SKIP: FAILED

#include <metal_stdlib>
using namespace metal;
struct In {
  int4 fbf;
  float4 pos [[position]];
};

void g(int a, float b) {
}
fragment void f(In in) {
  g(in.fbf[3u], in.pos[0u]);
}
program_source:10:17: error: invalid type 'In' for input declaration in a fragment function
fragment void f(In in) {
                ^~~~~
program_source:5:3: note: type 'float4' (vector of 4 'float' values) cannot be used in struct of resources/colors
  float4 pos [[position]];
  ^