#include <stdio.h>

struct x1 {
	unsigned int	x;
	char		y;
};

struct x2 {
	unsigned int	x;
	unsigned int	y;
};

void pollute(void)
{
	struct x2 x = {
		.x	= ~0,
		.y	= ~0,
	};
}

void test(void)
{
	struct x1 x1 = {
		.x	= 1,
		.y	= 2,
	};
	struct x2 *x2 = (struct x2 *)&x1;

	printf("%u %u\n", x2->x, x2->y);
}

int main(int argc, char **argv)
{
	pollute();
	test();
	return 0;
}