``` const char *err = strchr(cp, ':')+2; tor_assert(err); The assert would never work. Even if the function strchr returns NULL, then the pointer err will store an invalid value ((char *)2), but it won't be NULL. It would be correct to write the following: const char *err = strchr(cp, ':'); tor_assert(err); err += 2; However, as I understand, the function strchr will never return NULL, and the check is written just in case. ``` Reported by Andrey Karpov https://www.viva64.com/en/b/0507/