diff options
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_mir_build/src/thir/pattern/check_match.rs | 4 |
1 files changed, 4 insertions, 0 deletions
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 38f425581c1..95799cec94b 100644 --- a/compiler/rustc_mir_build/src/thir/pattern/check_match.rs +++ b/compiler/rustc_mir_build/src/thir/pattern/check_match.rs @@ -1019,6 +1019,10 @@ fn report_non_exhaustive_match<'p, 'tcx>( err.note("`&str` cannot be matched exhaustively, so a wildcard `_` is necessary"); } else if cx.is_foreign_non_exhaustive_enum(ty) { err.note(format!("`{ty}` is marked as non-exhaustive, so a wildcard `_` is necessary to match exhaustively")); + } else if cx.is_uninhabited(ty.inner()) && cx.tcx.features().min_exhaustive_patterns { + // The type is uninhabited yet there is a witness: we must be in the `MaybeInvalid` + // case. + err.note(format!("`{ty}` is uninhabited but is not being matched by value, so a wildcard `_` is required")); } } } |