ref: c0021447e97c23fc7f846ad9226f3d9f2b5068c8 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; }