@@ -262,6 +262,11 @@ inline static int un_escape(str *user, str *new_user )

  	int i, j, value;

 	int hi, lo;

+	if( new_user==0 || new_user->s==0) {

+		LOG(L_CRIT, "BUG: un_escape: called with invalid param\n");

+		return -1;

+	}

+

 	new_user->len = 0;

 	j = 0;