[llvm-bugs] [Bug 52279] New: Erroneous acceptance of ambiguous conversion of overload template function to function pointer type

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=52279

            Bug ID: 52279
           Summary: Erroneous acceptance of ambiguous conversion of
                    overload template function to function pointer type
           Product: clang
           Version: 12.0
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++2b
          Assignee: unassignedclangbugs at nondot.org
          Reporter: fchelnokov at gmail.com
                CC: blitzrakete at gmail.com, erik.pilkington at gmail.com,
                    llvm-bugs at lists.llvm.org, richard-llvm at metafoo.co.uk

This is code is ill-formed due to ambiguous conversion: 
```
auto f(auto) { return 1; }
int f(auto) { return 2; }

int main() {
    [[maybe_unused]] int(*x)(int) = f;
}
```
it is rejected by GCC, but accepted by Clang. Demo:
https://gcc.godbolt.org/z/oaG1GGxd9

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