SKIP: FAILED

void f() {
  float2x2[2] v = arr;
}

[numthreads(1, 1, 1)]
void unused_entry_point() {
}

DXC validation failure:
hlsl.hlsl:2:16: error: brackets are not allowed here; to declare an array, place the brackets after the name
  float2x2[2] v = arr;
          ~~~  ^
               [2]
hlsl.hlsl:2:19: error: use of undeclared identifier 'arr'
  float2x2[2] v = arr;
                  ^