uniform half4 colorGreen;

void d(inout int) {}

void c(out int i) {
    // This expression is void-typed, because comma expressions take their type from the RHS.
    12345, d(i);
}

void a(int i) {
    c(i);
}

half4 main(float2) {
    int i;
    a(i);
    return colorGreen;
}