SKIP: FAILED

#include <metal_stdlib>
using namespace metal;

void f(int a) {
  int const a = a;
  int const b = a;
}
program_source:5:13: error: redefinition of 'a' with a different type: 'const int' vs 'int'
  int const a = a;
            ^
program_source:4:12: note: previous definition is here
void f(int a) {
           ^