ref: 91fed4f458eac3d6b7cc9c02042a4c670d037ede dir: /tests/error/0018-voidparam.c/
int a(void, int i) { return 0; } int b(int i, void) { return 0; } int c(void, void) { return 0; } int d(void, ...) { return 0; } int main() { return 0; }