SKIP: FAILED

#include <metal_stdlib>
using namespace metal;

thread uint x_1 = 0u;
void main_1() {
  uint const x_2 = x_1;
}
fragment void tint_symbol(uint x_1_param [[sample_id]]) {
  x_1 = x_1_param;
  main_1();
}
program_source:4:13: error: program scope variable must reside in constant address space
thread uint x_1 = 0u;
            ^
program_source:6:14: warning: unused variable 'x_2' [-Wunused-variable]
  uint const x_2 = x_1;
             ^