[clang] [clang] Fix crash in concept deprecation (PR #98622)
Matheus Izvekov via cfe-commits
cfe-commits at lists.llvm.org
Wed Jul 17 11:23:17 PDT 2024
================
@@ -6308,11 +6308,11 @@ TypeResult Sema::ActOnTypeName(Declarator &D) {
CheckExtraCXXDefaultArguments(D);
}
- if (const AutoType *AutoT = T->getAs<AutoType>())
- CheckConstrainedAuto(
- AutoT,
- TInfo->getTypeLoc().getContainedAutoTypeLoc().getConceptNameLoc());
-
+ if (const AutoType *AutoT = T->getAs<AutoType>()) {
+ AutoTypeLoc Loc = TInfo->getTypeLoc().getContainedAutoTypeLoc();
+ CheckConstrainedAuto(AutoT,
+ Loc ? Loc.getConceptNameLoc() : SourceLocation());
+ }
----------------
mizvekov wrote:
These still have the same issue, but I don't understand why we need this check here.
We obviously can't write stuff like
```C++
using X = auto;
```
So I am missing in what case undeduced auto can appear here, except the weird deleted function error recovery issue.
https://github.com/llvm/llvm-project/pull/98622
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