diff options
3 files changed, 75 insertions, 4 deletions
diff --git a/compiler/rustc_mir_build/src/builder/matches/match_pair.rs b/compiler/rustc_mir_build/src/builder/matches/match_pair.rs index c41538a2817..f2ce0c46dd3 100644 --- a/compiler/rustc_mir_build/src/builder/matches/match_pair.rs +++ b/compiler/rustc_mir_build/src/builder/matches/match_pair.rs @@ -273,10 +273,11 @@ impl<'tcx> MatchPairTree<'tcx> { let irrefutable = adt_def.variants().iter_enumerated().all(|(i, v)| { i == variant_index - || !v - .inhabited_predicate(cx.tcx, adt_def) - .instantiate(cx.tcx, args) - .apply_ignore_module(cx.tcx, cx.infcx.typing_env(cx.param_env)) + || !v.inhabited_predicate(cx.tcx, adt_def).instantiate(cx.tcx, args).apply( + cx.tcx, + cx.infcx.typing_env(cx.param_env), + cx.def_id.into(), + ) }) && !adt_def.variant_list_has_applicable_non_exhaustive(); if irrefutable { None } else { Some(TestCase::Variant { adt_def, variant_index }) } } diff --git a/tests/ui/match/privately-uninhabited-issue-137999.rs b/tests/ui/match/privately-uninhabited-issue-137999.rs new file mode 100644 index 00000000000..918393a0c6a --- /dev/null +++ b/tests/ui/match/privately-uninhabited-issue-137999.rs @@ -0,0 +1,44 @@ +//@ edition:2024 +//@ check-fail + +mod m { + enum Void {} + + pub struct Internal { + _v: Void, + } + + pub enum Test { + A(u32, u32), + B(Internal), + } +} + +use m::Test; + +pub fn f1(x: &mut Test) { + let r1: &mut u32 = match x { + Test::A(a, _) => a, + _ => todo!(), + }; + + let r2: &mut u32 = match x { //~ ERROR cannot use `*x` because it was mutably borrowed + Test::A(_, b) => b, + _ => todo!(), + }; + + let _ = *r1; + let _ = *r2; +} + +pub fn f2(x: &mut Test) { + let r = &mut *x; + match x { //~ ERROR cannot use `*x` because it was mutably borrowed + Test::A(_, _) => {} + _ => {} + } + + let _ = r; +} + +fn main() {} diff --git a/tests/ui/match/privately-uninhabited-issue-137999.stderr b/tests/ui/match/privately-uninhabited-issue-137999.stderr new file mode 100644 index 00000000000..6f74a75375e --- /dev/null +++ b/tests/ui/match/privately-uninhabited-issue-137999.stderr @@ -0,0 +1,26 @@ +error[E0503]: cannot use `*x` because it was mutably borrowed + --> $DIR/privately-uninhabited-issue-137999.rs:25:30 + | +LL | Test::A(a, _) => a, + | - `x.0` is borrowed here +... +LL | let r2: &mut u32 = match x { + | ^ use of borrowed `x.0` +... +LL | let _ = *r1; + | --- borrow later used here + +error[E0503]: cannot use `*x` because it was mutably borrowed + --> $DIR/privately-uninhabited-issue-137999.rs:36:11 + | +LL | let r = &mut *x; + | ------- `*x` is borrowed here +LL | match x { + | ^ use of borrowed `*x` +... +LL | let _ = r; + | - borrow later used here + +error: aborting due to 2 previous errors + +For more information about this error, try `rustc --explain E0503`. |