diff options
Diffstat (limited to 'tests')
10 files changed, 339 insertions, 14 deletions
diff --git a/tests/ui/associated-types/impl-wf-cycle-4.rs b/tests/ui/associated-types/impl-wf-cycle-4.rs index bfa8adc71a1..1c1b3991d32 100644 --- a/tests/ui/associated-types/impl-wf-cycle-4.rs +++ b/tests/ui/associated-types/impl-wf-cycle-4.rs @@ -2,7 +2,7 @@ trait Filter { type ToMatch; } -impl<T> Filter for T //~ ERROR overflow evaluating the requirement +impl<T> Filter for T //~ ERROR cycle detected when where T: Fn(Self::ToMatch), { diff --git a/tests/ui/associated-types/impl-wf-cycle-4.stderr b/tests/ui/associated-types/impl-wf-cycle-4.stderr index cdbac267d34..c966579aecf 100644 --- a/tests/ui/associated-types/impl-wf-cycle-4.stderr +++ b/tests/ui/associated-types/impl-wf-cycle-4.stderr @@ -1,4 +1,4 @@ -error[E0275]: overflow evaluating the requirement `<T as Filter>::ToMatch == <T as Filter>::ToMatch` +error[E0391]: cycle detected when computing normalized predicates of `<impl at $DIR/impl-wf-cycle-4.rs:5:1: 7:26>` --> $DIR/impl-wf-cycle-4.rs:5:1 | LL | / impl<T> Filter for T @@ -6,20 +6,23 @@ LL | | where LL | | T: Fn(Self::ToMatch), | |_________________________^ | -note: required for `T` to implement `Filter` - --> $DIR/impl-wf-cycle-4.rs:5:9 +note: ...which requires computing whether `<impl at $DIR/impl-wf-cycle-4.rs:5:1: 7:26>` has a guaranteed unsized self type... + --> $DIR/impl-wf-cycle-4.rs:5:1 | -LL | impl<T> Filter for T - | ^^^^^^ ^ -LL | where -LL | T: Fn(Self::ToMatch), - | ----------------- unsatisfied trait bound introduced here -note: associated types for the current `impl` cannot be restricted in `where` clauses - --> $DIR/impl-wf-cycle-4.rs:7:11 +LL | / impl<T> Filter for T +LL | | where +LL | | T: Fn(Self::ToMatch), + | |_________________________^ + = note: ...which again requires computing normalized predicates of `<impl at $DIR/impl-wf-cycle-4.rs:5:1: 7:26>`, completing the cycle +note: cycle used when checking that `<impl at $DIR/impl-wf-cycle-4.rs:5:1: 7:26>` is well-formed + --> $DIR/impl-wf-cycle-4.rs:5:1 | -LL | T: Fn(Self::ToMatch), - | ^^^^^^^^^^^^^ +LL | / impl<T> Filter for T +LL | | where +LL | | T: Fn(Self::ToMatch), + | |_________________________^ + = 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: aborting due to 1 previous error -For more information about this error, try `rustc --explain E0275`. +For more information about this error, try `rustc --explain E0391`. diff --git a/tests/ui/traits/trivial-unsized-projection-2.bad.stderr b/tests/ui/traits/trivial-unsized-projection-2.bad.stderr new file mode 100644 index 00000000000..bf8d3c40cf6 --- /dev/null +++ b/tests/ui/traits/trivial-unsized-projection-2.bad.stderr @@ -0,0 +1,54 @@ +error[E0277]: the size for values of type `[()]` cannot be known at compilation time + --> $DIR/trivial-unsized-projection-2.rs:22:12 + | +LL | const FOO: <Tail as Bad>::Assert = todo!(); + | ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: within `Tail`, the trait `Sized` is not implemented for `[()]` +note: required because it appears within the type `Tail` + --> $DIR/trivial-unsized-projection-2.rs:17:8 + | +LL | struct Tail([()]); + | ^^^^ +note: required by a bound in `Bad::Assert` + --> $DIR/trivial-unsized-projection-2.rs:14:15 + | +LL | type Assert + | ------ required by a bound in this associated type +LL | where +LL | Self: Sized; + | ^^^^^ required by this bound in `Bad::Assert` +help: consider relaxing the implicit `Sized` restriction + | +LL | type Assert: ?Sized + | ++++++++ + +error[E0277]: the size for values of type `[()]` cannot be known at compilation time + --> $DIR/trivial-unsized-projection-2.rs:22:12 + | +LL | const FOO: <Tail as Bad>::Assert = todo!(); + | ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: within `Tail`, the trait `Sized` is not implemented for `[()]` +note: required because it appears within the type `Tail` + --> $DIR/trivial-unsized-projection-2.rs:17:8 + | +LL | struct Tail([()]); + | ^^^^ +note: required by a bound in `Bad::Assert` + --> $DIR/trivial-unsized-projection-2.rs:14:15 + | +LL | type Assert + | ------ required by a bound in this associated type +LL | where +LL | Self: Sized; + | ^^^^^ required by this bound in `Bad::Assert` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` +help: consider relaxing the implicit `Sized` restriction + | +LL | type Assert: ?Sized + | ++++++++ + +error: aborting due to 2 previous errors + +For more information about this error, try `rustc --explain E0277`. diff --git a/tests/ui/traits/trivial-unsized-projection-2.bad_new.stderr b/tests/ui/traits/trivial-unsized-projection-2.bad_new.stderr new file mode 100644 index 00000000000..bf8d3c40cf6 --- /dev/null +++ b/tests/ui/traits/trivial-unsized-projection-2.bad_new.stderr @@ -0,0 +1,54 @@ +error[E0277]: the size for values of type `[()]` cannot be known at compilation time + --> $DIR/trivial-unsized-projection-2.rs:22:12 + | +LL | const FOO: <Tail as Bad>::Assert = todo!(); + | ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: within `Tail`, the trait `Sized` is not implemented for `[()]` +note: required because it appears within the type `Tail` + --> $DIR/trivial-unsized-projection-2.rs:17:8 + | +LL | struct Tail([()]); + | ^^^^ +note: required by a bound in `Bad::Assert` + --> $DIR/trivial-unsized-projection-2.rs:14:15 + | +LL | type Assert + | ------ required by a bound in this associated type +LL | where +LL | Self: Sized; + | ^^^^^ required by this bound in `Bad::Assert` +help: consider relaxing the implicit `Sized` restriction + | +LL | type Assert: ?Sized + | ++++++++ + +error[E0277]: the size for values of type `[()]` cannot be known at compilation time + --> $DIR/trivial-unsized-projection-2.rs:22:12 + | +LL | const FOO: <Tail as Bad>::Assert = todo!(); + | ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: within `Tail`, the trait `Sized` is not implemented for `[()]` +note: required because it appears within the type `Tail` + --> $DIR/trivial-unsized-projection-2.rs:17:8 + | +LL | struct Tail([()]); + | ^^^^ +note: required by a bound in `Bad::Assert` + --> $DIR/trivial-unsized-projection-2.rs:14:15 + | +LL | type Assert + | ------ required by a bound in this associated type +LL | where +LL | Self: Sized; + | ^^^^^ required by this bound in `Bad::Assert` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` +help: consider relaxing the implicit `Sized` restriction + | +LL | type Assert: ?Sized + | ++++++++ + +error: aborting due to 2 previous errors + +For more information about this error, try `rustc --explain E0277`. diff --git a/tests/ui/traits/trivial-unsized-projection-2.rs b/tests/ui/traits/trivial-unsized-projection-2.rs new file mode 100644 index 00000000000..af4e12f6f90 --- /dev/null +++ b/tests/ui/traits/trivial-unsized-projection-2.rs @@ -0,0 +1,34 @@ +//@ revisions: good bad good_new bad_new +//@[good_new] compile-flags: -Znext-solver +//@[bad_new] compile-flags: -Znext-solver +//@ ignore-compare-mode-next-solver (explicit revisions) +//@[good] check-pass +//@[good_new] check-pass + +#![feature(trivial_bounds)] +#![allow(trivial_bounds)] + +trait Bad { + type Assert + where + Self: Sized; +} + +struct Tail([()]); + +impl Bad for Tail {} + +#[cfg(any(bad, bad_new))] +const FOO: <Tail as Bad>::Assert = todo!(); +//[bad]~^ ERROR the size for values of type `[()]` cannot be known at compilation time +//[bad]~| ERROR the size for values of type `[()]` cannot be known at compilation time +//[bad_new]~^^^ ERROR the size for values of type `[()]` cannot be known at compilation time +//[bad_new]~| ERROR the size for values of type `[()]` cannot be known at compilation time + +#[cfg(any(good, good_new))] +// Well-formed in trivially false param-env +fn foo() where Tail: Sized { + let _: <Tail as Bad>::Assert; +} + +fn main() {} diff --git a/tests/ui/traits/trivial-unsized-projection-in-coherence.rs b/tests/ui/traits/trivial-unsized-projection-in-coherence.rs new file mode 100644 index 00000000000..4407d544b4e --- /dev/null +++ b/tests/ui/traits/trivial-unsized-projection-in-coherence.rs @@ -0,0 +1,45 @@ +// Make sure we don't treat missing associated items as rigid +// during coherence, even if we know they've got an impossible +// `Sized`-bound. As we check whether the self type is definitely +// not `Sized` outside of coherence, this check can be incomplete. +// +// In this test we only use `impl<T> Overlap<u32> for T` to normalize +// the field of `MaybeUnsized<T, u32>` when checking whether it's +// definitely not `Sized`. However, for `MaybeUnsized<u32, u32>` we +// could also use `impl<U> Overlap<U> for u32` for normalization, which +// would result in a `Sized` type. cc #139000 + +struct MaybeUnsized<T: Overlap<U>, U>(<T as Overlap<U>>::MaybeUnsized); + +trait ReqSized { + type Missing1 + where + Self: Sized; + type Missing2 + where + Self: Sized; +} +impl<T> ReqSized for MaybeUnsized<T, u32> {} + +struct W<T: ?Sized>(T); +trait Eq<T> {} +impl<T> Eq<T> for W<T> {} + +trait RelateReqSized {} +impl<T: ReqSized> RelateReqSized for T where W<T::Missing1>: Eq<T::Missing2> {} + +trait Overlap<U> { + type MaybeUnsized: ?Sized; +} +impl<T> Overlap<u32> for T { + type MaybeUnsized = str; +} +impl<U> Overlap<U> for u32 +//~^ ERROR conflicting implementations of trait `Overlap<u32>` for type `u32` +where + MaybeUnsized<U, u32>: RelateReqSized, +{ + type MaybeUnsized = u32; +} + +fn main() {} diff --git a/tests/ui/traits/trivial-unsized-projection-in-coherence.stderr b/tests/ui/traits/trivial-unsized-projection-in-coherence.stderr new file mode 100644 index 00000000000..52fca9479ca --- /dev/null +++ b/tests/ui/traits/trivial-unsized-projection-in-coherence.stderr @@ -0,0 +1,15 @@ +error[E0119]: conflicting implementations of trait `Overlap<u32>` for type `u32` + --> $DIR/trivial-unsized-projection-in-coherence.rs:37:1 + | +LL | impl<T> Overlap<u32> for T { + | -------------------------- first implementation here +... +LL | / impl<U> Overlap<U> for u32 +LL | | +LL | | where +LL | | MaybeUnsized<U, u32>: RelateReqSized, + | |_________________________________________^ conflicting implementation for `u32` + +error: aborting due to 1 previous error + +For more information about this error, try `rustc --explain E0119`. diff --git a/tests/ui/traits/trivial-unsized-projection.bad.stderr b/tests/ui/traits/trivial-unsized-projection.bad.stderr new file mode 100644 index 00000000000..4aea63329b3 --- /dev/null +++ b/tests/ui/traits/trivial-unsized-projection.bad.stderr @@ -0,0 +1,44 @@ +error[E0277]: the size for values of type `[()]` cannot be known at compilation time + --> $DIR/trivial-unsized-projection.rs:20:12 + | +LL | const FOO: <[()] as Bad>::Assert = todo!(); + | ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: the trait `Sized` is not implemented for `[()]` +note: required by a bound in `Bad::Assert` + --> $DIR/trivial-unsized-projection.rs:14:15 + | +LL | type Assert + | ------ required by a bound in this associated type +LL | where +LL | Self: Sized; + | ^^^^^ required by this bound in `Bad::Assert` +help: consider relaxing the implicit `Sized` restriction + | +LL | type Assert: ?Sized + | ++++++++ + +error[E0277]: the size for values of type `[()]` cannot be known at compilation time + --> $DIR/trivial-unsized-projection.rs:20:12 + | +LL | const FOO: <[()] as Bad>::Assert = todo!(); + | ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: the trait `Sized` is not implemented for `[()]` +note: required by a bound in `Bad::Assert` + --> $DIR/trivial-unsized-projection.rs:14:15 + | +LL | type Assert + | ------ required by a bound in this associated type +LL | where +LL | Self: Sized; + | ^^^^^ required by this bound in `Bad::Assert` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` +help: consider relaxing the implicit `Sized` restriction + | +LL | type Assert: ?Sized + | ++++++++ + +error: aborting due to 2 previous errors + +For more information about this error, try `rustc --explain E0277`. diff --git a/tests/ui/traits/trivial-unsized-projection.bad_new.stderr b/tests/ui/traits/trivial-unsized-projection.bad_new.stderr new file mode 100644 index 00000000000..4aea63329b3 --- /dev/null +++ b/tests/ui/traits/trivial-unsized-projection.bad_new.stderr @@ -0,0 +1,44 @@ +error[E0277]: the size for values of type `[()]` cannot be known at compilation time + --> $DIR/trivial-unsized-projection.rs:20:12 + | +LL | const FOO: <[()] as Bad>::Assert = todo!(); + | ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: the trait `Sized` is not implemented for `[()]` +note: required by a bound in `Bad::Assert` + --> $DIR/trivial-unsized-projection.rs:14:15 + | +LL | type Assert + | ------ required by a bound in this associated type +LL | where +LL | Self: Sized; + | ^^^^^ required by this bound in `Bad::Assert` +help: consider relaxing the implicit `Sized` restriction + | +LL | type Assert: ?Sized + | ++++++++ + +error[E0277]: the size for values of type `[()]` cannot be known at compilation time + --> $DIR/trivial-unsized-projection.rs:20:12 + | +LL | const FOO: <[()] as Bad>::Assert = todo!(); + | ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: the trait `Sized` is not implemented for `[()]` +note: required by a bound in `Bad::Assert` + --> $DIR/trivial-unsized-projection.rs:14:15 + | +LL | type Assert + | ------ required by a bound in this associated type +LL | where +LL | Self: Sized; + | ^^^^^ required by this bound in `Bad::Assert` + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` +help: consider relaxing the implicit `Sized` restriction + | +LL | type Assert: ?Sized + | ++++++++ + +error: aborting due to 2 previous errors + +For more information about this error, try `rustc --explain E0277`. diff --git a/tests/ui/traits/trivial-unsized-projection.rs b/tests/ui/traits/trivial-unsized-projection.rs new file mode 100644 index 00000000000..62ff25fb7ac --- /dev/null +++ b/tests/ui/traits/trivial-unsized-projection.rs @@ -0,0 +1,32 @@ +//@ revisions: good bad good_new bad_new +//@[good_new] compile-flags: -Znext-solver +//@[bad_new] compile-flags: -Znext-solver +//@ ignore-compare-mode-next-solver (explicit revisions) +//@[good] check-pass +//@[good_new] check-pass + +#![feature(trivial_bounds)] +#![allow(trivial_bounds)] + +trait Bad { + type Assert + where + Self: Sized; +} + +impl Bad for [()] {} + +#[cfg(any(bad, bad_new))] +const FOO: <[()] as Bad>::Assert = todo!(); +//[bad]~^ ERROR the size for values of type `[()]` cannot be known at compilation time +//[bad]~| ERROR the size for values of type `[()]` cannot be known at compilation time +//[bad_new]~^^^ ERROR the size for values of type `[()]` cannot be known at compilation time +//[bad_new]~| ERROR the size for values of type `[()]` cannot be known at compilation time + +#[cfg(any(good, good_new))] +// Well-formed in trivially false param-env +fn foo() where [()]: Sized { + let _: <[()] as Bad>::Assert; +} + +fn main() {} |