SKIP: FAILED

#include <metal_stdlib>
using namespace metal;
struct FBF {
  float4 c1;
  int4 c3;
};

void g(float a, float b, int c) {
}
fragment void f(float4 pos [[position]], FBF fbf) {
  g(fbf.c1[0u], pos[1u], fbf.c3[2u]);
}
program_source:10:42: error: invalid type 'FBF' for input declaration in a fragment function
fragment void f(float4 pos [[position]], FBF fbf) {
                                         ^~~~~~~
program_source:4:10: note: 'color' attribute must be made explicit
  float4 c1;
         ^
program_source:5:8: note: 'color' attribute must be made explicit
  int4 c3;
       ^