bjoernager/rust
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panic when trying to destructure union as enum

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Smitty 2021-07-09 15:22:12 -04:00
parent df3e003378
commit b86ed4a425
1 changed files with 2 additions and 2 deletions
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4
compiler/rustc_mir_build/src/check_unsafety.rs
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@ -201,14 +201,14 @@ impl<'a, 'tcx> Visitor<'a, 'tcx> for UnsafetyVisitor<'a, 'tcx> {
AscribeUserType { .. } | AscribeUserType { .. } |
// creating a union literal // creating a union literal
Constant { .. } => {}, Constant { .. } => {},
Variant { .. } | Leaf { .. } | Or { .. } => { Leaf { .. } | Or { .. } => {
// pattern matching with a union and not doing something like v = Union { bar: 5 } // pattern matching with a union and not doing something like v = Union { bar: 5 }
self.in_union_destructure = true; self.in_union_destructure = true;
visit::walk_pat(self, pat); visit::walk_pat(self, pat);
self.in_union_destructure = false; self.in_union_destructure = false;
return; // don't walk pattern return; // don't walk pattern
} }
Deref { .. } | Range { .. } | Slice { .. } | Array { .. } => Variant { .. } | Deref { .. } | Range { .. } | Slice { .. } | Array { .. } =>
unreachable!("impossible union destructuring type"), unreachable!("impossible union destructuring type"),
} }
} }