// RUN: %clang %s -o %t && %run %t 2>&1
// There's no interceptor for strcasestr on Windows
// XFAIL: win32
#define _GNU_SOURCE
#include <assert.h>
#include <string.h>
int main(int argc, char **argv) {
char *r = 0;
char s1[] = "aB";
char s2[] = "b";
r = strcasestr(s1, s2);
assert(r == s1 + 1);
return 0;
}