Using libc's implementation of case-insensitive string comparison (str[n][case]cmp)
	is possible to have the segmentation violation because NULL pointers aren't checked
	and *p++ is used blindly. Any occasional call to these functions with one of string
	pointers is equal to NULL may catch signal 11 and cause program to die.

Fix: Apply patch below, rebuild and reinstall libc. Don't use
	str[n][case]cmp from libc until it's fixed unless you want your
	projects to die unexpectedly.
How-To-Repeat: 
	create the simplest test:

#include <string.h>

int main() {

	char *s1 = NULL, *s2 = NULL;

	return strcmp(s1, s2);
}

	> gcc -o test test.c
	> ./test
	Segmentation fault (core dumped)