-// RUN: %clangxx -fsanitize=unreachable %s -O3 -o %t && %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx -fsanitize=unreachable %s -O3 -o %t && not %run %t 2>&1 | FileCheck %s
int main(int, char **argv) {
// CHECK: unreachable.cpp:5:3: runtime error: execution reached a __builtin_unreachable() call