diff options
| -rw-r--r-- | compiler/rustc_middle/src/query/mod.rs | 2 | ||||
| -rw-r--r-- | compiler/rustc_mir_build/src/build/mod.rs | 4 | ||||
| -rw-r--r-- | compiler/rustc_mir_build/src/thir/pattern/check_match.rs | 25 | ||||
| -rw-r--r-- | tests/ui/closures/2229_closure_analysis/bad-pattern.rs | 23 | ||||
| -rw-r--r-- | tests/ui/closures/2229_closure_analysis/bad-pattern.stderr | 113 |
5 files changed, 154 insertions, 13 deletions
diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs index 6443c30e822..ded5c6aa3b3 100644 --- a/compiler/rustc_middle/src/query/mod.rs +++ b/compiler/rustc_middle/src/query/mod.rs @@ -1022,7 +1022,7 @@ rustc_queries! { desc { "converting literal to mir constant" } } - query check_match(key: LocalDefId) { + query check_match(key: LocalDefId) -> Result<(), rustc_errors::ErrorGuaranteed> { desc { |tcx| "match-checking `{}`", tcx.def_path_str(key) } cache_on_disk_if { true } } diff --git a/compiler/rustc_mir_build/src/build/mod.rs b/compiler/rustc_mir_build/src/build/mod.rs index 3f006765a71..20d381eddb1 100644 --- a/compiler/rustc_mir_build/src/build/mod.rs +++ b/compiler/rustc_mir_build/src/build/mod.rs @@ -42,7 +42,9 @@ fn mir_build(tcx: TyCtxt<'_>, def: LocalDefId) -> Body<'_> { // Ensure unsafeck and abstract const building is ran before we steal the THIR. tcx.ensure_with_value().thir_check_unsafety(def); tcx.ensure_with_value().thir_abstract_const(def); - tcx.ensure_with_value().check_match(def); + if let Err(e) = tcx.check_match(def) { + return construct_error(tcx, def, e); + } let body = match tcx.thir_body(def) { Err(error_reported) => construct_error(tcx, def, error_reported), diff --git a/compiler/rustc_mir_build/src/thir/pattern/check_match.rs b/compiler/rustc_mir_build/src/thir/pattern/check_match.rs index 2b52d70af2a..c3517912cf9 100644 --- a/compiler/rustc_mir_build/src/thir/pattern/check_match.rs +++ b/compiler/rustc_mir_build/src/thir/pattern/check_match.rs @@ -26,8 +26,8 @@ use rustc_session::Session; use rustc_span::hygiene::DesugaringKind; use rustc_span::Span; -pub(crate) fn check_match(tcx: TyCtxt<'_>, def_id: LocalDefId) { - let Ok((thir, expr)) = tcx.thir_body(def_id) else { return }; +pub(crate) fn check_match(tcx: TyCtxt<'_>, def_id: LocalDefId) -> Result<(), ErrorGuaranteed> { + let (thir, expr) = tcx.thir_body(def_id)?; let thir = thir.borrow(); let pattern_arena = TypedArena::default(); let mut visitor = MatchVisitor { @@ -37,13 +37,16 @@ pub(crate) fn check_match(tcx: TyCtxt<'_>, def_id: LocalDefId) { lint_level: tcx.hir().local_def_id_to_hir_id(def_id), let_source: LetSource::None, pattern_arena: &pattern_arena, + error: Ok(()), }; visitor.visit_expr(&thir[expr]); + for param in thir.params.iter() { if let Some(box ref pattern) = param.pat { visitor.check_irrefutable(pattern, "function argument", None); } } + visitor.error } fn create_e0004( @@ -77,6 +80,7 @@ struct MatchVisitor<'a, 'p, 'tcx> { lint_level: HirId, let_source: LetSource, pattern_arena: &'p TypedArena<DeconstructedPat<'p, 'tcx>>, + error: Result<(), ErrorGuaranteed>, } impl<'a, 'tcx> Visitor<'a, 'tcx> for MatchVisitor<'a, '_, 'tcx> { @@ -276,9 +280,9 @@ impl<'p, 'tcx> MatchVisitor<'_, 'p, 'tcx> { let [pat_field] = &subpatterns[..] else { bug!() }; self.check_irrefutable(&pat_field.pattern, "`for` loop binding", None); } else { - non_exhaustive_match( + self.error = Err(non_exhaustive_match( &cx, self.thir, scrut_ty, scrut.span, witnesses, arms, expr_span, - ); + )); } } } @@ -409,7 +413,7 @@ impl<'p, 'tcx> MatchVisitor<'_, 'p, 'tcx> { } #[instrument(level = "trace", skip(self))] - fn check_irrefutable(&self, pat: &Pat<'tcx>, origin: &str, sp: Option<Span>) { + fn check_irrefutable(&mut self, pat: &Pat<'tcx>, origin: &str, sp: Option<Span>) { let mut cx = self.new_cx(self.lint_level, false); let pattern = self.lower_pattern(&mut cx, pat); @@ -478,7 +482,7 @@ impl<'p, 'tcx> MatchVisitor<'_, 'p, 'tcx> { AdtDefinedHere { adt_def_span, ty, variants } }; - self.tcx.sess.emit_err(PatternNotCovered { + self.error = Err(self.tcx.sess.emit_err(PatternNotCovered { span: pat.span, origin, uncovered: Uncovered::new(pat.span, &cx, witnesses), @@ -489,7 +493,7 @@ impl<'p, 'tcx> MatchVisitor<'_, 'p, 'tcx> { let_suggestion, misc_suggestion, adt_defined_here, - }); + })); } } @@ -631,7 +635,7 @@ fn non_exhaustive_match<'p, 'tcx>( witnesses: Vec<DeconstructedPat<'p, 'tcx>>, arms: &[ArmId], expr_span: Span, -) { +) -> ErrorGuaranteed { let is_empty_match = arms.is_empty(); let non_empty_enum = match scrut_ty.kind() { ty::Adt(def, _) => def.is_enum() && !def.variants().is_empty(), @@ -643,13 +647,12 @@ fn non_exhaustive_match<'p, 'tcx>( let pattern; let patterns_len; if is_empty_match && !non_empty_enum { - cx.tcx.sess.emit_err(NonExhaustivePatternsTypeNotEmpty { + return cx.tcx.sess.emit_err(NonExhaustivePatternsTypeNotEmpty { cx, expr_span, span: sp, ty: scrut_ty, }); - return; } else { // FIXME: migration of this diagnostic will require list support let joined_patterns = joined_uncovered_patterns(cx, &witnesses); @@ -800,7 +803,7 @@ fn non_exhaustive_match<'p, 'tcx>( } else { err.help(&msg); } - err.emit(); + err.emit() } pub(crate) fn joined_uncovered_patterns<'p, 'tcx>( diff --git a/tests/ui/closures/2229_closure_analysis/bad-pattern.rs b/tests/ui/closures/2229_closure_analysis/bad-pattern.rs new file mode 100644 index 00000000000..a7bf9b67d45 --- /dev/null +++ b/tests/ui/closures/2229_closure_analysis/bad-pattern.rs @@ -0,0 +1,23 @@ +// regression test for #108683 +// edition:2021 + +enum Refutable { + A, + B, +} + +fn example(v1: u32, v2: [u32; 4], v3: Refutable) { + const PAT: u32 = 0; + let v4 = &v2[..]; + || { + let 0 = v1; //~ ERROR refutable pattern in local binding + let (0 | 1) = v1; //~ ERROR refutable pattern in local binding + let 1.. = v1; //~ ERROR refutable pattern in local binding + let [0, 0, 0, 0] = v2; //~ ERROR refutable pattern in local binding + let [0] = v4; //~ ERROR refutable pattern in local binding + let Refutable::A = v3; //~ ERROR refutable pattern in local binding + let PAT = v1; //~ ERROR refutable pattern in local binding + }; +} + +fn main() {} diff --git a/tests/ui/closures/2229_closure_analysis/bad-pattern.stderr b/tests/ui/closures/2229_closure_analysis/bad-pattern.stderr new file mode 100644 index 00000000000..ca8c2a16d32 --- /dev/null +++ b/tests/ui/closures/2229_closure_analysis/bad-pattern.stderr @@ -0,0 +1,113 @@ +error[E0005]: refutable pattern in local binding + --> $DIR/bad-pattern.rs:13:13 + | +LL | let 0 = v1; + | ^ pattern `1_u32..=u32::MAX` not covered + | + = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant + = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html + = note: the matched value is of type `u32` +help: you might want to use `if let` to ignore the variant that isn't matched + | +LL | if let 0 = v1 { todo!() }; + | ++ +++++++++++ +help: alternatively, you could prepend the pattern with an underscore to define a new named variable; identifiers cannot begin with digits + | +LL | let _0 = v1; + | + + +error[E0005]: refutable pattern in local binding + --> $DIR/bad-pattern.rs:14:14 + | +LL | let (0 | 1) = v1; + | ^^^^^ pattern `2_u32..=u32::MAX` not covered + | + = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant + = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html + = note: the matched value is of type `u32` +help: you might want to use `if let` to ignore the variant that isn't matched + | +LL | if let (0 | 1) = v1 { todo!() }; + | ++ +++++++++++ + +error[E0005]: refutable pattern in local binding + --> $DIR/bad-pattern.rs:15:13 + | +LL | let 1.. = v1; + | ^^^ pattern `0_u32` not covered + | + = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant + = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html + = note: the matched value is of type `u32` +help: you might want to use `if let` to ignore the variant that isn't matched + | +LL | if let 1.. = v1 { todo!() }; + | ++ +++++++++++ + +error[E0005]: refutable pattern in local binding + --> $DIR/bad-pattern.rs:16:13 + | +LL | let [0, 0, 0, 0] = v2; + | ^^^^^^^^^^^^ pattern `[1_u32..=u32::MAX, _, _, _]` not covered + | + = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant + = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html + = note: the matched value is of type `[u32; 4]` +help: you might want to use `if let` to ignore the variant that isn't matched + | +LL | if let [0, 0, 0, 0] = v2 { todo!() }; + | ++ +++++++++++ + +error[E0005]: refutable pattern in local binding + --> $DIR/bad-pattern.rs:17:13 + | +LL | let [0] = v4; + | ^^^ patterns `&[]` and `&[_, _, ..]` not covered + | + = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant + = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html + = note: the matched value is of type `&[u32]` +help: you might want to use `if let` to ignore the variants that aren't matched + | +LL | if let [0] = v4 { todo!() }; + | ++ +++++++++++ + +error[E0005]: refutable pattern in local binding + --> $DIR/bad-pattern.rs:18:13 + | +LL | let Refutable::A = v3; + | ^^^^^^^^^^^^ pattern `Refutable::B` not covered + | + = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant + = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html +note: `Refutable` defined here + --> $DIR/bad-pattern.rs:4:6 + | +LL | enum Refutable { + | ^^^^^^^^^ +LL | A, +LL | B, + | - not covered + = note: the matched value is of type `Refutable` +help: you might want to use `if let` to ignore the variant that isn't matched + | +LL | if let Refutable::A = v3 { todo!() }; + | ++ +++++++++++ + +error[E0005]: refutable pattern in local binding + --> $DIR/bad-pattern.rs:19:13 + | +LL | let PAT = v1; + | ^^^ + | | + | pattern `1_u32..=u32::MAX` not covered + | missing patterns are not covered because `PAT` is interpreted as a constant pattern, not a new variable + | help: introduce a variable instead: `PAT_var` + | + = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant + = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html + = note: the matched value is of type `u32` + +error: aborting due to 7 previous errors + +For more information about this error, try `rustc --explain E0005`. |