SKIP: FAILED

#include <metal_stdlib>
using namespace metal;

thread half t = 0.0h;
half4 m() {
  t = 1.0h;
  return half4(t);
}
void f() {
  float4 v = float4(m());
}
program_source:4:13: error: program scope variable must reside in constant address space
thread half t = 0.0h;
            ^
program_source:10:10: warning: unused variable 'v' [-Wunused-variable]
  float4 v = float4(m());
         ^