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hir_analysis: enums return None in find_field

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Unnamed union fields with enums are checked for, but if `find_field`
causes an ICE then the compiler won't get to that point.

Signed-off-by: David Wood <david@davidtw.co>
This commit is contained in:
David Wood 2024-03-04 11:34:10 +00:00
parent 7606c13961
commit 4e03c51f7d
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3 changed files with 76 additions and 1 deletions
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7
compiler/rustc_hir_analysis/src/collect.rs
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@ -791,7 +791,12 @@ fn convert_enum_variant_types(tcx: TyCtxt<'_>, def_id: DefId) {
}
fn find_field(tcx: TyCtxt<'_>, (def_id, ident): (DefId, Ident)) -> Option<FieldIdx> {
tcx.adt_def(def_id).non_enum_variant().fields.iter_enumerated().find_map(|(idx, field)| {
let adt = tcx.adt_def(def_id);
if adt.is_enum() {
return None;
}
adt.non_enum_variant().fields.iter_enumerated().find_map(|(idx, field)| {
if field.is_unnamed() {
let field_ty = tcx.type_of(field.did).instantiate_identity();
let adt_def = field_ty.ty_adt_def().expect("expect Adt for unnamed field");