[clang] [Clang] Fixed UnresolvedLookupExpr propagating into the codegen phase (PR #124609)

[Younan Zhang via cfe-commits]

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@@ -703,6 +703,48 @@ auto f(auto x) { // cxx14-error {{'auto' not allowed in function prototype}}
   return f(1) + 1;
 }
 
+namespace GH122892 {
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zyn0217 wrote:

I think the test should live in CodeGen/ rather than SemaCXX/, which mostly contains '-fsyntax-only' tests, while the issue arises in the codegen stage?

https://github.com/llvm/llvm-project/pull/124609