1 // RUN: %clangxx_msan -O0 %s -o %t && not %run %t >%t.out 2>&1
2 // FileCheck %s <%t.out
3 // RUN: %clangxx_msan -O0 %s -o %t && MSAN_OPTIONS=poison_in_free=0 %run %t >%t.out 2>&1
4 
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <string.h>
8 
9 int main(int argc, char **argv) {
10   char *volatile x = (char*)malloc(50 * sizeof(char));
11   memset(x, 0, 50);
12   free(x);
13   return x[25];
14   // CHECK: MemorySanitizer: use-of-uninitialized-value
15   // CHECK: #0 {{.*}} in main{{.*}}poison_in_free.cc:[[@LINE-2]]
16 }
17