` trait
-  --> $DIR/unusual-rib-combinations.rs:18:10
+  --> $DIR/unusual-rib-combinations.rs:16:10
    |
 LL | fn c<T = u8()>() {}
    |          ^^^^ only `Fn` traits may use parentheses
 
 error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
-  --> $DIR/unusual-rib-combinations.rs:18:6
+  --> $DIR/unusual-rib-combinations.rs:16:6
    |
 LL | fn c<T = u8()>() {}
    |      ^^^^^^^^
@@ -41,7 +41,7 @@ LL | fn c<T = u8()>() {}
    = note: `#[deny(invalid_type_param_default)]` on by default
 
 error[E0308]: mismatched types
-  --> $DIR/unusual-rib-combinations.rs:7:16
+  --> $DIR/unusual-rib-combinations.rs:5:16
    |
 LL | fn a() -> [u8; foo::()] {
    |                ^^^^^^^ expected `usize`, found fn item
@@ -50,7 +50,7 @@ LL | fn a() -> [u8; foo::()] {
            found fn item `fn() {foo}`
 
 error: `S<'_>` is forbidden as the type of a const generic parameter
-  --> $DIR/unusual-rib-combinations.rs:24:15
+  --> $DIR/unusual-rib-combinations.rs:22:15
    |
 LL | fn d<const C: S>() {}
    |               ^
diff --git a/tests/ui/lint/invalid_from_utf8.rs b/tests/ui/lint/invalid_from_utf8.rs
index e87afe9094c..2d1822a54ac 100644
--- a/tests/ui/lint/invalid_from_utf8.rs
+++ b/tests/ui/lint/invalid_from_utf8.rs
@@ -1,6 +1,5 @@
 //@ check-pass
 
-#![feature(inline_const)]
 #![feature(concat_bytes)]
 
 #![warn(invalid_from_utf8_unchecked)]
diff --git a/tests/ui/lint/invalid_from_utf8.stderr b/tests/ui/lint/invalid_from_utf8.stderr
index 884165d4f12..07616e11801 100644
--- a/tests/ui/lint/invalid_from_utf8.stderr
+++ b/tests/ui/lint/invalid_from_utf8.stderr
@@ -1,5 +1,5 @@
 warning: calls to `std::str::from_utf8_unchecked_mut` with a invalid literal are undefined behavior
-  --> $DIR/invalid_from_utf8.rs:21:9
+  --> $DIR/invalid_from_utf8.rs:20:9
    |
 LL |         std::str::from_utf8_unchecked_mut(&mut [99, 108, 130, 105, 112, 112, 121]);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^----------------------------------^
@@ -7,13 +7,13 @@ LL |         std::str::from_utf8_unchecked_mut(&mut [99, 108, 130, 105, 112, 112
    |                                                the literal was valid UTF-8 up to the 2 bytes
    |
 note: the lint level is defined here
-  --> $DIR/invalid_from_utf8.rs:6:9
+  --> $DIR/invalid_from_utf8.rs:5:9
    |
 LL | #![warn(invalid_from_utf8_unchecked)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: calls to `std::str::from_utf8_unchecked_mut` with a invalid literal are undefined behavior
-  --> $DIR/invalid_from_utf8.rs:23:9
+  --> $DIR/invalid_from_utf8.rs:22:9
    |
 LL |         std::str::from_utf8_unchecked_mut(&mut [b'c', b'l', b'\x82', b'i', b'p', b'p', b'y']);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^---------------------------------------------^
@@ -21,7 +21,7 @@ LL |         std::str::from_utf8_unchecked_mut(&mut [b'c', b'l', b'\x82', b'i',
    |                                                the literal was valid UTF-8 up to the 2 bytes
 
 warning: calls to `std::str::from_utf8_unchecked` with a invalid literal are undefined behavior
-  --> $DIR/invalid_from_utf8.rs:41:9
+  --> $DIR/invalid_from_utf8.rs:40:9
    |
 LL |         std::str::from_utf8_unchecked(&[99, 108, 130, 105, 112, 112, 121]);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^----------------------------------^
@@ -29,7 +29,7 @@ LL |         std::str::from_utf8_unchecked(&[99, 108, 130, 105, 112, 112, 121]);
    |                                        the literal was valid UTF-8 up to the 2 bytes
 
 warning: calls to `std::str::from_utf8_unchecked` with a invalid literal are undefined behavior
-  --> $DIR/invalid_from_utf8.rs:43:9
+  --> $DIR/invalid_from_utf8.rs:42:9
    |
 LL |         std::str::from_utf8_unchecked(&[b'c', b'l', b'\x82', b'i', b'p', b'p', b'y']);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^---------------------------------------------^
@@ -37,7 +37,7 @@ LL |         std::str::from_utf8_unchecked(&[b'c', b'l', b'\x82', b'i', b'p', b'
    |                                        the literal was valid UTF-8 up to the 2 bytes
 
 warning: calls to `std::str::from_utf8_unchecked` with a invalid literal are undefined behavior
-  --> $DIR/invalid_from_utf8.rs:45:9
+  --> $DIR/invalid_from_utf8.rs:44:9
    |
 LL |         std::str::from_utf8_unchecked(b"cl\x82ippy");
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-------------^
@@ -45,7 +45,7 @@ LL |         std::str::from_utf8_unchecked(b"cl\x82ippy");
    |                                       the literal was valid UTF-8 up to the 2 bytes
 
 warning: calls to `std::str::from_utf8_unchecked` with a invalid literal are undefined behavior
-  --> $DIR/invalid_from_utf8.rs:47:9
+  --> $DIR/invalid_from_utf8.rs:46:9
    |
 LL |         std::str::from_utf8_unchecked(concat_bytes!(b"cl", b"\x82ippy"));
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^---------------------------------^
@@ -53,7 +53,7 @@ LL |         std::str::from_utf8_unchecked(concat_bytes!(b"cl", b"\x82ippy"));
    |                                       the literal was valid UTF-8 up to the 2 bytes
 
 warning: calls to `std::str::from_utf8_mut` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:64:9
+  --> $DIR/invalid_from_utf8.rs:63:9
    |
 LL |         std::str::from_utf8_mut(&mut [99, 108, 130, 105, 112, 112, 121]);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^----------------------------------^
@@ -61,13 +61,13 @@ LL |         std::str::from_utf8_mut(&mut [99, 108, 130, 105, 112, 112, 121]);
    |                                      the literal was valid UTF-8 up to the 2 bytes
    |
 note: the lint level is defined here
-  --> $DIR/invalid_from_utf8.rs:7:9
+  --> $DIR/invalid_from_utf8.rs:6:9
    |
 LL | #![warn(invalid_from_utf8)]
    |         ^^^^^^^^^^^^^^^^^
 
 warning: calls to `std::str::from_utf8_mut` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:66:9
+  --> $DIR/invalid_from_utf8.rs:65:9
    |
 LL |         std::str::from_utf8_mut(&mut [b'c', b'l', b'\x82', b'i', b'p', b'p', b'y']);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^---------------------------------------------^
@@ -75,7 +75,7 @@ LL |         std::str::from_utf8_mut(&mut [b'c', b'l', b'\x82', b'i', b'p', b'p'
    |                                      the literal was valid UTF-8 up to the 2 bytes
 
 warning: calls to `std::str::from_utf8` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:84:9
+  --> $DIR/invalid_from_utf8.rs:83:9
    |
 LL |         std::str::from_utf8(&[99, 108, 130, 105, 112, 112, 121]);
    |         ^^^^^^^^^^^^^^^^^^^^^----------------------------------^
@@ -83,7 +83,7 @@ LL |         std::str::from_utf8(&[99, 108, 130, 105, 112, 112, 121]);
    |                              the literal was valid UTF-8 up to the 2 bytes
 
 warning: calls to `std::str::from_utf8` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:86:9
+  --> $DIR/invalid_from_utf8.rs:85:9
    |
 LL |         std::str::from_utf8(&[b'c', b'l', b'\x82', b'i', b'p', b'p', b'y']);
    |         ^^^^^^^^^^^^^^^^^^^^^---------------------------------------------^
@@ -91,7 +91,7 @@ LL |         std::str::from_utf8(&[b'c', b'l', b'\x82', b'i', b'p', b'p', b'y'])
    |                              the literal was valid UTF-8 up to the 2 bytes
 
 warning: calls to `std::str::from_utf8` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:88:9
+  --> $DIR/invalid_from_utf8.rs:87:9
    |
 LL |         std::str::from_utf8(b"cl\x82ippy");
    |         ^^^^^^^^^^^^^^^^^^^^-------------^
@@ -99,7 +99,7 @@ LL |         std::str::from_utf8(b"cl\x82ippy");
    |                             the literal was valid UTF-8 up to the 2 bytes
 
 warning: calls to `std::str::from_utf8` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:90:9
+  --> $DIR/invalid_from_utf8.rs:89:9
    |
 LL |         std::str::from_utf8(concat_bytes!(b"cl", b"\x82ippy"));
    |         ^^^^^^^^^^^^^^^^^^^^---------------------------------^
@@ -107,7 +107,7 @@ LL |         std::str::from_utf8(concat_bytes!(b"cl", b"\x82ippy"));
    |                             the literal was valid UTF-8 up to the 2 bytes
 
 warning: calls to `std::str::from_utf8_mut` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:97:5
+  --> $DIR/invalid_from_utf8.rs:96:5
    |
 LL |     let mut a = [99, 108, 130, 105, 112, 112, 121];
    |                 ---------------------------------- the literal was valid UTF-8 up to the 2 bytes
@@ -115,7 +115,7 @@ LL |     std::str::from_utf8_mut(&mut a);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: calls to `std::str::from_utf8_mut` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:101:5
+  --> $DIR/invalid_from_utf8.rs:100:5
    |
 LL |     let mut a = [99, 108, 130, 105, 112, 112, 121];
    |                 ---------------------------------- the literal was valid UTF-8 up to the 2 bytes
@@ -124,7 +124,7 @@ LL |     std::str::from_utf8_mut(c);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: calls to `std::str::from_utf8` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:104:5
+  --> $DIR/invalid_from_utf8.rs:103:5
    |
 LL |     let mut c = &[99, 108, 130, 105, 112, 112, 121];
    |                  ---------------------------------- the literal was valid UTF-8 up to the 2 bytes
@@ -132,7 +132,7 @@ LL |     std::str::from_utf8(c);
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: calls to `std::str::from_utf8` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:107:5
+  --> $DIR/invalid_from_utf8.rs:106:5
    |
 LL |     const INVALID_1: [u8; 7] = [99, 108, 130, 105, 112, 112, 121];
    |                                ---------------------------------- the literal was valid UTF-8 up to the 2 bytes
@@ -140,7 +140,7 @@ LL |     std::str::from_utf8(&INVALID_1);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: calls to `std::str::from_utf8` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:110:5
+  --> $DIR/invalid_from_utf8.rs:109:5
    |
 LL |     static INVALID_2: [u8; 7] = [99, 108, 130, 105, 112, 112, 121];
    |                                 ---------------------------------- the literal was valid UTF-8 up to the 2 bytes
@@ -148,7 +148,7 @@ LL |     std::str::from_utf8(&INVALID_2);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: calls to `std::str::from_utf8` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:113:5
+  --> $DIR/invalid_from_utf8.rs:112:5
    |
 LL |     const INVALID_3: &'static [u8; 7] = &[99, 108, 130, 105, 112, 112, 121];
    |                                          ---------------------------------- the literal was valid UTF-8 up to the 2 bytes
@@ -156,7 +156,7 @@ LL |     std::str::from_utf8(INVALID_3);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: calls to `std::str::from_utf8` with a invalid literal always return an error
-  --> $DIR/invalid_from_utf8.rs:116:5
+  --> $DIR/invalid_from_utf8.rs:115:5
    |
 LL |     const INVALID_4: &'static [u8; 7] = { &[99, 108, 130, 105, 112, 112, 121] };
    |                                            ---------------------------------- the literal was valid UTF-8 up to the 2 bytes
diff --git a/tests/ui/lint/must_not_suspend/tuple-mismatch.rs b/tests/ui/lint/must_not_suspend/tuple-mismatch.rs
index 2f3c5d9ea29..ec409925d72 100644
--- a/tests/ui/lint/must_not_suspend/tuple-mismatch.rs
+++ b/tests/ui/lint/must_not_suspend/tuple-mismatch.rs
@@ -1,7 +1,8 @@
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 fn main() {
-    let _coroutine = || {
+    let _coroutine = #[coroutine]
+    || {
         yield ((), ((), ()));
         yield ((), ());
         //~^ ERROR mismatched types
diff --git a/tests/ui/lint/must_not_suspend/tuple-mismatch.stderr b/tests/ui/lint/must_not_suspend/tuple-mismatch.stderr
index 3adf26cfee2..102eadd7aff 100644
--- a/tests/ui/lint/must_not_suspend/tuple-mismatch.stderr
+++ b/tests/ui/lint/must_not_suspend/tuple-mismatch.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/tuple-mismatch.rs:6:20
+  --> $DIR/tuple-mismatch.rs:7:20
    |
 LL |         yield ((), ());
    |                    ^^ expected `((), ())`, found `()`
diff --git a/tests/ui/lint/non-local-defs/consts.rs b/tests/ui/lint/non-local-defs/consts.rs
index 2652447dcf5..d8a497e43e5 100644
--- a/tests/ui/lint/non-local-defs/consts.rs
+++ b/tests/ui/lint/non-local-defs/consts.rs
@@ -2,8 +2,6 @@
 //@ edition:2021
 //@ rustc-env:CARGO_CRATE_NAME=non_local_def
 
-#![feature(inline_const)]
-
 struct Test;
 
 trait Uto {}
diff --git a/tests/ui/lint/non-local-defs/consts.stderr b/tests/ui/lint/non-local-defs/consts.stderr
index 5563ea9d93f..d15b452b004 100644
--- a/tests/ui/lint/non-local-defs/consts.stderr
+++ b/tests/ui/lint/non-local-defs/consts.stderr
@@ -1,5 +1,5 @@
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:15:5
+  --> $DIR/consts.rs:13:5
    |
 LL | const Z: () = {
    |       - help: use a const-anon item to suppress this lint: `_`
@@ -14,7 +14,7 @@ LL |     impl Uto for &Test {}
    = note: `#[warn(non_local_definitions)]` on by default
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:26:5
+  --> $DIR/consts.rs:24:5
    |
 LL |     impl Uto2 for Test {}
    |     ^^^^^^^^^^^^^^^^^^^^^
@@ -25,7 +25,7 @@ LL |     impl Uto2 for Test {}
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:34:5
+  --> $DIR/consts.rs:32:5
    |
 LL |     impl Uto3 for Test {}
    |     ^^^^^^^^^^^^^^^^^^^^^
@@ -36,7 +36,7 @@ LL |     impl Uto3 for Test {}
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:45:5
+  --> $DIR/consts.rs:43:5
    |
 LL | /     impl Test {
 LL | |
@@ -50,7 +50,7 @@ LL | |     }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:52:9
+  --> $DIR/consts.rs:50:9
    |
 LL | /         impl Test {
 LL | |
@@ -64,7 +64,7 @@ LL | |         }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:61:9
+  --> $DIR/consts.rs:59:9
    |
 LL | /         impl Test {
 LL | |
@@ -78,7 +78,7 @@ LL | |         }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:74:9
+  --> $DIR/consts.rs:72:9
    |
 LL |         impl Uto9 for Test {}
    |         ^^^^^^^^^^^^^^^^^^^^^
@@ -89,7 +89,7 @@ LL |         impl Uto9 for Test {}
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:81:9
+  --> $DIR/consts.rs:79:9
    |
 LL |         impl Uto10 for Test {}
    |         ^^^^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/lint/non-local-defs/from-local-for-global.rs b/tests/ui/lint/non-local-defs/from-local-for-global.rs
index 0ab3a6b1988..fea9679d737 100644
--- a/tests/ui/lint/non-local-defs/from-local-for-global.rs
+++ b/tests/ui/lint/non-local-defs/from-local-for-global.rs
@@ -1,8 +1,6 @@
 //@ check-pass
 //@ edition:2021
 
-#![feature(inline_const)]
-
 struct Cat;
 struct Wrap<T>(T);
 
diff --git a/tests/ui/lint/non-local-defs/from-local-for-global.stderr b/tests/ui/lint/non-local-defs/from-local-for-global.stderr
index bd592a72157..0cd385049aa 100644
--- a/tests/ui/lint/non-local-defs/from-local-for-global.stderr
+++ b/tests/ui/lint/non-local-defs/from-local-for-global.stderr
@@ -1,5 +1,5 @@
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/from-local-for-global.rs:10:5
+  --> $DIR/from-local-for-global.rs:8:5
    |
 LL | /     impl From<Cat> for () {
 LL | |
@@ -16,7 +16,7 @@ LL | |     }
    = note: `#[warn(non_local_definitions)]` on by default
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/from-local-for-global.rs:20:5
+  --> $DIR/from-local-for-global.rs:18:5
    |
 LL | /     impl From<Wrap<Wrap<Elephant>>> for () {
 LL | |
@@ -32,7 +32,7 @@ LL | |     }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/from-local-for-global.rs:34:5
+  --> $DIR/from-local-for-global.rs:32:5
    |
 LL |     impl StillNonLocal for &Foo {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -43,7 +43,7 @@ LL |     impl StillNonLocal for &Foo {}
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/from-local-for-global.rs:42:5
+  --> $DIR/from-local-for-global.rs:40:5
    |
 LL | /     impl From<Local1> for GlobalSameFunction {
 LL | |
@@ -59,7 +59,7 @@ LL | |     }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/from-local-for-global.rs:50:5
+  --> $DIR/from-local-for-global.rs:48:5
    |
 LL | /     impl From<Local2> for GlobalSameFunction {
 LL | |
diff --git a/tests/ui/lint/unused/issue-74883-unused-paren-baren-yield.rs b/tests/ui/lint/unused/issue-74883-unused-paren-baren-yield.rs
index c5dd281cb4e..12e2bcb898c 100644
--- a/tests/ui/lint/unused/issue-74883-unused-paren-baren-yield.rs
+++ b/tests/ui/lint/unused/issue-74883-unused-paren-baren-yield.rs
@@ -1,12 +1,12 @@
 #![feature(coroutine_trait)]
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![deny(unused_braces, unused_parens)]
 
 use std::ops::Coroutine;
 use std::pin::Pin;
 
 fn main() {
-    let mut x = |_| {
+    let mut x = #[coroutine] |_| {
         while let Some(_) = (yield) {}
         while let Some(_) = {yield} {}
 
diff --git a/tests/ui/lint/unused/unused-closure.rs b/tests/ui/lint/unused/unused-closure.rs
index 9106edee653..4633038cc9b 100644
--- a/tests/ui/lint/unused/unused-closure.rs
+++ b/tests/ui/lint/unused/unused-closure.rs
@@ -2,7 +2,7 @@
 //@ edition:2018
 
 #![feature(async_closure)]
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![deny(unused_must_use)]
 
 fn unused() {
@@ -26,7 +26,7 @@ fn unused() {
 
 fn ignored() {
     let _ = || {};
-    let _ = || yield 42;
+    let _ = #[coroutine] || yield 42;
 }
 
 fn main() {
diff --git a/tests/ui/liveness/liveness-upvars.rs b/tests/ui/liveness/liveness-upvars.rs
index 7898b978882..f76efba3e6b 100644
--- a/tests/ui/liveness/liveness-upvars.rs
+++ b/tests/ui/liveness/liveness-upvars.rs
@@ -1,6 +1,6 @@
 //@ edition:2018
 //@ check-pass
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![warn(unused)]
 #![allow(unreachable_code)]
 
@@ -131,7 +131,7 @@ pub fn async_coroutine() {
 
 pub fn coroutine() {
     let mut s: u32 = 0;
-    let _ = |_| {
+    let _ = #[coroutine] |_| {
         s = 0;
         yield ();
         s = 1; //~ WARN value assigned to `s` is never read
diff --git a/tests/ui/loops/dont-suggest-break-thru-item.rs b/tests/ui/loops/dont-suggest-break-thru-item.rs
index 34a9a57bfed..b4262ec02bf 100644
--- a/tests/ui/loops/dont-suggest-break-thru-item.rs
+++ b/tests/ui/loops/dont-suggest-break-thru-item.rs
@@ -1,7 +1,5 @@
 //@ edition:2021
 
-#![feature(inline_const)]
-
 fn closure() {
     loop {
         let closure = || {
diff --git a/tests/ui/loops/dont-suggest-break-thru-item.stderr b/tests/ui/loops/dont-suggest-break-thru-item.stderr
index c84a98198f5..642578ade60 100644
--- a/tests/ui/loops/dont-suggest-break-thru-item.stderr
+++ b/tests/ui/loops/dont-suggest-break-thru-item.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/dont-suggest-break-thru-item.rs:9:17
+  --> $DIR/dont-suggest-break-thru-item.rs:7:17
    |
 LL | /             if true {
 LL | |                 Err(1)
@@ -17,7 +17,7 @@ LL |                 return Err(1);
    |                 ++++++       +
 
 error[E0308]: mismatched types
-  --> $DIR/dont-suggest-break-thru-item.rs:23:17
+  --> $DIR/dont-suggest-break-thru-item.rs:21:17
    |
 LL | /             if true {
 LL | |                 Err(1)
@@ -35,7 +35,7 @@ LL |                 return Err(1);
    |                 ++++++       +
 
 error[E0308]: mismatched types
-  --> $DIR/dont-suggest-break-thru-item.rs:37:17
+  --> $DIR/dont-suggest-break-thru-item.rs:35:17
    |
 LL | /             if true {
 LL | |                 Err(1)
@@ -48,7 +48,7 @@ LL | |             }
                    found enum `Result<_, {integer}>`
 
 error[E0308]: mismatched types
-  --> $DIR/dont-suggest-break-thru-item.rs:49:17
+  --> $DIR/dont-suggest-break-thru-item.rs:47:17
    |
 LL | /             if true {
 LL | |                 Err(1)
diff --git a/tests/ui/mir/issue-102389.stderr b/tests/ui/mir/issue-102389.stderr
index 838eaffb5a0..162d7ac031a 100644
--- a/tests/ui/mir/issue-102389.stderr
+++ b/tests/ui/mir/issue-102389.stderr
@@ -8,7 +8,10 @@ note: if `Enum` implemented `Clone`, you could clone the value
   --> $DIR/issue-102389.rs:1:1
    |
 LL | enum Enum { A, B, C }
-   | ^^^^^^^^^
+   | ^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     array[*inbounds as usize]
+   |           --------- you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/moves/borrow-closures-instead-of-move.rs b/tests/ui/moves/borrow-closures-instead-of-move.rs
index 51771ced7f2..e4bca54e995 100644
--- a/tests/ui/moves/borrow-closures-instead-of-move.rs
+++ b/tests/ui/moves/borrow-closures-instead-of-move.rs
@@ -1,4 +1,4 @@
-fn takes_fn(f: impl Fn()) {
+fn takes_fn(f: impl Fn()) { //~ HELP if `impl Fn()` implemented `Clone`
     loop {
         takes_fnonce(f);
         //~^ ERROR use of moved value
@@ -6,7 +6,7 @@ fn takes_fn(f: impl Fn()) {
     }
 }
 
-fn takes_fn_mut(m: impl FnMut()) {
+fn takes_fn_mut(m: impl FnMut()) { //~ HELP if `impl FnMut()` implemented `Clone`
     if maybe() {
         takes_fnonce(m);
         //~^ HELP consider mutably borrowing
diff --git a/tests/ui/moves/borrow-closures-instead-of-move.stderr b/tests/ui/moves/borrow-closures-instead-of-move.stderr
index 9a84ddef7e6..ab6ff417efb 100644
--- a/tests/ui/moves/borrow-closures-instead-of-move.stderr
+++ b/tests/ui/moves/borrow-closures-instead-of-move.stderr
@@ -15,6 +15,14 @@ LL | fn takes_fnonce(_: impl FnOnce()) {}
    |    ------------    ^^^^^^^^^^^^^ this parameter takes ownership of the value
    |    |
    |    in this function
+help: if `impl Fn()` implemented `Clone`, you could clone the value
+  --> $DIR/borrow-closures-instead-of-move.rs:1:16
+   |
+LL | fn takes_fn(f: impl Fn()) {
+   |                ^^^^^^^^^ consider constraining this type parameter with `Clone`
+LL |     loop {
+LL |         takes_fnonce(f);
+   |                      - you could clone this value
 help: consider borrowing `f`
    |
 LL |         takes_fnonce(&f);
@@ -39,6 +47,14 @@ LL | fn takes_fnonce(_: impl FnOnce()) {}
    |    ------------    ^^^^^^^^^^^^^ this parameter takes ownership of the value
    |    |
    |    in this function
+help: if `impl FnMut()` implemented `Clone`, you could clone the value
+  --> $DIR/borrow-closures-instead-of-move.rs:9:20
+   |
+LL | fn takes_fn_mut(m: impl FnMut()) {
+   |                    ^^^^^^^^^^^^ consider constraining this type parameter with `Clone`
+LL |     if maybe() {
+LL |         takes_fnonce(m);
+   |                      - you could clone this value
 help: consider mutably borrowing `m`
    |
 LL |         takes_fnonce(&mut m);
diff --git a/tests/ui/moves/issue-72649-uninit-in-loop.rs b/tests/ui/moves/issue-72649-uninit-in-loop.rs
index 86f389cb3af..8f2e01bdf1a 100644
--- a/tests/ui/moves/issue-72649-uninit-in-loop.rs
+++ b/tests/ui/moves/issue-72649-uninit-in-loop.rs
@@ -7,6 +7,10 @@ struct NonCopy;
 //~| NOTE if `NonCopy` implemented `Clone`
 //~| NOTE if `NonCopy` implemented `Clone`
 //~| NOTE if `NonCopy` implemented `Clone`
+//~| NOTE consider implementing `Clone` for this type
+//~| NOTE consider implementing `Clone` for this type
+//~| NOTE consider implementing `Clone` for this type
+//~| NOTE consider implementing `Clone` for this type
 
 fn good() {
     loop {
@@ -21,6 +25,7 @@ fn moved_here_1() {
         //~^ NOTE move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait
         let _used = value;
         //~^ NOTE value moved here
+        //~| NOTE you could clone this value
         let _used2 = value; //~ ERROR use of moved value: `value`
         //~^ NOTE value used here after move
     }
@@ -32,6 +37,7 @@ fn moved_here_2() {
     loop { //~ NOTE inside of this loop
         let _used = value;
         //~^ NOTE value moved here
+        //~| NOTE you could clone this value
         loop {
             let _used2 = value; //~ ERROR use of moved value: `value`
             //~^ NOTE value used here after move
@@ -45,6 +51,7 @@ fn moved_loop_1() {
     loop { //~ NOTE inside of this loop
         let _used = value; //~ ERROR use of moved value: `value`
         //~^ NOTE value moved here, in previous iteration of loop
+        //~| NOTE you could clone this value
     }
 }
 
@@ -56,6 +63,7 @@ fn moved_loop_2() {
     loop { //~ NOTE inside of this loop
         let _used2 = value; //~ ERROR use of moved value: `value`
         //~^ NOTE value moved here, in previous iteration of loop
+        //~| NOTE you could clone this value
     }
 }
 
diff --git a/tests/ui/moves/issue-72649-uninit-in-loop.stderr b/tests/ui/moves/issue-72649-uninit-in-loop.stderr
index a613f35a35e..3a93769ac45 100644
--- a/tests/ui/moves/issue-72649-uninit-in-loop.stderr
+++ b/tests/ui/moves/issue-72649-uninit-in-loop.stderr
@@ -1,12 +1,12 @@
 error[E0382]: use of moved value: `value`
-  --> $DIR/issue-72649-uninit-in-loop.rs:24:22
+  --> $DIR/issue-72649-uninit-in-loop.rs:29:22
    |
 LL |         let value = NonCopy{};
    |             ----- move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait
 LL |
 LL |         let _used = value;
    |                     ----- value moved here
-LL |
+...
 LL |         let _used2 = value;
    |                      ^^^^^ value used here after move
    |
@@ -14,10 +14,13 @@ note: if `NonCopy` implemented `Clone`, you could clone the value
   --> $DIR/issue-72649-uninit-in-loop.rs:5:1
    |
 LL | struct NonCopy;
-   | ^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         let _used = value;
+   |                     ----- you could clone this value
 
 error[E0382]: use of moved value: `value`
-  --> $DIR/issue-72649-uninit-in-loop.rs:36:26
+  --> $DIR/issue-72649-uninit-in-loop.rs:42:26
    |
 LL |     let value = NonCopy{};
    |         ----- move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait
@@ -34,10 +37,13 @@ note: if `NonCopy` implemented `Clone`, you could clone the value
   --> $DIR/issue-72649-uninit-in-loop.rs:5:1
    |
 LL | struct NonCopy;
-   | ^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         let _used = value;
+   |                     ----- you could clone this value
 
 error[E0382]: use of moved value: `value`
-  --> $DIR/issue-72649-uninit-in-loop.rs:46:21
+  --> $DIR/issue-72649-uninit-in-loop.rs:52:21
    |
 LL |     let value = NonCopy{};
    |         ----- move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait
@@ -51,10 +57,13 @@ note: if `NonCopy` implemented `Clone`, you could clone the value
   --> $DIR/issue-72649-uninit-in-loop.rs:5:1
    |
 LL | struct NonCopy;
-   | ^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         let _used = value;
+   |                     ----- you could clone this value
 
 error[E0382]: use of moved value: `value`
-  --> $DIR/issue-72649-uninit-in-loop.rs:57:22
+  --> $DIR/issue-72649-uninit-in-loop.rs:64:22
    |
 LL |     let mut value = NonCopy{};
    |         --------- move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait
@@ -68,10 +77,13 @@ note: if `NonCopy` implemented `Clone`, you could clone the value
   --> $DIR/issue-72649-uninit-in-loop.rs:5:1
    |
 LL | struct NonCopy;
-   | ^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         let _used2 = value;
+   |                      ----- you could clone this value
 
 error[E0381]: used binding `value` isn't initialized
-  --> $DIR/issue-72649-uninit-in-loop.rs:65:21
+  --> $DIR/issue-72649-uninit-in-loop.rs:73:21
    |
 LL |         let value: NonCopy;
    |             ----- binding declared here but left uninitialized
@@ -84,7 +96,7 @@ LL |         let value: NonCopy = /* value */;
    |                            +++++++++++++
 
 error[E0381]: used binding `value` isn't initialized
-  --> $DIR/issue-72649-uninit-in-loop.rs:73:21
+  --> $DIR/issue-72649-uninit-in-loop.rs:81:21
    |
 LL |     let mut value: NonCopy;
    |         --------- binding declared here but left uninitialized
diff --git a/tests/ui/moves/issue-75904-move-closure-loop.stderr b/tests/ui/moves/issue-75904-move-closure-loop.stderr
index b6ad906bbdb..815e91b0f4d 100644
--- a/tests/ui/moves/issue-75904-move-closure-loop.stderr
+++ b/tests/ui/moves/issue-75904-move-closure-loop.stderr
@@ -15,7 +15,10 @@ note: if `NotCopy` implemented `Clone`, you could clone the value
   --> $DIR/issue-75904-move-closure-loop.rs:5:1
    |
 LL | struct NotCopy;
-   | ^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |             a;
+   |             - you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/moves/move-fn-self-receiver.stderr b/tests/ui/moves/move-fn-self-receiver.stderr
index e6bf52276ac..f2c6008d27e 100644
--- a/tests/ui/moves/move-fn-self-receiver.stderr
+++ b/tests/ui/moves/move-fn-self-receiver.stderr
@@ -106,7 +106,10 @@ note: if `Foo` implemented `Clone`, you could clone the value
   --> $DIR/move-fn-self-receiver.rs:5:1
    |
 LL | struct Foo;
-   | ^^^^^^^^^^
+   | ^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let ret = mut_foo.use_mut_self();
+   |               ------- you could clone this value
 
 error[E0382]: use of moved value: `rc_foo`
   --> $DIR/move-fn-self-receiver.rs:55:5
@@ -142,7 +145,10 @@ note: if `Foo` implemented `Clone`, you could clone the value
   --> $DIR/move-fn-self-receiver.rs:5:1
    |
 LL | struct Foo;
-   | ^^^^^^^^^^
+   | ^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     foo_add + Foo;
+   |     ------- you could clone this value
 note: calling this operator moves the left-hand side
   --> $SRC_DIR/core/src/ops/arith.rs:LL:COL
 
diff --git a/tests/ui/moves/move-out-of-array-1.stderr b/tests/ui/moves/move-out-of-array-1.stderr
index 9e4a08e0cef..8a030f02192 100644
--- a/tests/ui/moves/move-out-of-array-1.stderr
+++ b/tests/ui/moves/move-out-of-array-1.stderr
@@ -11,7 +11,10 @@ note: if `D` implemented `Clone`, you could clone the value
   --> $DIR/move-out-of-array-1.rs:5:1
    |
 LL | struct D { _x: u8 }
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     a[i]
+   |     ---- you could clone this value
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/moves/moves-based-on-type-no-recursive-stack-closure.stderr b/tests/ui/moves/moves-based-on-type-no-recursive-stack-closure.stderr
index 4759b45892c..a8473bb8198 100644
--- a/tests/ui/moves/moves-based-on-type-no-recursive-stack-closure.stderr
+++ b/tests/ui/moves/moves-based-on-type-no-recursive-stack-closure.stderr
@@ -17,6 +17,13 @@ LL |     let mut r = R {c: Box::new(f)};
 LL |     f(&mut r, false)
    |     ^ value borrowed here after move
    |
+help: if `F` implemented `Clone`, you could clone the value
+  --> $DIR/moves-based-on-type-no-recursive-stack-closure.rs:30:16
+   |
+LL | fn conspirator<F>(mut f: F) where F: FnMut(&mut R, bool) {
+   |                ^ consider constraining this type parameter with `Clone`
+LL |     let mut r = R {c: Box::new(f)};
+   |                                - you could clone this value
 help: consider mutably borrowing `f`
    |
 LL |     let mut r = R {c: Box::new(&mut f)};
diff --git a/tests/ui/moves/use_of_moved_value_copy_suggestions.fixed b/tests/ui/moves/use_of_moved_value_copy_suggestions.fixed
index e726c8145c3..bfb855c7fb1 100644
--- a/tests/ui/moves/use_of_moved_value_copy_suggestions.fixed
+++ b/tests/ui/moves/use_of_moved_value_copy_suggestions.fixed
@@ -3,6 +3,7 @@
 
 fn duplicate_t<T: Copy>(t: T) -> (T, T) {
     //~^ HELP consider restricting type parameter `T`
+    //~| HELP if `T` implemented `Clone`, you could clone the value
     (t, t) //~ use of moved value: `t`
 }
 
@@ -72,10 +73,11 @@ where
 #[rustfmt::skip]
 fn existing_colon<T: Copy>(t: T) {
     //~^ HELP consider restricting type parameter `T`
+    //~| HELP if `T` implemented `Clone`, you could clone the value
     [t, t]; //~ use of moved value: `t`
 }
 
-fn existing_colon_in_where<T>(t: T)
+fn existing_colon_in_where<T>(t: T) //~ HELP if `T` implemented `Clone`, you could clone the value
 where
     T:, T: Copy
     //~^ HELP consider further restricting type parameter `T`
diff --git a/tests/ui/moves/use_of_moved_value_copy_suggestions.rs b/tests/ui/moves/use_of_moved_value_copy_suggestions.rs
index ee08ce0fa5b..fbe5a1d74c3 100644
--- a/tests/ui/moves/use_of_moved_value_copy_suggestions.rs
+++ b/tests/ui/moves/use_of_moved_value_copy_suggestions.rs
@@ -3,6 +3,7 @@
 
 fn duplicate_t<T>(t: T) -> (T, T) {
     //~^ HELP consider restricting type parameter `T`
+    //~| HELP if `T` implemented `Clone`, you could clone the value
     (t, t) //~ use of moved value: `t`
 }
 
@@ -72,10 +73,11 @@ where
 #[rustfmt::skip]
 fn existing_colon<T:>(t: T) {
     //~^ HELP consider restricting type parameter `T`
+    //~| HELP if `T` implemented `Clone`, you could clone the value
     [t, t]; //~ use of moved value: `t`
 }
 
-fn existing_colon_in_where<T>(t: T)
+fn existing_colon_in_where<T>(t: T) //~ HELP if `T` implemented `Clone`, you could clone the value
 where
     T:,
     //~^ HELP consider further restricting type parameter `T`
diff --git a/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr b/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr
index 3e37fcb2141..c03204c7b9f 100644
--- a/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr
+++ b/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr
@@ -1,21 +1,29 @@
 error[E0382]: use of moved value: `t`
-  --> $DIR/use_of_moved_value_copy_suggestions.rs:6:9
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:7:9
    |
 LL | fn duplicate_t<T>(t: T) -> (T, T) {
    |                   - move occurs because `t` has type `T`, which does not implement the `Copy` trait
-LL |
+...
 LL |     (t, t)
    |      -  ^ value used here after move
    |      |
    |      value moved here
    |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:4:16
+   |
+LL | fn duplicate_t<T>(t: T) -> (T, T) {
+   |                ^ consider constraining this type parameter with `Clone`
+...
+LL |     (t, t)
+   |      - you could clone this value
 help: consider restricting type parameter `T`
    |
 LL | fn duplicate_t<T: Copy>(t: T) -> (T, T) {
    |                 ++++++
 
 error[E0382]: use of moved value: `t`
-  --> $DIR/use_of_moved_value_copy_suggestions.rs:11:9
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:12:9
    |
 LL | fn duplicate_opt<T>(t: Option<T>) -> (Option<T>, Option<T>) {
    |                     - move occurs because `t` has type `Option<T>`, which does not implement the `Copy` trait
@@ -31,7 +39,7 @@ LL | fn duplicate_opt<T: Copy>(t: Option<T>) -> (Option<T>, Option<T>) {
    |                   ++++++
 
 error[E0382]: use of moved value: `t`
-  --> $DIR/use_of_moved_value_copy_suggestions.rs:16:9
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:17:9
    |
 LL | fn duplicate_tup1<T>(t: (T,)) -> ((T,), (T,)) {
    |                      - move occurs because `t` has type `(T,)`, which does not implement the `Copy` trait
@@ -47,7 +55,7 @@ LL | fn duplicate_tup1<T: Copy>(t: (T,)) -> ((T,), (T,)) {
    |                    ++++++
 
 error[E0382]: use of moved value: `t`
-  --> $DIR/use_of_moved_value_copy_suggestions.rs:21:9
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:22:9
    |
 LL | fn duplicate_tup2<A, B>(t: (A, B)) -> ((A, B), (A, B)) {
    |                         - move occurs because `t` has type `(A, B)`, which does not implement the `Copy` trait
@@ -63,7 +71,7 @@ LL | fn duplicate_tup2<A: Copy, B: Copy>(t: (A, B)) -> ((A, B), (A, B)) {
    |                    ++++++   ++++++
 
 error[E0382]: use of moved value: `t`
-  --> $DIR/use_of_moved_value_copy_suggestions.rs:26:9
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:27:9
    |
 LL | fn duplicate_custom<T>(t: S<T>) -> (S<T>, S<T>) {
    |                        - move occurs because `t` has type `S<T>`, which does not implement the `Copy` trait
@@ -79,7 +87,7 @@ LL | fn duplicate_custom<T: Copy + Trait>(t: S<T>) -> (S<T>, S<T>) {
    |                      ++++++++++++++
 
 error[E0382]: use of moved value: `t`
-  --> $DIR/use_of_moved_value_copy_suggestions.rs:44:9
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:45:9
    |
 LL | fn duplicate_custom_1<T>(t: S<T>) -> (S<T>, S<T>) where {
    |                          - move occurs because `t` has type `S<T>`, which does not implement the `Copy` trait
@@ -95,7 +103,7 @@ LL | fn duplicate_custom_1<T: Copy + Trait>(t: S<T>) -> (S<T>, S<T>) where {
    |                        ++++++++++++++
 
 error[E0382]: use of moved value: `t`
-  --> $DIR/use_of_moved_value_copy_suggestions.rs:52:9
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:53:9
    |
 LL | fn duplicate_custom_2<T>(t: S<T>) -> (S<T>, S<T>)
    |                          - move occurs because `t` has type `S<T>`, which does not implement the `Copy` trait
@@ -111,7 +119,7 @@ LL |     T: A + Copy + Trait,
    |          ++++++++++++++
 
 error[E0382]: use of moved value: `t`
-  --> $DIR/use_of_moved_value_copy_suggestions.rs:61:9
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:62:9
    |
 LL | fn duplicate_custom_3<T>(t: S<T>) -> (S<T>, S<T>)
    |                          - move occurs because `t` has type `S<T>`, which does not implement the `Copy` trait
@@ -127,7 +135,7 @@ LL |     T: A + Copy + Trait,
    |          ++++++++++++++
 
 error[E0382]: use of moved value: `t`
-  --> $DIR/use_of_moved_value_copy_suggestions.rs:69:9
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:70:9
    |
 LL | fn duplicate_custom_4<T: A>(t: S<T>) -> (S<T>, S<T>)
    |                             - move occurs because `t` has type `S<T>`, which does not implement the `Copy` trait
@@ -143,23 +151,31 @@ LL | fn duplicate_custom_4<T: A + Copy + Trait>(t: S<T>) -> (S<T>, S<T>)
    |                            ++++++++++++++
 
 error[E0382]: use of moved value: `t`
-  --> $DIR/use_of_moved_value_copy_suggestions.rs:75:9
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:77:9
    |
 LL | fn existing_colon<T:>(t: T) {
    |                       - move occurs because `t` has type `T`, which does not implement the `Copy` trait
-LL |
+...
 LL |     [t, t];
    |      -  ^ value used here after move
    |      |
    |      value moved here
    |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:74:19
+   |
+LL | fn existing_colon<T:>(t: T) {
+   |                   ^ consider constraining this type parameter with `Clone`
+...
+LL |     [t, t];
+   |      - you could clone this value
 help: consider restricting type parameter `T`
    |
 LL | fn existing_colon<T: Copy>(t: T) {
    |                      ++++
 
 error[E0382]: use of moved value: `t`
-  --> $DIR/use_of_moved_value_copy_suggestions.rs:83:9
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:85:9
    |
 LL | fn existing_colon_in_where<T>(t: T)
    |                               - move occurs because `t` has type `T`, which does not implement the `Copy` trait
@@ -169,6 +185,14 @@ LL |     [t, t];
    |      |
    |      value moved here
    |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/use_of_moved_value_copy_suggestions.rs:80:28
+   |
+LL | fn existing_colon_in_where<T>(t: T)
+   |                            ^ consider constraining this type parameter with `Clone`
+...
+LL |     [t, t];
+   |      - you could clone this value
 help: consider further restricting type parameter `T`
    |
 LL |     T:, T: Copy
diff --git a/tests/ui/nll/closure-borrow-spans.stderr b/tests/ui/nll/closure-borrow-spans.stderr
index cac22c2ecda..c466cad25d2 100644
--- a/tests/ui/nll/closure-borrow-spans.stderr
+++ b/tests/ui/nll/closure-borrow-spans.stderr
@@ -25,6 +25,8 @@ LL |     f.use_ref();
 error[E0597]: `x` does not live long enough
   --> $DIR/closure-borrow-spans.rs:19:16
    |
+LL |         let x = 1;
+   |             - binding `x` declared here
 LL |         f = || x;
    |             -- ^ borrowed value does not live long enough
    |             |
@@ -85,6 +87,8 @@ LL |     f.use_ref();
 error[E0597]: `x` does not live long enough
   --> $DIR/closure-borrow-spans.rs:52:16
    |
+LL |         let mut x = 1;
+   |             ----- binding `x` declared here
 LL |         f = || x = 0;
    |             -- ^ borrowed value does not live long enough
    |             |
@@ -145,6 +149,8 @@ LL |     f.use_ref();
 error[E0597]: `x` does not live long enough
   --> $DIR/closure-borrow-spans.rs:86:16
    |
+LL |         let x = &mut z;
+   |             - binding `x` declared here
 LL |         f = || *x = 0;
    |             -- ^^ borrowed value does not live long enough
    |             |
diff --git a/tests/ui/nll/closure-requirements/escape-upvar-nested.stderr b/tests/ui/nll/closure-requirements/escape-upvar-nested.stderr
index aa73e91cc77..8e47ab780f2 100644
--- a/tests/ui/nll/closure-requirements/escape-upvar-nested.stderr
+++ b/tests/ui/nll/closure-requirements/escape-upvar-nested.stderr
@@ -37,6 +37,9 @@ LL | fn test() {
 error[E0597]: `y` does not live long enough
   --> $DIR/escape-upvar-nested.rs:21:40
    |
+LL |         let y = 22;
+   |             - binding `y` declared here
+LL |
 LL |         let mut closure = || {
    |                           -- value captured here
 LL |             let mut closure1 = || p = &y;
diff --git a/tests/ui/nll/closure-requirements/escape-upvar-ref.stderr b/tests/ui/nll/closure-requirements/escape-upvar-ref.stderr
index 949dcc78703..c428150aa2f 100644
--- a/tests/ui/nll/closure-requirements/escape-upvar-ref.stderr
+++ b/tests/ui/nll/closure-requirements/escape-upvar-ref.stderr
@@ -23,6 +23,8 @@ LL | fn test() {
 error[E0597]: `y` does not live long enough
   --> $DIR/escape-upvar-ref.rs:23:35
    |
+LL |         let y = 22;
+   |             - binding `y` declared here
 LL |         let mut closure = || p = &y;
    |                           --      ^ borrowed value does not live long enough
    |                           |
diff --git a/tests/ui/nll/closure-requirements/propagate-multiple-requirements.stderr b/tests/ui/nll/closure-requirements/propagate-multiple-requirements.stderr
index 81b5f09b041..15f48d88c37 100644
--- a/tests/ui/nll/closure-requirements/propagate-multiple-requirements.stderr
+++ b/tests/ui/nll/closure-requirements/propagate-multiple-requirements.stderr
@@ -1,6 +1,8 @@
 error[E0597]: `local_arr` does not live long enough
   --> $DIR/propagate-multiple-requirements.rs:15:14
    |
+LL |     let local_arr = other_local_arr;
+   |         --------- binding `local_arr` declared here
 LL |     let mut out: &mut &'static [i32] = &mut (&[1] as _);
    |                  ------------------- type annotation requires that `local_arr` is borrowed for `'static`
 LL |     once(|mut z: &[i32], mut out_val: &mut &[i32]| {
diff --git a/tests/ui/nll/coroutine-distinct-lifetime.rs b/tests/ui/nll/coroutine-distinct-lifetime.rs
index ff94a3d54b7..471fad686c4 100644
--- a/tests/ui/nll/coroutine-distinct-lifetime.rs
+++ b/tests/ui/nll/coroutine-distinct-lifetime.rs
@@ -9,6 +9,7 @@
 //@ check-pass
 
 fn foo(x: &mut u32) {
+    #[coroutine]
     move || {
         let s = &mut *x;
         yield;
diff --git a/tests/ui/nll/coroutine-upvar-mutability.rs b/tests/ui/nll/coroutine-upvar-mutability.rs
index 12853b16b9b..a7d14173fb9 100644
--- a/tests/ui/nll/coroutine-upvar-mutability.rs
+++ b/tests/ui/nll/coroutine-upvar-mutability.rs
@@ -4,6 +4,8 @@
 
 fn mutate_upvar() {
     let x = 0;
+
+    #[coroutine]
     move || {
         x = 1;
         //~^ ERROR
diff --git a/tests/ui/nll/coroutine-upvar-mutability.stderr b/tests/ui/nll/coroutine-upvar-mutability.stderr
index 8922eae3151..8b9be877c8f 100644
--- a/tests/ui/nll/coroutine-upvar-mutability.stderr
+++ b/tests/ui/nll/coroutine-upvar-mutability.stderr
@@ -1,9 +1,9 @@
 error[E0594]: cannot assign to `x`, as it is not declared as mutable
-  --> $DIR/coroutine-upvar-mutability.rs:8:9
+  --> $DIR/coroutine-upvar-mutability.rs:10:9
    |
 LL |     let x = 0;
    |         - help: consider changing this to be mutable: `mut x`
-LL |     move || {
+...
 LL |         x = 1;
    |         ^^^^^ cannot assign
 
diff --git a/tests/ui/nll/extra-unused-mut.rs b/tests/ui/nll/extra-unused-mut.rs
index 786ba98508f..b040dcc6e5d 100644
--- a/tests/ui/nll/extra-unused-mut.rs
+++ b/tests/ui/nll/extra-unused-mut.rs
@@ -18,6 +18,8 @@ fn mutable_upvar() {
 // #50897
 fn coroutine_mutable_upvar() {
     let mut x = 0;
+
+    #[coroutine]
     move || {
         x = 1;
         yield;
@@ -36,13 +38,13 @@ struct Expr {
 // #51904
 fn parse_dot_or_call_expr_with(mut attrs: Vec<u32>) {
     let x = Expr { attrs: vec![] };
-    Some(Some(x)).map(|expr|
+    Some(Some(x)).map(|expr| {
         expr.map(|mut expr| {
             attrs.push(666);
             expr.attrs = attrs;
             expr
         })
-    );
+    });
 }
 
 // Found when trying to bootstrap rustc
diff --git a/tests/ui/nll/issue-21232-partial-init-and-use.stderr b/tests/ui/nll/issue-21232-partial-init-and-use.stderr
index 2aff375f0a7..496a298a36c 100644
--- a/tests/ui/nll/issue-21232-partial-init-and-use.stderr
+++ b/tests/ui/nll/issue-21232-partial-init-and-use.stderr
@@ -32,7 +32,10 @@ note: if `S<Box<u32>>` implemented `Clone`, you could clone the value
   --> $DIR/issue-21232-partial-init-and-use.rs:15:1
    |
 LL | struct S<Y> {
-   | ^^^^^^^^^^^
+   | ^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let mut s: S<B> = S::new(); drop(s);
+   |                                      - you could clone this value
 
 error[E0382]: assign to part of moved value: `t`
   --> $DIR/issue-21232-partial-init-and-use.rs:116:5
@@ -83,7 +86,10 @@ note: if `S<Box<u32>>` implemented `Clone`, you could clone the value
   --> $DIR/issue-21232-partial-init-and-use.rs:15:1
    |
 LL | struct S<Y> {
-   | ^^^^^^^^^^^
+   | ^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let mut s: S<B> = S::new(); drop(s);
+   |                                      - you could clone this value
 
 error[E0382]: assign to part of moved value: `t`
   --> $DIR/issue-21232-partial-init-and-use.rs:142:5
diff --git a/tests/ui/nll/issue-27282-move-ref-mut-into-guard.fixed b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.fixed
new file mode 100644
index 00000000000..7692be7ccc8
--- /dev/null
+++ b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.fixed
@@ -0,0 +1,23 @@
+// Issue 27282: Example 1: This sidesteps the AST checks disallowing
+// mutable borrows in match guards by hiding the mutable borrow in a
+// guard behind a move (of the ref mut pattern id) within a closure.
+//@ run-rustfix
+#![feature(if_let_guard)]
+
+fn main() {
+    match Some(&4) {
+        None => {},
+        ref mut foo
+            if { (|| { let mut bar = foo.clone(); bar.take() })(); false } => {},
+        //~^ ERROR cannot move out of `foo` in pattern guard [E0507]
+        Some(s) => std::process::exit(*s),
+    }
+
+    match Some(&4) {
+        None => {},
+        ref mut foo
+            if let Some(()) = { (|| { let mut bar = foo.clone(); bar.take() })(); None } => {},
+        //~^ ERROR cannot move out of `foo` in pattern guard [E0507]
+        Some(s) => std::process::exit(*s),
+    }
+}
diff --git a/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs
index 833ca8afd61..f3d0a184e03 100644
--- a/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs
+++ b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs
@@ -1,14 +1,14 @@
 // Issue 27282: Example 1: This sidesteps the AST checks disallowing
 // mutable borrows in match guards by hiding the mutable borrow in a
 // guard behind a move (of the ref mut pattern id) within a closure.
-
+//@ run-rustfix
 #![feature(if_let_guard)]
 
 fn main() {
     match Some(&4) {
         None => {},
         ref mut foo
-            if { (|| { let bar = foo; bar.take() })(); false } => {},
+            if { (|| { let mut bar = foo; bar.take() })(); false } => {},
         //~^ ERROR cannot move out of `foo` in pattern guard [E0507]
         Some(s) => std::process::exit(*s),
     }
@@ -16,7 +16,7 @@ fn main() {
     match Some(&4) {
         None => {},
         ref mut foo
-            if let Some(()) = { (|| { let bar = foo; bar.take() })(); None } => {},
+            if let Some(()) = { (|| { let mut bar = foo; bar.take() })(); None } => {},
         //~^ ERROR cannot move out of `foo` in pattern guard [E0507]
         Some(s) => std::process::exit(*s),
     }
diff --git a/tests/ui/nll/issue-27282-move-ref-mut-into-guard.stderr b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.stderr
index 4a512560c87..7781e77894b 100644
--- a/tests/ui/nll/issue-27282-move-ref-mut-into-guard.stderr
+++ b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.stderr
@@ -1,22 +1,30 @@
 error[E0507]: cannot move out of `foo` in pattern guard
   --> $DIR/issue-27282-move-ref-mut-into-guard.rs:11:19
    |
-LL |             if { (|| { let bar = foo; bar.take() })(); false } => {},
-   |                   ^^             --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait
+LL |             if { (|| { let mut bar = foo; bar.take() })(); false } => {},
+   |                   ^^                 --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait
    |                   |
    |                   `foo` is moved here
    |
    = note: variables bound in patterns cannot be moved from until after the end of the pattern guard
+help: consider cloning the value if the performance cost is acceptable
+   |
+LL |             if { (|| { let mut bar = foo.clone(); bar.take() })(); false } => {},
+   |                                         ++++++++
 
 error[E0507]: cannot move out of `foo` in pattern guard
   --> $DIR/issue-27282-move-ref-mut-into-guard.rs:19:34
    |
-LL |             if let Some(()) = { (|| { let bar = foo; bar.take() })(); None } => {},
-   |                                  ^^             --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait
+LL |             if let Some(()) = { (|| { let mut bar = foo; bar.take() })(); None } => {},
+   |                                  ^^                 --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait
    |                                  |
    |                                  `foo` is moved here
    |
    = note: variables bound in patterns cannot be moved from until after the end of the pattern guard
+help: consider cloning the value if the performance cost is acceptable
+   |
+LL |             if let Some(()) = { (|| { let mut bar = foo.clone(); bar.take() })(); None } => {},
+   |                                                        ++++++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/nll/issue-27282-mutation-in-guard.stderr b/tests/ui/nll/issue-27282-mutation-in-guard.stderr
index 0b5d723172c..f73e4aaa489 100644
--- a/tests/ui/nll/issue-27282-mutation-in-guard.stderr
+++ b/tests/ui/nll/issue-27282-mutation-in-guard.stderr
@@ -7,6 +7,10 @@ LL |                 (|| { let bar = foo; bar.take() })();
    |                  `foo` is moved here
    |
    = note: variables bound in patterns cannot be moved from until after the end of the pattern guard
+help: consider cloning the value if the performance cost is acceptable
+   |
+LL |                 (|| { let bar = foo.clone(); bar.take() })();
+   |                                    ++++++++
 
 error[E0507]: cannot move out of `foo` in pattern guard
   --> $DIR/issue-27282-mutation-in-guard.rs:20:18
@@ -17,6 +21,10 @@ LL |                 (|| { let bar = foo; bar.take() })();
    |                  `foo` is moved here
    |
    = note: variables bound in patterns cannot be moved from until after the end of the pattern guard
+help: consider cloning the value if the performance cost is acceptable
+   |
+LL |                 (|| { let bar = foo.clone(); bar.take() })();
+   |                                    ++++++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr b/tests/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr
index f7a525ee9b0..e3f44467550 100644
--- a/tests/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr
+++ b/tests/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr
@@ -11,6 +11,8 @@ LL |     || doit(data);
 error[E0597]: `data` does not live long enough
   --> $DIR/issue-42574-diagnostic-in-nested-closure.rs:6:13
    |
+LL | fn doit(data: &'static mut ()) {
+   |         ---- binding `data` declared here
 LL |     || doit(data);
    |     -- -----^^^^-
    |     |  |    |
diff --git a/tests/ui/nll/issue-48623-coroutine.rs b/tests/ui/nll/issue-48623-coroutine.rs
index 3a4a27855d9..63348a2047c 100644
--- a/tests/ui/nll/issue-48623-coroutine.rs
+++ b/tests/ui/nll/issue-48623-coroutine.rs
@@ -12,7 +12,7 @@ impl Drop for WithDrop {
 
 fn reborrow_from_coroutine(r: &mut ()) {
     let d = WithDrop;
-    move || { d; yield; &mut *r }; //~ WARN unused coroutine that must be used
+    #[coroutine] move || { d; yield; &mut *r }; //~ WARN unused coroutine that must be used
 }
 
 fn main() {}
diff --git a/tests/ui/nll/issue-48623-coroutine.stderr b/tests/ui/nll/issue-48623-coroutine.stderr
index 1b7b1735aac..4e4cd28ef2a 100644
--- a/tests/ui/nll/issue-48623-coroutine.stderr
+++ b/tests/ui/nll/issue-48623-coroutine.stderr
@@ -1,8 +1,8 @@
 warning: unused coroutine that must be used
-  --> $DIR/issue-48623-coroutine.rs:15:5
+  --> $DIR/issue-48623-coroutine.rs:15:18
    |
-LL |     move || { d; yield; &mut *r };
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL |     #[coroutine] move || { d; yield; &mut *r };
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: coroutines are lazy and do nothing unless resumed
    = note: `#[warn(unused_must_use)]` on by default
diff --git a/tests/ui/nll/issue-55850.rs b/tests/ui/nll/issue-55850.rs
index fc873af9463..bf1e2e7caef 100644
--- a/tests/ui/nll/issue-55850.rs
+++ b/tests/ui/nll/issue-55850.rs
@@ -23,7 +23,7 @@ where
 }
 
 fn bug<'a>() -> impl Iterator<Item = &'a str> {
-    GenIter(move || {
+    GenIter(#[coroutine] move || {
         let mut s = String::new();
         yield &s[..] //~ ERROR cannot yield value referencing local variable `s` [E0515]
         //~| ERROR borrow may still be in use when coroutine yields
diff --git a/tests/ui/nll/match-guards-always-borrow.fixed b/tests/ui/nll/match-guards-always-borrow.fixed
new file mode 100644
index 00000000000..56e743bf196
--- /dev/null
+++ b/tests/ui/nll/match-guards-always-borrow.fixed
@@ -0,0 +1,66 @@
+#![feature(if_let_guard)]
+#![allow(unused_mut)]
+//@ run-rustfix
+
+// Here is arielb1's basic example from rust-lang/rust#27282
+// that AST borrowck is flummoxed by:
+
+fn should_reject_destructive_mutate_in_guard() {
+    match Some(&4) {
+        None => {},
+        ref mut foo if {
+            (|| { let mut bar = foo.clone(); bar.take() })();
+            //~^ ERROR cannot move out of `foo` in pattern guard [E0507]
+            false } => { },
+        Some(s) => std::process::exit(*s),
+    }
+
+    match Some(&4) {
+        None => {},
+        ref mut foo if let Some(()) = {
+            (|| { let mut bar = foo.clone(); bar.take() })();
+            //~^ ERROR cannot move out of `foo` in pattern guard [E0507]
+            None } => { },
+        Some(s) => std::process::exit(*s),
+    }
+}
+
+// Here below is a case that needs to keep working: we only use the
+// binding via immutable-borrow in the guard, and we mutate in the arm
+// body.
+fn allow_mutate_in_arm_body() {
+    match Some(&4) {
+        None => {},
+        ref mut foo if foo.is_some() => { foo.take(); () }
+        Some(s) => std::process::exit(*s),
+    }
+
+    match Some(&4) {
+        None => {},
+        ref mut foo if let Some(_) = foo => { foo.take(); () }
+        Some(s) => std::process::exit(*s),
+    }
+}
+
+// Here below is a case that needs to keep working: we only use the
+// binding via immutable-borrow in the guard, and we move into the arm
+// body.
+fn allow_move_into_arm_body() {
+    match Some(&4) {
+        None => {},
+        mut foo if foo.is_some() => { foo.unwrap(); () }
+        Some(s) => std::process::exit(*s),
+    }
+
+    match Some(&4) {
+        None => {},
+        mut foo if let Some(_) = foo => { foo.unwrap(); () }
+        Some(s) => std::process::exit(*s),
+    }
+}
+
+fn main() {
+    should_reject_destructive_mutate_in_guard();
+    allow_mutate_in_arm_body();
+    allow_move_into_arm_body();
+}
diff --git a/tests/ui/nll/match-guards-always-borrow.rs b/tests/ui/nll/match-guards-always-borrow.rs
index ff63cc09273..927d55c42a6 100644
--- a/tests/ui/nll/match-guards-always-borrow.rs
+++ b/tests/ui/nll/match-guards-always-borrow.rs
@@ -1,4 +1,6 @@
 #![feature(if_let_guard)]
+#![allow(unused_mut)]
+//@ run-rustfix
 
 // Here is arielb1's basic example from rust-lang/rust#27282
 // that AST borrowck is flummoxed by:
@@ -7,7 +9,7 @@ fn should_reject_destructive_mutate_in_guard() {
     match Some(&4) {
         None => {},
         ref mut foo if {
-            (|| { let bar = foo; bar.take() })();
+            (|| { let mut bar = foo; bar.take() })();
             //~^ ERROR cannot move out of `foo` in pattern guard [E0507]
             false } => { },
         Some(s) => std::process::exit(*s),
@@ -16,7 +18,7 @@ fn should_reject_destructive_mutate_in_guard() {
     match Some(&4) {
         None => {},
         ref mut foo if let Some(()) = {
-            (|| { let bar = foo; bar.take() })();
+            (|| { let mut bar = foo; bar.take() })();
             //~^ ERROR cannot move out of `foo` in pattern guard [E0507]
             None } => { },
         Some(s) => std::process::exit(*s),
diff --git a/tests/ui/nll/match-guards-always-borrow.stderr b/tests/ui/nll/match-guards-always-borrow.stderr
index afd853c403e..bb0c5bd4c97 100644
--- a/tests/ui/nll/match-guards-always-borrow.stderr
+++ b/tests/ui/nll/match-guards-always-borrow.stderr
@@ -1,22 +1,30 @@
 error[E0507]: cannot move out of `foo` in pattern guard
-  --> $DIR/match-guards-always-borrow.rs:10:14
+  --> $DIR/match-guards-always-borrow.rs:12:14
    |
-LL |             (|| { let bar = foo; bar.take() })();
-   |              ^^             --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait
+LL |             (|| { let mut bar = foo; bar.take() })();
+   |              ^^                 --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait
    |              |
    |              `foo` is moved here
    |
    = note: variables bound in patterns cannot be moved from until after the end of the pattern guard
+help: consider cloning the value if the performance cost is acceptable
+   |
+LL |             (|| { let mut bar = foo.clone(); bar.take() })();
+   |                                    ++++++++
 
 error[E0507]: cannot move out of `foo` in pattern guard
-  --> $DIR/match-guards-always-borrow.rs:19:14
+  --> $DIR/match-guards-always-borrow.rs:21:14
    |
-LL |             (|| { let bar = foo; bar.take() })();
-   |              ^^             --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait
+LL |             (|| { let mut bar = foo; bar.take() })();
+   |              ^^                 --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait
    |              |
    |              `foo` is moved here
    |
    = note: variables bound in patterns cannot be moved from until after the end of the pattern guard
+help: consider cloning the value if the performance cost is acceptable
+   |
+LL |             (|| { let mut bar = foo.clone(); bar.take() })();
+   |                                    ++++++++
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/nll/move-errors.stderr b/tests/ui/nll/move-errors.stderr
index 842ecaf524b..d1384121379 100644
--- a/tests/ui/nll/move-errors.stderr
+++ b/tests/ui/nll/move-errors.stderr
@@ -8,7 +8,10 @@ note: if `A` implemented `Clone`, you could clone the value
   --> $DIR/move-errors.rs:1:1
    |
 LL | struct A(String);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let b = *a;
+   |             -- you could clone this value
 help: consider removing the dereference here
    |
 LL -     let b = *a;
@@ -28,7 +31,10 @@ note: if `A` implemented `Clone`, you could clone the value
   --> $DIR/move-errors.rs:1:1
    |
 LL | struct A(String);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let b = a[0];
+   |             ---- you could clone this value
 help: consider borrowing here
    |
 LL |     let b = &a[0];
@@ -44,7 +50,10 @@ note: if `A` implemented `Clone`, you could clone the value
   --> $DIR/move-errors.rs:1:1
    |
 LL | struct A(String);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let s = **r;
+   |             --- you could clone this value
 help: consider removing the dereference here
    |
 LL -     let s = **r;
@@ -61,7 +70,10 @@ note: if `A` implemented `Clone`, you could clone the value
   --> $DIR/move-errors.rs:1:1
    |
 LL | struct A(String);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let s = *r;
+   |             -- you could clone this value
 help: consider removing the dereference here
    |
 LL -     let s = *r;
@@ -81,7 +93,10 @@ note: if `A` implemented `Clone`, you could clone the value
   --> $DIR/move-errors.rs:1:1
    |
 LL | struct A(String);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let a = [A("".to_string())][0];
+   |             ---------------------- you could clone this value
 help: consider borrowing here
    |
 LL |     let a = &[A("".to_string())][0];
@@ -126,7 +141,10 @@ note: if `A` implemented `Clone`, you could clone the value
   --> $DIR/move-errors.rs:1:1
    |
 LL | struct A(String);
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     b = *a;
+   |         -- you could clone this value
 
 error[E0508]: cannot move out of type `[B; 1]`, a non-copy array
   --> $DIR/move-errors.rs:74:11
diff --git a/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.nll.stderr b/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.nll.stderr
index 5227ca8ec17..1d086c658df 100644
--- a/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.nll.stderr
+++ b/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.nll.stderr
@@ -1,6 +1,8 @@
 error[E0597]: `a` does not live long enough
   --> $DIR/location-insensitive-scopes-issue-117146.rs:10:18
    |
+LL |     let a = ();
+   |         - binding `a` declared here
 LL |     let b = |_| &a;
    |             --- -^
    |             |   ||
diff --git a/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.polonius.stderr b/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.polonius.stderr
index 5227ca8ec17..1d086c658df 100644
--- a/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.polonius.stderr
+++ b/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.polonius.stderr
@@ -1,6 +1,8 @@
 error[E0597]: `a` does not live long enough
   --> $DIR/location-insensitive-scopes-issue-117146.rs:10:18
    |
+LL |     let a = ();
+   |         - binding `a` declared here
 LL |     let b = |_| &a;
    |             --- -^
    |             |   ||
diff --git a/tests/ui/nll/user-annotations/method-ufcs-1.stderr b/tests/ui/nll/user-annotations/method-ufcs-1.stderr
index c7c08c948ab..c42ea0172cf 100644
--- a/tests/ui/nll/user-annotations/method-ufcs-1.stderr
+++ b/tests/ui/nll/user-annotations/method-ufcs-1.stderr
@@ -33,7 +33,9 @@ error[E0597]: `a` does not live long enough
    |
 LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
    |                                              -- lifetime `'a` defined here
-...
+LL |     let a = 22;
+   |         - binding `a` declared here
+LL |     let b = 44;
 LL |     let _closure = || {
    |                    -- value captured here
 LL |         let c = 66;
diff --git a/tests/ui/nll/user-annotations/method-ufcs-2.stderr b/tests/ui/nll/user-annotations/method-ufcs-2.stderr
index b7861a3bd06..287337c7d52 100644
--- a/tests/ui/nll/user-annotations/method-ufcs-2.stderr
+++ b/tests/ui/nll/user-annotations/method-ufcs-2.stderr
@@ -34,7 +34,9 @@ error[E0597]: `b` does not live long enough
    |
 LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
    |                                              -- lifetime `'a` defined here
-...
+LL |     let a = 22;
+LL |     let b = 44;
+   |         - binding `b` declared here
 LL |     let _closure = || {
    |                    -- value captured here
 LL |         let c = 66;
diff --git a/tests/ui/packed/packed-struct-drop-aligned.rs b/tests/ui/packed/packed-struct-drop-aligned.rs
index 037b8cb78b7..ba3dcb10c61 100644
--- a/tests/ui/packed/packed-struct-drop-aligned.rs
+++ b/tests/ui/packed/packed-struct-drop-aligned.rs
@@ -1,5 +1,5 @@
 //@ run-pass
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![feature(coroutine_trait)]
 use std::cell::Cell;
 use std::mem;
@@ -7,13 +7,12 @@ use std::ops::Coroutine;
 use std::pin::Pin;
 
 struct Aligned<'a> {
-    drop_count: &'a Cell<usize>
+    drop_count: &'a Cell<usize>,
 }
 
 #[inline(never)]
 fn check_align(ptr: *const Aligned) {
-    assert_eq!(ptr as usize % mem::align_of::<Aligned>(),
-               0);
+    assert_eq!(ptr as usize % mem::align_of::<Aligned>(), 0);
 }
 
 impl<'a> Drop for Aligned<'a> {
@@ -39,7 +38,8 @@ fn main() {
     assert_eq!(drop_count.get(), 2);
 
     let drop_count = &Cell::new(0);
-    let mut g = || {
+    let mut g = #[coroutine]
+    || {
         let mut p = Packed(NotCopy(0), Aligned { drop_count });
         let _ = &p;
         p.1 = Aligned { drop_count };
diff --git a/tests/ui/parser/bad-let-else-statement.rs b/tests/ui/parser/bad-let-else-statement.rs
index c3126a493e5..de41a07568f 100644
--- a/tests/ui/parser/bad-let-else-statement.rs
+++ b/tests/ui/parser/bad-let-else-statement.rs
@@ -1,4 +1,3 @@
-#![feature(inline_const)]
 #![feature(yeet_expr)]
 #![allow(incomplete_features)] // Necessary for now, while explicit_tail_calls is incomplete
 #![feature(explicit_tail_calls)]
diff --git a/tests/ui/parser/bad-let-else-statement.stderr b/tests/ui/parser/bad-let-else-statement.stderr
index 12df8f849ab..3f7e176b3e3 100644
--- a/tests/ui/parser/bad-let-else-statement.stderr
+++ b/tests/ui/parser/bad-let-else-statement.stderr
@@ -1,5 +1,5 @@
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:10:5
+  --> $DIR/bad-let-else-statement.rs:9:5
    |
 LL |     } else {
    |     ^
@@ -13,7 +13,7 @@ LL ~     }) else {
    |
 
 error: `for...else` loops are not supported
-  --> $DIR/bad-let-else-statement.rs:19:7
+  --> $DIR/bad-let-else-statement.rs:18:7
    |
 LL |       let foo = for i in 1..2 {
    |                 --- `else` is attached to this loop
@@ -28,7 +28,7 @@ LL | |     };
    = note: consider moving this `else` clause to a separate `if` statement and use a `bool` variable to control if it should run
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:31:5
+  --> $DIR/bad-let-else-statement.rs:30:5
    |
 LL |     } else {
    |     ^
@@ -43,7 +43,7 @@ LL ~     }) else {
    |
 
 error: `loop...else` loops are not supported
-  --> $DIR/bad-let-else-statement.rs:40:7
+  --> $DIR/bad-let-else-statement.rs:39:7
    |
 LL |       let foo = loop {
    |                 ---- `else` is attached to this loop
@@ -58,7 +58,7 @@ LL | |     };
    = note: consider moving this `else` clause to a separate `if` statement and use a `bool` variable to control if it should run
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:51:5
+  --> $DIR/bad-let-else-statement.rs:50:5
    |
 LL |     } else {
    |     ^
@@ -73,7 +73,7 @@ LL ~     }) else {
    |
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:62:5
+  --> $DIR/bad-let-else-statement.rs:61:5
    |
 LL |     } else {
    |     ^
@@ -87,7 +87,7 @@ LL ~     }) else {
    |
 
 error: `while...else` loops are not supported
-  --> $DIR/bad-let-else-statement.rs:71:7
+  --> $DIR/bad-let-else-statement.rs:70:7
    |
 LL |       let foo = while false {
    |                 ----- `else` is attached to this loop
@@ -102,7 +102,7 @@ LL | |     };
    = note: consider moving this `else` clause to a separate `if` statement and use a `bool` variable to control if it should run
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:81:5
+  --> $DIR/bad-let-else-statement.rs:80:5
    |
 LL |     } else {
    |     ^
@@ -116,7 +116,7 @@ LL ~     }) else {
    |
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:91:5
+  --> $DIR/bad-let-else-statement.rs:90:5
    |
 LL |     } else {
    |     ^
@@ -130,7 +130,7 @@ LL ~     }) else {
    |
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:102:5
+  --> $DIR/bad-let-else-statement.rs:101:5
    |
 LL |     } else {
    |     ^
@@ -144,7 +144,7 @@ LL ~     }) else {
    |
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:112:5
+  --> $DIR/bad-let-else-statement.rs:111:5
    |
 LL |     } else {
    |     ^
@@ -158,7 +158,7 @@ LL ~     }) else {
    |
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:122:5
+  --> $DIR/bad-let-else-statement.rs:121:5
    |
 LL |     } else {
    |     ^
@@ -172,7 +172,7 @@ LL ~     }) else {
    |
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:132:5
+  --> $DIR/bad-let-else-statement.rs:131:5
    |
 LL |     } else {
    |     ^
@@ -186,7 +186,7 @@ LL ~     }) else {
    |
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:142:5
+  --> $DIR/bad-let-else-statement.rs:141:5
    |
 LL |     } else {
    |     ^
@@ -200,7 +200,7 @@ LL ~     }) else {
    |
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:152:5
+  --> $DIR/bad-let-else-statement.rs:151:5
    |
 LL |     } else {
    |     ^
@@ -214,7 +214,7 @@ LL ~     }) else {
    |
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:162:5
+  --> $DIR/bad-let-else-statement.rs:161:5
    |
 LL |     } else {
    |     ^
@@ -228,7 +228,7 @@ LL ~     }) else {
    |
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:172:5
+  --> $DIR/bad-let-else-statement.rs:171:5
    |
 LL |     } else {
    |     ^
@@ -242,7 +242,7 @@ LL ~     }) else {
    |
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:182:31
+  --> $DIR/bad-let-else-statement.rs:181:31
    |
 LL |     let bad = format_args! {""} else { return; };
    |                               ^
@@ -253,7 +253,7 @@ LL |     let bad = format_args! ("") else { return; };
    |                            ~  ~
 
 error: right curly brace `}` before `else` in a `let...else` statement not allowed
-  --> $DIR/bad-let-else-statement.rs:199:25
+  --> $DIR/bad-let-else-statement.rs:198:25
    |
 LL |             let x = a! {} else { return; };
    |                         ^
@@ -268,7 +268,7 @@ LL |             let x = a! () else { return; };
    |                        ~~
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:7:5
+  --> $DIR/bad-let-else-statement.rs:6:5
    |
 LL | /     let foo = {
 LL | |
@@ -281,7 +281,7 @@ LL | |     } else {
    = note: `#[warn(irrefutable_let_patterns)]` on by default
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:26:5
+  --> $DIR/bad-let-else-statement.rs:25:5
    |
 LL | /     let foo = if true {
 LL | |
@@ -295,7 +295,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:47:5
+  --> $DIR/bad-let-else-statement.rs:46:5
    |
 LL | /     let foo = match true {
 LL | |
@@ -308,7 +308,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:59:5
+  --> $DIR/bad-let-else-statement.rs:58:5
    |
 LL | /     let foo = X {
 LL | |
@@ -320,7 +320,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:78:5
+  --> $DIR/bad-let-else-statement.rs:77:5
    |
 LL | /     let foo = const {
 LL | |
@@ -332,7 +332,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:88:5
+  --> $DIR/bad-let-else-statement.rs:87:5
    |
 LL | /     let foo = &{
 LL | |
@@ -344,7 +344,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:99:5
+  --> $DIR/bad-let-else-statement.rs:98:5
    |
 LL | /     let foo = bar = {
 LL | |
@@ -356,7 +356,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 error[E0384]: cannot assign twice to immutable variable `bar`
-  --> $DIR/bad-let-else-statement.rs:99:15
+  --> $DIR/bad-let-else-statement.rs:98:15
    |
 LL |       let bar = 0;
    |           ---
@@ -371,7 +371,7 @@ LL | |     } else {
    | |_____^ cannot assign twice to immutable variable
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:109:5
+  --> $DIR/bad-let-else-statement.rs:108:5
    |
 LL | /     let foo = 1 + {
 LL | |
@@ -383,7 +383,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:119:5
+  --> $DIR/bad-let-else-statement.rs:118:5
    |
 LL | /     let foo = 1..{
 LL | |
@@ -395,7 +395,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:129:5
+  --> $DIR/bad-let-else-statement.rs:128:5
    |
 LL | /     let foo = return {
 LL | |
@@ -407,7 +407,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:139:5
+  --> $DIR/bad-let-else-statement.rs:138:5
    |
 LL | /     let foo = -{
 LL | |
@@ -419,7 +419,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:149:5
+  --> $DIR/bad-let-else-statement.rs:148:5
    |
 LL | /     let foo = do yeet {
 LL | |
@@ -431,7 +431,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:159:5
+  --> $DIR/bad-let-else-statement.rs:158:5
    |
 LL | /     let foo = become {
 LL | |
@@ -443,7 +443,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:169:5
+  --> $DIR/bad-let-else-statement.rs:168:5
    |
 LL | /     let foo = |x: i32| {
 LL | |
@@ -455,7 +455,7 @@ LL | |     } else {
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:179:5
+  --> $DIR/bad-let-else-statement.rs:178:5
    |
 LL |     let ok = format_args!("") else { return; };
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -464,7 +464,7 @@ LL |     let ok = format_args!("") else { return; };
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:182:5
+  --> $DIR/bad-let-else-statement.rs:181:5
    |
 LL |     let bad = format_args! {""} else { return; };
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -473,7 +473,7 @@ LL |     let bad = format_args! {""} else { return; };
    = help: consider removing the `else` clause
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:189:19
+  --> $DIR/bad-let-else-statement.rs:188:19
    |
 LL |           () => { {} }
    |  ___________________^
@@ -493,7 +493,7 @@ LL |       b!(1); b!(2);
    = note: this warning originates in the macro `b` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 warning: irrefutable `let...else` pattern
-  --> $DIR/bad-let-else-statement.rs:189:19
+  --> $DIR/bad-let-else-statement.rs:188:19
    |
 LL |           () => { {} }
    |  ___________________^
diff --git a/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr b/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr
index 00964cb8336..e925fe78f33 100644
--- a/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr
+++ b/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr
@@ -337,7 +337,10 @@ note: if `U` implemented `Clone`, you could clone the value
   --> $DIR/borrowck-pat-ref-mut-and-ref.rs:17:5
    |
 LL |     struct U;
-   |     ^^^^^^^^
+   |     ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {}
+   |                                                                  - you could clone this value
 
 error[E0507]: cannot move out of `b` in pattern guard
   --> $DIR/borrowck-pat-ref-mut-and-ref.rs:103:66
@@ -350,7 +353,10 @@ note: if `U` implemented `Clone`, you could clone the value
   --> $DIR/borrowck-pat-ref-mut-and-ref.rs:17:5
    |
 LL |     struct U;
-   |     ^^^^^^^^
+   |     ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {}
+   |                                                                  - you could clone this value
    = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
 
 error[E0507]: cannot move out of `a` in pattern guard
diff --git a/tests/ui/polymorphization/coroutine.rs b/tests/ui/polymorphization/coroutine.rs
index a989947f787..22ceadfb194 100644
--- a/tests/ui/polymorphization/coroutine.rs
+++ b/tests/ui/polymorphization/coroutine.rs
@@ -32,6 +32,7 @@ where
 
 #[rustc_polymorphize_error]
 pub fn unused_type<T>() -> impl Coroutine<(), Yield = u32, Return = u32> + Unpin {
+    #[coroutine]
     || {
         //~^ ERROR item has unused generic parameters
         yield 1;
@@ -41,6 +42,7 @@ pub fn unused_type<T>() -> impl Coroutine<(), Yield = u32, Return = u32> + Unpin
 
 #[rustc_polymorphize_error]
 pub fn used_type_in_yield<Y: Default>() -> impl Coroutine<(), Yield = Y, Return = u32> + Unpin {
+    #[coroutine]
     || {
         yield Y::default();
         2
@@ -49,6 +51,7 @@ pub fn used_type_in_yield<Y: Default>() -> impl Coroutine<(), Yield = Y, Return
 
 #[rustc_polymorphize_error]
 pub fn used_type_in_return<R: Default>() -> impl Coroutine<(), Yield = u32, Return = R> + Unpin {
+    #[coroutine]
     || {
         yield 3;
         R::default()
@@ -57,6 +60,7 @@ pub fn used_type_in_return<R: Default>() -> impl Coroutine<(), Yield = u32, Retu
 
 #[rustc_polymorphize_error]
 pub fn unused_const<const T: u32>() -> impl Coroutine<(), Yield = u32, Return = u32> + Unpin {
+    #[coroutine]
     || {
         //~^ ERROR item has unused generic parameters
         yield 1;
@@ -67,6 +71,7 @@ pub fn unused_const<const T: u32>() -> impl Coroutine<(), Yield = u32, Return =
 #[rustc_polymorphize_error]
 pub fn used_const_in_yield<const Y: u32>() -> impl Coroutine<(), Yield = u32, Return = u32> + Unpin
 {
+    #[coroutine]
     || {
         yield Y;
         2
@@ -76,6 +81,7 @@ pub fn used_const_in_yield<const Y: u32>() -> impl Coroutine<(), Yield = u32, Re
 #[rustc_polymorphize_error]
 pub fn used_const_in_return<const R: u32>() -> impl Coroutine<(), Yield = u32, Return = u32> + Unpin
 {
+    #[coroutine]
     || {
         yield 4;
         R
diff --git a/tests/ui/polymorphization/coroutine.stderr b/tests/ui/polymorphization/coroutine.stderr
index 67b55a59883..07e29184226 100644
--- a/tests/ui/polymorphization/coroutine.stderr
+++ b/tests/ui/polymorphization/coroutine.stderr
@@ -8,18 +8,20 @@ LL | #![feature(generic_const_exprs, coroutines, coroutine_trait, rustc_attrs)]
    = note: `#[warn(incomplete_features)]` on by default
 
 error: item has unused generic parameters
-  --> $DIR/coroutine.rs:35:5
+  --> $DIR/coroutine.rs:36:5
    |
 LL | pub fn unused_type<T>() -> impl Coroutine<(), Yield = u32, Return = u32> + Unpin {
    |                    - generic parameter `T` is unused
+LL |     #[coroutine]
 LL |     || {
    |     ^^
 
 error: item has unused generic parameters
-  --> $DIR/coroutine.rs:60:5
+  --> $DIR/coroutine.rs:64:5
    |
 LL | pub fn unused_const<const T: u32>() -> impl Coroutine<(), Yield = u32, Return = u32> + Unpin {
    |                     ------------ generic parameter `T` is unused
+LL |     #[coroutine]
 LL |     || {
    |     ^^
 
diff --git a/tests/ui/print_type_sizes/coroutine.rs b/tests/ui/print_type_sizes/coroutine.rs
index 61488c51f05..15335788789 100644
--- a/tests/ui/print_type_sizes/coroutine.rs
+++ b/tests/ui/print_type_sizes/coroutine.rs
@@ -7,6 +7,7 @@
 use std::ops::Coroutine;
 
 fn coroutine<const C: usize>(array: [u8; C]) -> impl Coroutine<Yield = (), Return = ()> {
+    #[coroutine]
     move |()| {
         yield ();
         let _ = array;
diff --git a/tests/ui/print_type_sizes/coroutine.stdout b/tests/ui/print_type_sizes/coroutine.stdout
index 5d51339558c..339bbddfc2a 100644
--- a/tests/ui/print_type_sizes/coroutine.stdout
+++ b/tests/ui/print_type_sizes/coroutine.stdout
@@ -1,4 +1,4 @@
-print-type-size type: `{coroutine@$DIR/coroutine.rs:10:5: 10:14}`: 8193 bytes, alignment: 1 bytes
+print-type-size type: `{coroutine@$DIR/coroutine.rs:11:5: 11:14}`: 8193 bytes, alignment: 1 bytes
 print-type-size     discriminant: 1 bytes
 print-type-size     variant `Unresumed`: 8192 bytes
 print-type-size         upvar `.array`: 8192 bytes
diff --git a/tests/ui/print_type_sizes/coroutine_discr_placement.rs b/tests/ui/print_type_sizes/coroutine_discr_placement.rs
index 4b9f67a7999..d97b0b28ed0 100644
--- a/tests/ui/print_type_sizes/coroutine_discr_placement.rs
+++ b/tests/ui/print_type_sizes/coroutine_discr_placement.rs
@@ -5,11 +5,12 @@
 // Tests a coroutine that has its discriminant as the *final* field.
 
 // Avoid emitting panic handlers, like the rest of these tests...
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![allow(dropping_copy_types)]
 
 pub fn foo() {
-    let a = || {
+    let a = #[coroutine]
+    || {
         {
             let w: i32 = 4;
             yield;
diff --git a/tests/ui/print_type_sizes/coroutine_discr_placement.stdout b/tests/ui/print_type_sizes/coroutine_discr_placement.stdout
index 71a7f3c6381..4ce1ce46f6e 100644
--- a/tests/ui/print_type_sizes/coroutine_discr_placement.stdout
+++ b/tests/ui/print_type_sizes/coroutine_discr_placement.stdout
@@ -1,4 +1,4 @@
-print-type-size type: `{coroutine@$DIR/coroutine_discr_placement.rs:12:13: 12:15}`: 8 bytes, alignment: 4 bytes
+print-type-size type: `{coroutine@$DIR/coroutine_discr_placement.rs:13:5: 13:7}`: 8 bytes, alignment: 4 bytes
 print-type-size     discriminant: 1 bytes
 print-type-size     variant `Unresumed`: 0 bytes
 print-type-size     variant `Suspend0`: 7 bytes
diff --git a/tests/ui/regions/regions-addr-of-upvar-self.stderr b/tests/ui/regions/regions-addr-of-upvar-self.stderr
index c16a6f8585b..3a028cc9e21 100644
--- a/tests/ui/regions/regions-addr-of-upvar-self.stderr
+++ b/tests/ui/regions/regions-addr-of-upvar-self.stderr
@@ -20,6 +20,8 @@ LL |             let p: &'static mut usize = &mut self.food;
 error[E0597]: `self` does not live long enough
   --> $DIR/regions-addr-of-upvar-self.rs:8:46
    |
+LL |     pub fn chase_cat(&mut self) {
+   |                      --------- binding `self` declared here
 LL |         let _f = || {
    |                  -- value captured here
 LL |             let p: &'static mut usize = &mut self.food;
diff --git a/tests/ui/regions/regions-nested-fns-2.stderr b/tests/ui/regions/regions-nested-fns-2.stderr
index 254497639a1..02359fe1213 100644
--- a/tests/ui/regions/regions-nested-fns-2.stderr
+++ b/tests/ui/regions/regions-nested-fns-2.stderr
@@ -1,6 +1,9 @@
 error[E0597]: `y` does not live long enough
   --> $DIR/regions-nested-fns-2.rs:7:25
    |
+LL |     let y = 3;
+   |         - binding `y` declared here
+LL |     ignore(
 LL |         |z| {
    |         --- value captured here
 LL |             if false { &y } else { z }
diff --git a/tests/ui/regions/regions-nested-fns.stderr b/tests/ui/regions/regions-nested-fns.stderr
index ee43f9fa572..23b3f78dd4e 100644
--- a/tests/ui/regions/regions-nested-fns.stderr
+++ b/tests/ui/regions/regions-nested-fns.stderr
@@ -27,6 +27,9 @@ LL | }
 error[E0597]: `y` does not live long enough
   --> $DIR/regions-nested-fns.rs:10:15
    |
+LL |     let y = 3;
+   |         - binding `y` declared here
+...
 LL |     ignore::<Box<dyn for<'z> FnMut(&'z isize)>>(Box::new(|z| {
    |                                                          --- value captured here
 LL |         ay = x;
diff --git a/tests/ui/regions/regions-steal-closure.stderr b/tests/ui/regions/regions-steal-closure.stderr
index 9324eb892a6..50068b32fa3 100644
--- a/tests/ui/regions/regions-steal-closure.stderr
+++ b/tests/ui/regions/regions-steal-closure.stderr
@@ -4,6 +4,7 @@ error[E0597]: `i` does not live long enough
 LL |     let mut cl_box = {
    |         ---------- borrow later stored here
 LL |         let mut i = 3;
+   |             ----- binding `i` declared here
 LL |         box_it(Box::new(|| i += 1))
    |                         -- ^ borrowed value does not live long enough
    |                         |
diff --git a/tests/ui/rfcs/rfc-2091-track-caller/tracked-closure.rs b/tests/ui/rfcs/rfc-2091-track-caller/tracked-closure.rs
index d5c8a529e1e..9fdceefbf9b 100644
--- a/tests/ui/rfcs/rfc-2091-track-caller/tracked-closure.rs
+++ b/tests/ui/rfcs/rfc-2091-track-caller/tracked-closure.rs
@@ -113,7 +113,7 @@ fn dyn_coroutine(
 }
 
 fn test_coroutine() {
-    let coroutine = #[track_caller] |arg: String| {
+    let coroutine = #[track_caller] #[coroutine] |arg: String| {
         yield ("first", arg.clone(), Location::caller());
         yield ("second", arg.clone(), Location::caller());
     };
@@ -136,7 +136,7 @@ fn test_coroutine() {
     assert_eq!(mono_loc.line(), mono_line);
     assert_eq!(mono_loc.column(), 42);
 
-    let non_tracked_coroutine = || { yield Location::caller(); };
+    let non_tracked_coroutine = #[coroutine] || { yield Location::caller(); };
     let non_tracked_line = line!() - 1; // This is the line of the coroutine, not its caller
     let non_tracked_loc = match Box::pin(non_tracked_coroutine).as_mut().resume(()) {
         CoroutineState::Yielded(val) => val,
@@ -144,7 +144,7 @@ fn test_coroutine() {
     };
     assert_eq!(non_tracked_loc.file(), file!());
     assert_eq!(non_tracked_loc.line(), non_tracked_line);
-    assert_eq!(non_tracked_loc.column(), 44);
+    assert_eq!(non_tracked_loc.column(), 57);
 
 }
 
diff --git a/tests/ui/sanitizer/cfi-coroutine.rs b/tests/ui/sanitizer/cfi-coroutine.rs
index 5c6a489a7e8..ad994fcf737 100644
--- a/tests/ui/sanitizer/cfi-coroutine.rs
+++ b/tests/ui/sanitizer/cfi-coroutine.rs
@@ -14,7 +14,7 @@
 //@ compile-flags: --test -Z unstable-options
 //@ run-pass
 
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 #![feature(coroutine_trait)]
 #![feature(noop_waker)]
 #![feature(gen_blocks)]
@@ -27,7 +27,7 @@ use std::async_iter::AsyncIterator;
 
 #[test]
 fn general_coroutine() {
-    let mut coro = |x: i32| {
+    let mut coro = #[coroutine] |x: i32| {
         yield x;
         "done"
     };
diff --git a/tests/ui/simd/const-err-trumps-simd-err.rs b/tests/ui/simd/const-err-trumps-simd-err.rs
index 06a747273ab..fda04434451 100644
--- a/tests/ui/simd/const-err-trumps-simd-err.rs
+++ b/tests/ui/simd/const-err-trumps-simd-err.rs
@@ -5,7 +5,7 @@
 #![feature(generic_arg_infer)]
 #![feature(core_intrinsics)]
 #![feature(repr_simd)]
-#![feature(inline_const)]
+
 use std::intrinsics::simd::*;
 
 #[repr(simd)]
diff --git a/tests/ui/simd/intrinsic/generic-elements-pass.rs b/tests/ui/simd/intrinsic/generic-elements-pass.rs
index 73003087819..a81d8ebdf50 100644
--- a/tests/ui/simd/intrinsic/generic-elements-pass.rs
+++ b/tests/ui/simd/intrinsic/generic-elements-pass.rs
@@ -2,7 +2,6 @@
 //@ ignore-emscripten FIXME(#45351) hits an LLVM assert
 
 #![feature(repr_simd, intrinsics)]
-#![feature(inline_const)]
 
 #[repr(simd)]
 #[derive(Copy, Clone, Debug, PartialEq)]
diff --git a/tests/ui/span/send-is-not-static-ensures-scoping.stderr b/tests/ui/span/send-is-not-static-ensures-scoping.stderr
index bae0befcaca..c15547e8412 100644
--- a/tests/ui/span/send-is-not-static-ensures-scoping.stderr
+++ b/tests/ui/span/send-is-not-static-ensures-scoping.stderr
@@ -16,6 +16,9 @@ error[E0597]: `y` does not live long enough
    |
 LL |     let bad = {
    |         --- borrow later stored here
+LL |         let x = 1;
+LL |         let y = &x;
+   |             - binding `y` declared here
 ...
 LL |         scoped(|| {
    |                -- value captured here
diff --git a/tests/ui/suggestions/issue-84973-blacklist.rs b/tests/ui/suggestions/issue-84973-blacklist.rs
index 6a35d779c1c..edc0637636b 100644
--- a/tests/ui/suggestions/issue-84973-blacklist.rs
+++ b/tests/ui/suggestions/issue-84973-blacklist.rs
@@ -14,7 +14,7 @@ struct S;
 fn main() {
     f_copy("".to_string()); //~ ERROR: the trait bound `String: Copy` is not satisfied [E0277]
     f_clone(S); //~ ERROR: the trait bound `S: Clone` is not satisfied [E0277]
-    f_unpin(static || { yield; });
+    f_unpin(#[coroutine] static || { yield; });
     //~^ ERROR: cannot be unpinned [E0277]
 
     let cl = || ();
diff --git a/tests/ui/suggestions/issue-84973-blacklist.stderr b/tests/ui/suggestions/issue-84973-blacklist.stderr
index 33338228328..4fd063e4692 100644
--- a/tests/ui/suggestions/issue-84973-blacklist.stderr
+++ b/tests/ui/suggestions/issue-84973-blacklist.stderr
@@ -36,11 +36,11 @@ LL + #[derive(Clone)]
 LL | struct S;
    |
 
-error[E0277]: `{static coroutine@$DIR/issue-84973-blacklist.rs:17:13: 17:22}` cannot be unpinned
-  --> $DIR/issue-84973-blacklist.rs:17:13
+error[E0277]: `{static coroutine@$DIR/issue-84973-blacklist.rs:17:26: 17:35}` cannot be unpinned
+  --> $DIR/issue-84973-blacklist.rs:17:26
    |
-LL |     f_unpin(static || { yield; });
-   |     ------- ^^^^^^^^^^^^^^^^^^^^ the trait `Unpin` is not implemented for `{static coroutine@$DIR/issue-84973-blacklist.rs:17:13: 17:22}`
+LL |     f_unpin(#[coroutine] static || { yield; });
+   |     -------              ^^^^^^^^^^^^^^^^^^^^ the trait `Unpin` is not implemented for `{static coroutine@$DIR/issue-84973-blacklist.rs:17:26: 17:35}`
    |     |
    |     required by a bound introduced by this call
    |
diff --git a/tests/ui/suggestions/option-content-move2.rs b/tests/ui/suggestions/option-content-move2.rs
index 88e8a5b7aee..b0104d9bafb 100644
--- a/tests/ui/suggestions/option-content-move2.rs
+++ b/tests/ui/suggestions/option-content-move2.rs
@@ -1,8 +1,10 @@
 struct NotCopyable;
+#[derive(Clone)]
+struct NotCopyableButCloneable;
 
 fn func<F: FnMut() -> H, H: FnMut()>(_: F) {}
 
-fn parse() {
+fn foo() {
     let mut var = None;
     func(|| {
         // Shouldn't suggest `move ||.as_ref()` here
@@ -12,5 +14,15 @@ fn parse() {
         }
     });
 }
+fn bar() {
+    let mut var = None;
+    func(|| {
+        // Shouldn't suggest `move ||.as_ref()` nor to `clone()` here
+        move || {
+        //~^ ERROR: cannot move out of `var`
+            var = Some(NotCopyableButCloneable);
+        }
+    });
+}
 
 fn main() {}
diff --git a/tests/ui/suggestions/option-content-move2.stderr b/tests/ui/suggestions/option-content-move2.stderr
index 0297c031ecc..be97cba17b9 100644
--- a/tests/ui/suggestions/option-content-move2.stderr
+++ b/tests/ui/suggestions/option-content-move2.stderr
@@ -1,5 +1,5 @@
 error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure
-  --> $DIR/option-content-move2.rs:9:9
+  --> $DIR/option-content-move2.rs:11:9
    |
 LL |     let mut var = None;
    |         ------- captured outer variable
@@ -15,6 +15,23 @@ LL |             var = Some(NotCopyable);
    |             variable moved due to use in closure
    |             move occurs because `var` has type `Option<NotCopyable>`, which does not implement the `Copy` trait
 
-error: aborting due to 1 previous error
+error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure
+  --> $DIR/option-content-move2.rs:21:9
+   |
+LL |     let mut var = None;
+   |         ------- captured outer variable
+LL |     func(|| {
+   |          -- captured by this `FnMut` closure
+LL |         // Shouldn't suggest `move ||.as_ref()` nor to `clone()` here
+LL |         move || {
+   |         ^^^^^^^ `var` is moved here
+LL |
+LL |             var = Some(NotCopyableButCloneable);
+   |             ---
+   |             |
+   |             variable moved due to use in closure
+   |             move occurs because `var` has type `Option<NotCopyableButCloneable>`, which does not implement the `Copy` trait
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.
diff --git a/tests/ui/suggestions/option-content-move3.rs b/tests/ui/suggestions/option-content-move3.rs
new file mode 100644
index 00000000000..a245309d97f
--- /dev/null
+++ b/tests/ui/suggestions/option-content-move3.rs
@@ -0,0 +1,30 @@
+#[derive(Debug)]
+struct NotCopyable;
+#[derive(Debug, Clone)]
+struct NotCopyableButCloneable;
+
+fn func<F: FnMut() -> H, H: FnMut()>(_: F) {}
+
+fn foo() {
+    let var = NotCopyable;
+    func(|| {
+        // Shouldn't suggest `move ||.as_ref()` here
+        move || { //~ ERROR cannot move out of `var`
+            let x = var; //~ ERROR cannot move out of `var`
+            println!("{x:?}");
+        }
+    });
+}
+
+fn bar() {
+    let var = NotCopyableButCloneable;
+    func(|| {
+        // Shouldn't suggest `move ||.as_ref()` here
+        move || { //~ ERROR cannot move out of `var`
+            let x = var; //~ ERROR cannot move out of `var`
+            println!("{x:?}");
+        }
+    });
+}
+
+fn main() {}
diff --git a/tests/ui/suggestions/option-content-move3.stderr b/tests/ui/suggestions/option-content-move3.stderr
new file mode 100644
index 00000000000..a20dcce1ee3
--- /dev/null
+++ b/tests/ui/suggestions/option-content-move3.stderr
@@ -0,0 +1,95 @@
+error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure
+  --> $DIR/option-content-move3.rs:13:21
+   |
+LL |     let var = NotCopyable;
+   |         --- captured outer variable
+...
+LL |         move || {
+   |         ------- captured by this `FnMut` closure
+LL |             let x = var;
+   |                     ^^^ move occurs because `var` has type `NotCopyable`, which does not implement the `Copy` trait
+   |
+note: if `NotCopyable` implemented `Clone`, you could clone the value
+  --> $DIR/option-content-move3.rs:2:1
+   |
+LL | struct NotCopyable;
+   | ^^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |             let x = var;
+   |                     --- you could clone this value
+help: consider borrowing here
+   |
+LL |             let x = &var;
+   |                     +
+
+error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure
+  --> $DIR/option-content-move3.rs:12:9
+   |
+LL |     let var = NotCopyable;
+   |         --- captured outer variable
+LL |     func(|| {
+   |          -- captured by this `FnMut` closure
+LL |         // Shouldn't suggest `move ||.as_ref()` here
+LL |         move || {
+   |         ^^^^^^^ `var` is moved here
+LL |             let x = var;
+   |                     ---
+   |                     |
+   |                     variable moved due to use in closure
+   |                     move occurs because `var` has type `NotCopyable`, which does not implement the `Copy` trait
+   |
+note: if `NotCopyable` implemented `Clone`, you could clone the value
+  --> $DIR/option-content-move3.rs:2:1
+   |
+LL | struct NotCopyable;
+   | ^^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |             let x = var;
+   |                     --- you could clone this value
+
+error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure
+  --> $DIR/option-content-move3.rs:24:21
+   |
+LL |     let var = NotCopyableButCloneable;
+   |         --- captured outer variable
+...
+LL |         move || {
+   |         ------- captured by this `FnMut` closure
+LL |             let x = var;
+   |                     ^^^ move occurs because `var` has type `NotCopyableButCloneable`, which does not implement the `Copy` trait
+   |
+help: consider borrowing here
+   |
+LL |             let x = &var;
+   |                     +
+
+error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure
+  --> $DIR/option-content-move3.rs:23:9
+   |
+LL |     let var = NotCopyableButCloneable;
+   |         --- captured outer variable
+LL |     func(|| {
+   |          -- captured by this `FnMut` closure
+LL |         // Shouldn't suggest `move ||.as_ref()` here
+LL |         move || {
+   |         ^^^^^^^ `var` is moved here
+LL |             let x = var;
+   |                     ---
+   |                     |
+   |                     variable moved due to use in closure
+   |                     move occurs because `var` has type `NotCopyableButCloneable`, which does not implement the `Copy` trait
+   |
+help: clone the value before moving it into the closure
+   |
+LL ~         {
+LL +         let value = var.clone();
+LL ~         move || {
+LL ~             let x = value;
+LL |             println!("{x:?}");
+LL ~         }
+LL +         }
+   |
+
+error: aborting due to 4 previous errors
+
+For more information about this error, try `rustc --explain E0507`.
diff --git a/tests/ui/suggestions/unnamable-types.rs b/tests/ui/suggestions/unnamable-types.rs
index a4e32d7c806..dd2c3536eb9 100644
--- a/tests/ui/suggestions/unnamable-types.rs
+++ b/tests/ui/suggestions/unnamable-types.rs
@@ -1,7 +1,7 @@
 // Test that we do not suggest to add type annotations for unnamable types.
 
 #![crate_type="lib"]
-#![feature(coroutines)]
+#![feature(coroutines, stmt_expr_attributes)]
 
 const A = 5;
 //~^ ERROR: missing type for `const` item
@@ -34,6 +34,6 @@ const F = S { t: foo };
 //~| HELP: provide a type for the constant
 
 
-const G = || -> i32 { yield 0; return 1; };
+const G = #[coroutine] || -> i32 { yield 0; return 1; };
 //~^ ERROR: missing type for `const` item
 //~| NOTE: however, the inferred type
diff --git a/tests/ui/suggestions/unnamable-types.stderr b/tests/ui/suggestions/unnamable-types.stderr
index d003b91691c..6623678fd0c 100644
--- a/tests/ui/suggestions/unnamable-types.stderr
+++ b/tests/ui/suggestions/unnamable-types.stderr
@@ -52,14 +52,14 @@ LL | const F = S { t: foo };
 error: missing type for `const` item
   --> $DIR/unnamable-types.rs:37:8
    |
-LL | const G = || -> i32 { yield 0; return 1; };
+LL | const G = #[coroutine] || -> i32 { yield 0; return 1; };
    |        ^
    |
-note: however, the inferred type `{coroutine@$DIR/unnamable-types.rs:37:11: 37:20}` cannot be named
-  --> $DIR/unnamable-types.rs:37:11
+note: however, the inferred type `{coroutine@$DIR/unnamable-types.rs:37:24: 37:33}` cannot be named
+  --> $DIR/unnamable-types.rs:37:24
    |
-LL | const G = || -> i32 { yield 0; return 1; };
-   |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL | const G = #[coroutine] || -> i32 { yield 0; return 1; };
+   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to 7 previous errors
 
diff --git a/tests/ui/traits/next-solver/coroutine.fail.stderr b/tests/ui/traits/next-solver/coroutine.fail.stderr
index 14e67727d0b..e880d05a4dd 100644
--- a/tests/ui/traits/next-solver/coroutine.fail.stderr
+++ b/tests/ui/traits/next-solver/coroutine.fail.stderr
@@ -1,16 +1,16 @@
-error[E0277]: the trait bound `{coroutine@$DIR/coroutine.rs:18:21: 18:23}: Coroutine<A>` is not satisfied
-  --> $DIR/coroutine.rs:18:21
+error[E0277]: the trait bound `{coroutine@$DIR/coroutine.rs:20:9: 20:11}: Coroutine<A>` is not satisfied
+  --> $DIR/coroutine.rs:20:9
    |
-LL |       needs_coroutine(|| {
-   |  _____---------------_^
-   | |     |
-   | |     required by a bound introduced by this call
+LL |       needs_coroutine(
+   |       --------------- required by a bound introduced by this call
+LL |           #[coroutine]
+LL | /         || {
 LL | |
 LL | |
 LL | |
-LL | |         yield ();
-LL | |     });
-   | |_____^ the trait `Coroutine<A>` is not implemented for `{coroutine@$DIR/coroutine.rs:18:21: 18:23}`
+LL | |             yield ();
+LL | |         },
+   | |_________^ the trait `Coroutine<A>` is not implemented for `{coroutine@$DIR/coroutine.rs:20:9: 20:11}`
    |
 note: required by a bound in `needs_coroutine`
   --> $DIR/coroutine.rs:14:28
@@ -18,19 +18,19 @@ note: required by a bound in `needs_coroutine`
 LL | fn needs_coroutine(_: impl Coroutine<A, Yield = B, Return = C>) {}
    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `needs_coroutine`
 
-error[E0271]: type mismatch resolving `<{coroutine@$DIR/coroutine.rs:18:21: 18:23} as Coroutine<A>>::Yield == B`
-  --> $DIR/coroutine.rs:18:21
+error[E0271]: type mismatch resolving `<{coroutine@$DIR/coroutine.rs:20:9: 20:11} as Coroutine<A>>::Yield == B`
+  --> $DIR/coroutine.rs:20:9
    |
-LL |       needs_coroutine(|| {
-   |  _____---------------_^
-   | |     |
-   | |     required by a bound introduced by this call
+LL |       needs_coroutine(
+   |       --------------- required by a bound introduced by this call
+LL |           #[coroutine]
+LL | /         || {
 LL | |
 LL | |
 LL | |
-LL | |         yield ();
-LL | |     });
-   | |_____^ types differ
+LL | |             yield ();
+LL | |         },
+   | |_________^ types differ
    |
 note: required by a bound in `needs_coroutine`
   --> $DIR/coroutine.rs:14:41
@@ -38,19 +38,19 @@ note: required by a bound in `needs_coroutine`
 LL | fn needs_coroutine(_: impl Coroutine<A, Yield = B, Return = C>) {}
    |                                         ^^^^^^^^^ required by this bound in `needs_coroutine`
 
-error[E0271]: type mismatch resolving `<{coroutine@$DIR/coroutine.rs:18:21: 18:23} as Coroutine<A>>::Return == C`
-  --> $DIR/coroutine.rs:18:21
+error[E0271]: type mismatch resolving `<{coroutine@$DIR/coroutine.rs:20:9: 20:11} as Coroutine<A>>::Return == C`
+  --> $DIR/coroutine.rs:20:9
    |
-LL |       needs_coroutine(|| {
-   |  _____---------------_^
-   | |     |
-   | |     required by a bound introduced by this call
+LL |       needs_coroutine(
+   |       --------------- required by a bound introduced by this call
+LL |           #[coroutine]
+LL | /         || {
 LL | |
 LL | |
 LL | |
-LL | |         yield ();
-LL | |     });
-   | |_____^ types differ
+LL | |             yield ();
+LL | |         },
+   | |_________^ types differ
    |
 note: required by a bound in `needs_coroutine`
   --> $DIR/coroutine.rs:14:52
diff --git a/tests/ui/traits/next-solver/coroutine.rs b/tests/ui/traits/next-solver/coroutine.rs
index 2b5bf01cefd..1882a62cf29 100644
--- a/tests/ui/traits/next-solver/coroutine.rs
+++ b/tests/ui/traits/next-solver/coroutine.rs
@@ -15,18 +15,24 @@ fn needs_coroutine(_: impl Coroutine<A, Yield = B, Return = C>) {}
 
 #[cfg(fail)]
 fn main() {
-    needs_coroutine(|| {
-        //[fail]~^ ERROR Coroutine<A>` is not satisfied
-        //[fail]~| ERROR as Coroutine<A>>::Yield == B`
-        //[fail]~| ERROR as Coroutine<A>>::Return == C`
-        yield ();
-    });
+    needs_coroutine(
+        #[coroutine]
+        || {
+            //[fail]~^ ERROR Coroutine<A>` is not satisfied
+            //[fail]~| ERROR as Coroutine<A>>::Yield == B`
+            //[fail]~| ERROR as Coroutine<A>>::Return == C`
+            yield ();
+        },
+    );
 }
 
 #[cfg(pass)]
 fn main() {
-    needs_coroutine(|_: A| {
-        let _: A = yield B;
-        C
-    })
+    needs_coroutine(
+        #[coroutine]
+        |_: A| {
+            let _: A = yield B;
+            C
+        },
+    )
 }
diff --git a/tests/ui/type-alias-impl-trait/issue-53678-coroutine-and-const-fn.rs b/tests/ui/type-alias-impl-trait/issue-53678-coroutine-and-const-fn.rs
index cd14bc1fd09..0d9126d3993 100644
--- a/tests/ui/type-alias-impl-trait/issue-53678-coroutine-and-const-fn.rs
+++ b/tests/ui/type-alias-impl-trait/issue-53678-coroutine-and-const-fn.rs
@@ -9,6 +9,7 @@ mod gen {
     pub type CoroOnce<Y, R> = impl Coroutine<Yield = Y, Return = R>;
 
     pub const fn const_coroutine<Y, R>(yielding: Y, returning: R) -> CoroOnce<Y, R> {
+        #[coroutine]
         move || {
             yield yielding;
 
diff --git a/tests/ui/type-alias-impl-trait/issue-58662-coroutine-with-lifetime.rs b/tests/ui/type-alias-impl-trait/issue-58662-coroutine-with-lifetime.rs
index 78a1d5116be..899e81ed562 100644
--- a/tests/ui/type-alias-impl-trait/issue-58662-coroutine-with-lifetime.rs
+++ b/tests/ui/type-alias-impl-trait/issue-58662-coroutine-with-lifetime.rs
@@ -8,6 +8,7 @@ use std::pin::Pin;
 
 type RandCoroutine<'a> = impl Coroutine<Return = (), Yield = u64> + 'a;
 fn rand_coroutine<'a>(rng: &'a ()) -> RandCoroutine<'a> {
+    #[coroutine]
     move || {
         let _rng = rng;
         loop {
@@ -19,6 +20,7 @@ fn rand_coroutine<'a>(rng: &'a ()) -> RandCoroutine<'a> {
 pub type RandCoroutineWithIndirection<'c> = impl Coroutine<Return = (), Yield = u64> + 'c;
 pub fn rand_coroutine_with_indirection<'a>(rng: &'a ()) -> RandCoroutineWithIndirection<'a> {
     fn helper<'b>(rng: &'b ()) -> impl 'b + Coroutine<Return = (), Yield = u64> {
+        #[coroutine]
         move || {
             let _rng = rng;
             loop {
diff --git a/tests/ui/type-alias-impl-trait/issue-94429.rs b/tests/ui/type-alias-impl-trait/issue-94429.rs
index 306e73003fa..11beed06a20 100644
--- a/tests/ui/type-alias-impl-trait/issue-94429.rs
+++ b/tests/ui/type-alias-impl-trait/issue-94429.rs
@@ -14,6 +14,7 @@ impl Runnable for Implementor {
 
     fn run(&mut self) -> Self::Coro {
         //~^ ERROR: type mismatch resolving
+        #[coroutine]
         move || {
             yield 1;
         }
diff --git a/tests/ui/type-alias-impl-trait/issue-94429.stderr b/tests/ui/type-alias-impl-trait/issue-94429.stderr
index 5d081e6b1ef..4c2020becbe 100644
--- a/tests/ui/type-alias-impl-trait/issue-94429.stderr
+++ b/tests/ui/type-alias-impl-trait/issue-94429.stderr
@@ -1,4 +1,4 @@
-error[E0271]: type mismatch resolving `<{coroutine@$DIR/issue-94429.rs:17:9: 17:16} as Coroutine>::Yield == ()`
+error[E0271]: type mismatch resolving `<{coroutine@$DIR/issue-94429.rs:18:9: 18:16} as Coroutine>::Yield == ()`
   --> $DIR/issue-94429.rs:15:26
    |
 LL |     fn run(&mut self) -> Self::Coro {
diff --git a/tests/ui/unboxed-closures/unboxed-closures-failed-recursive-fn-1.stderr b/tests/ui/unboxed-closures/unboxed-closures-failed-recursive-fn-1.stderr
index 23aa18d7156..fc6f610ddd4 100644
--- a/tests/ui/unboxed-closures/unboxed-closures-failed-recursive-fn-1.stderr
+++ b/tests/ui/unboxed-closures/unboxed-closures-failed-recursive-fn-1.stderr
@@ -1,6 +1,9 @@
 error[E0597]: `factorial` does not live long enough
   --> $DIR/unboxed-closures-failed-recursive-fn-1.rs:15:17
    |
+LL |     let mut factorial: Option<Box<dyn Fn(u32) -> u32>> = None;
+   |         ------------- binding `factorial` declared here
+LL |
 LL |     let f = |x: u32| -> u32 {
    |             --------------- value captured here
 LL |         let g = factorial.as_ref().unwrap();
@@ -30,7 +33,9 @@ error[E0597]: `factorial` does not live long enough
   --> $DIR/unboxed-closures-failed-recursive-fn-1.rs:28:17
    |
 LL |     let mut factorial: Option<Box<dyn Fn(u32) -> u32 + 'static>> = None;
-   |                        ----------------------------------------- type annotation requires that `factorial` is borrowed for `'static`
+   |         -------------  ----------------------------------------- type annotation requires that `factorial` is borrowed for `'static`
+   |         |
+   |         binding `factorial` declared here
 LL |
 LL |     let f = |x: u32| -> u32 {
    |             --------------- value captured here
diff --git a/tests/ui/union/union-borrow-move-parent-sibling.stderr b/tests/ui/union/union-borrow-move-parent-sibling.stderr
index 782fa63280e..f8e9609cb1c 100644
--- a/tests/ui/union/union-borrow-move-parent-sibling.stderr
+++ b/tests/ui/union/union-borrow-move-parent-sibling.stderr
@@ -54,7 +54,10 @@ note: if `MockVec<u8>` implemented `Clone`, you could clone the value
   --> $DIR/union-borrow-move-parent-sibling.rs:25:1
    |
 LL | struct MockVec<T> {
-   | ^^^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |     let a = (u.x.0).0;
+   |             --------- you could clone this value
 help: consider borrowing here
    |
 LL |     let a = &(u.x.0).0;
diff --git a/tests/ui/union/union-move.stderr b/tests/ui/union/union-move.stderr
index 5ebb2716e5a..d520fb00ea9 100644
--- a/tests/ui/union/union-move.stderr
+++ b/tests/ui/union/union-move.stderr
@@ -20,7 +20,10 @@ note: if `U1` implemented `Clone`, you could clone the value
   --> $DIR/union-move.rs:9:1
    |
 LL | union U1 {
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         move_out(x.f1_nocopy);
+   |                  ----------- you could clone this value
 
 error[E0382]: use of moved value: `x`
   --> $DIR/union-move.rs:42:18
@@ -44,7 +47,10 @@ note: if `U1` implemented `Clone`, you could clone the value
   --> $DIR/union-move.rs:9:1
    |
 LL | union U1 {
-   | ^^^^^^^^
+   | ^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         move_out(x.f2_nocopy);
+   |                  ----------- you could clone this value
 
 error[E0509]: cannot move out of type `U2`, which implements the `Drop` trait
   --> $DIR/union-move.rs:49:18
diff --git a/tests/ui/unop-move-semantics.stderr b/tests/ui/unop-move-semantics.stderr
index 187dd66b2fe..bc9b3ea9903 100644
--- a/tests/ui/unop-move-semantics.stderr
+++ b/tests/ui/unop-move-semantics.stderr
@@ -33,6 +33,14 @@ LL |     !x;
 ...
 LL |     use_mut(n); use_imm(m);
    |                         - borrow later used here
+   |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/unop-move-semantics.rs:11:18
+   |
+LL | fn move_borrowed<T: Not<Output=T>>(x: T, mut y: T) {
+   |                  ^ consider constraining this type parameter with `Clone`
+LL |     let m = &x;
+   |             -- you could clone this value
 
 error[E0505]: cannot move out of `y` because it is borrowed
   --> $DIR/unop-move-semantics.rs:17:6
@@ -47,6 +55,15 @@ LL |     !y;
    |      ^ move out of `y` occurs here
 LL |     use_mut(n); use_imm(m);
    |             - borrow later used here
+   |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/unop-move-semantics.rs:11:18
+   |
+LL | fn move_borrowed<T: Not<Output=T>>(x: T, mut y: T) {
+   |                  ^ consider constraining this type parameter with `Clone`
+LL |     let m = &x;
+LL |     let n = &mut y;
+   |             ------ you could clone this value
 
 error[E0507]: cannot move out of `*m` which is behind a mutable reference
   --> $DIR/unop-move-semantics.rs:24:6
@@ -59,6 +76,14 @@ LL |     !*m;
    |
 note: calling this operator moves the value
   --> $SRC_DIR/core/src/ops/bit.rs:LL:COL
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/unop-move-semantics.rs:20:24
+   |
+LL | fn illegal_dereference<T: Not<Output=T>>(mut x: T, y: T) {
+   |                        ^ consider constraining this type parameter with `Clone`
+...
+LL |     !*m;
+   |      -- you could clone this value
 
 error[E0507]: cannot move out of `*n` which is behind a shared reference
   --> $DIR/unop-move-semantics.rs:26:6
@@ -68,6 +93,15 @@ LL |     !*n;
    |     ||
    |     |move occurs because `*n` has type `T`, which does not implement the `Copy` trait
    |     `*n` moved due to usage in operator
+   |
+help: if `T` implemented `Clone`, you could clone the value
+  --> $DIR/unop-move-semantics.rs:20:24
+   |
+LL | fn illegal_dereference<T: Not<Output=T>>(mut x: T, y: T) {
+   |                        ^ consider constraining this type parameter with `Clone`
+...
+LL |     !*n;
+   |      -- you could clone this value
 
 error: aborting due to 5 previous errors
 
diff --git a/tests/ui/variance/variance-issue-20533.stderr b/tests/ui/variance/variance-issue-20533.stderr
index 4515d313ec0..03cada07a9e 100644
--- a/tests/ui/variance/variance-issue-20533.stderr
+++ b/tests/ui/variance/variance-issue-20533.stderr
@@ -14,7 +14,10 @@ note: if `AffineU32` implemented `Clone`, you could clone the value
   --> $DIR/variance-issue-20533.rs:26:1
    |
 LL | struct AffineU32(u32);
-   | ^^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         let x = foo(&a);
+   |                     -- you could clone this value
 
 error[E0505]: cannot move out of `a` because it is borrowed
   --> $DIR/variance-issue-20533.rs:41:14
@@ -32,7 +35,10 @@ note: if `AffineU32` implemented `Clone`, you could clone the value
   --> $DIR/variance-issue-20533.rs:26:1
    |
 LL | struct AffineU32(u32);
-   | ^^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         let x = bar(&a);
+   |                     -- you could clone this value
 
 error[E0505]: cannot move out of `a` because it is borrowed
   --> $DIR/variance-issue-20533.rs:47:14
@@ -50,7 +56,10 @@ note: if `AffineU32` implemented `Clone`, you could clone the value
   --> $DIR/variance-issue-20533.rs:26:1
    |
 LL | struct AffineU32(u32);
-   | ^^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
+...
+LL |         let x = baz(&a);
+   |                     -- you could clone this value
 
 error[E0505]: cannot move out of `a` because it is borrowed
   --> $DIR/variance-issue-20533.rs:53:14
diff --git a/tests/ui/weird-exprs.rs b/tests/ui/weird-exprs.rs
index 0009ed0e34c..08b5517aae2 100644
--- a/tests/ui/weird-exprs.rs
+++ b/tests/ui/weird-exprs.rs
@@ -152,6 +152,7 @@ fn r#match() {
 }
 
 fn i_yield() {
+    #[coroutine]
     static || {
         yield yield yield yield yield yield yield yield yield;
     };