Should you dereference function pointers?

#include <stdio.h>

void func() {
  printf("hello world\n");
}

void (*go)() = func;

int main() {
  go();    // number 1...
  (*go)(); // or number 2
  return 0;
}

Which is correct ANSI C89? GCC accepts both, even in -ansi -pedantic; it outputs hello world twice.

>>24
At work we wrote our own deque which is contiguous
Am I correct to assume that your pop() works in linear time but you don't even know what that means because you are cool hackers who implement their own super-fast deque with direct element access and can't be bothered with abstract bullshite that makes stl so slow (not that you ever actually compared performance)?