SKIP: FAILED

#include <metal_stdlib>
using namespace metal;
template<typename T, size_t N>
struct tint_array {
  const constant T& operator[](size_t i) const constant { return elements[i]; }
  device T& operator[](size_t i) device { return elements[i]; }
  const device T& operator[](size_t i) const device { return elements[i]; }
  thread T& operator[](size_t i) thread { return elements[i]; }
  const thread T& operator[](size_t i) const thread { return elements[i]; }
  threadgroup T& operator[](size_t i) threadgroup { return elements[i]; }
  const threadgroup T& operator[](size_t i) const threadgroup { return elements[i]; }
  T elements[N];
};

struct Inner {
  bool b;
  int4 v;
  float3x3 m;
};
struct Outer {
  tint_array<Inner, 4> a;
};

threadgroup Outer v;
Outer foo() {
  threadgroup_barrier(mem_flags::mem_threadgroup);
  Outer const v_1 = v;
  threadgroup_barrier(mem_flags::mem_threadgroup);
  return v_1;
}
program_source:24:19: error: program scope variable must reside in constant address space
threadgroup Outer v;
                  ^