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fix own_substs ICE

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This commit is contained in:
Takayuki Maeda 2022-10-16 22:24:27 +09:00
parent ee1c3b385b
commit 0b6fa0d418
3 changed files with 44 additions and 5 deletions
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17
compiler/rustc_infer/src/infer/error_reporting/need_type_info.rs
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@ -902,11 +902,18 @@ impl<'a, 'tcx> FindInferSourceVisitor<'a, 'tcx> {
// impl is currently the `DefId` of `Output` in the trait definition
// which makes this somewhat difficult and prevents us from just
// using `self.path_inferred_subst_iter` here.
hir::ExprKind::Struct(&hir::QPath::Resolved(_self_ty, path), _, _) => {
if let Some(ty) = self.opt_node_type(expr.hir_id) {
if let ty::Adt(_, substs) = ty.kind() {
return Box::new(self.resolved_path_inferred_subst_iter(path, substs));
}
hir::ExprKind::Struct(&hir::QPath::Resolved(_self_ty, path), _, _)
// FIXME(TaKO8Ki): Ideally we should support this. For that
// we have to map back from the self type to the
// type alias though. That's difficult.
//
// See the `need_type_info/issue-103053.rs` test for
// a example.
if !matches!(path.res, Res::Def(DefKind::TyAlias, _)) => {
if let Some(ty) = self.opt_node_type(expr.hir_id)
&& let ty::Adt(_, substs) = ty.kind()
{
return Box::new(self.resolved_path_inferred_subst_iter(path, substs));
}
}
hir::ExprKind::MethodCall(segment, ..) => {