[clang] [Clang] Reland: Diagnose invalid function types in dependent contexts (PR #139246)

[via cfe-commits]

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@@ -33,7 +33,7 @@ T f1(T t1, U u1, int i1, T** tpp)
   i1 = t1[u1];
   i1 *= t1;
 
-  i1(u1, t1); // expected-error {{called object type 'int' is not a function or function pointer}}
+  i1(u1, t1);
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cor3ntin wrote:

It is because that function is not instantiated

https://github.com/llvm/llvm-project/pull/139246