Working with function pointers is always finicky. I once had MSVC fold together

    int f0(int x) { return x; }

    int f1(int x, int y) { return y; }

into a single function, so at runtime, (void(*)())f0 and (void(*)())f1 would compare equal. AFAIK, you are not guaranteed by the standard that functions of different signatures would, when their addresses are taken, result in different pointers, so it's not technically a bug... but it's quite surprising, and ruins certain tricks.