SKIP: FAILED

#include <metal_stdlib>
using namespace metal;

thread uint3 x_1 = 0u;
void main_1() {
  uint3 const x_2 = x_1;
}
kernel void tint_symbol(uint3 x_1_param [[thread_position_in_grid]]) {
  x_1 = x_1_param;
  main_1();
}
program_source:4:14: error: program scope variable must reside in constant address space
thread uint3 x_1 = 0u;
             ^
program_source:6:15: warning: unused variable 'x_2' [-Wunused-variable]
  uint3 const x_2 = x_1;
              ^