MDEV-6580 Assertion `thd' failed in my_malloc_size_cb_func upon writing status...

MDEV-6580 Assertion `thd' failed in my_malloc_size_cb_func upon writing status report into error log

thd is NULL in the signal handler, display_table_locks() should expect that

mysql-test/r/sighup-6580.result

+select 'ok';
+ok
+ok

mysql-test/t/sighup-6580.test

+#
+# MDEV-6580 Assertion `thd' failed in my_malloc_size_cb_func upon writing status report into error log
+#
+source include/not_windows.inc;
+source include/not_embedded.inc;
+let $pid=`select @@pid_file`;
+exec kill -1 `cat $pid`;
+
+select 'ok';
+

sql/sql_test.cc

@@ -468,8 +468,7 @@ static void display_table_locks(void)
   DYNAMIC_ARRAY saved_table_locks;
 
   (void) my_init_dynamic_array(&saved_table_locks,sizeof(TABLE_LOCK_INFO),
-                               tc_records() + 20, 50,
-                               MYF(MY_THREAD_SPECIFIC));
+                               tc_records() + 20, 50, MYF(0));
   mysql_mutex_lock(&THR_LOCK_lock);
   for (list= thr_lock_thread_list; list; list= list_rest(list))
   {