Recently i wrote the following program ...

#include <stdio.h>

int main(int argc,char** argv) {
	int i;

	i = 10;
	printf("%d",i);
	free(&i);

	return 0;
}

The above program is compiled using GCC without errors. When you execute the output program the result in cygwin is:

10     36 [sig] a 1008 open_stackdumpfile: Dumping stack trace to a.exe.stackdump

and in FreeBSD

a.out in free(): warning: junk pointer, too high to make sense

The problem is that free is trying to deallocate a variable that is supposed to be handled by the compiler's generated code. The question is ... should the compiler caught the error? I think after the compilation the error is likely untraceable.