Temporary enable IM tests in 5.1-runtime tree.

Enable assert in Thread_registry.

mysql-test/t/disabled.def

@@ -11,14 +11,18 @@
 ##############################################################################
 user_limits     : Bug#23921 random failure of user_limits.test
 
-im_options               : Bug#20294 2006-07-24 stewart   Instance manager test im_options fails randomly
-im_daemon_life_cycle     : Bug#20294 2007-05-14 alik      Instance manager tests fail randomly
-im_cmd_line              : Bug#20294 2007-05-14 alik      Instance manager tests fail randomly
-im_utils                 : Bug#20294 2007-05-30 alik      Instance manager tests fail randomly
-im_instance_conf         : Bug#20294 2007-05-30 alik      Instance manager tests fail randomly
-im_life_cycle            : BUG#27851 Instance manager dies on ASSERT in ~Thread_registry() or from not being able to close a mysqld instance.
-im_instance_conf         : BUG#28743 Instance manager generates warnings in test suite
-im_utils                 : BUG#28743 Instance manager generates warnings in test suite
+#
+# Temporary enable IM tests to catch the assert.
+#
+# im_options               : Bug#20294 2006-07-24 stewart   Instance manager test im_options fails randomly
+# im_daemon_life_cycle     : Bug#20294 2007-05-14 alik      Instance manager tests fail randomly
+# im_cmd_line              : Bug#20294 2007-05-14 alik      Instance manager tests fail randomly
+# im_utils                 : Bug#20294 2007-05-30 alik      Instance manager tests fail randomly
+# im_instance_conf         : Bug#20294 2007-05-30 alik      Instance manager tests fail randomly
+# im_life_cycle            : BUG#27851 Instance manager dies on ASSERT in ~Thread_registry() or from not being able to close a mysqld instance.
+# im_instance_conf         : BUG#28743 Instance manager generates warnings in test suite
+# im_utils                 : BUG#28743 Instance manager generates warnings in test suite
+
 concurrent_innodb        : BUG#21579 2006-08-11 mleich innodb_concurrent random failures with varying differences
 ctype_big5               : BUG#26711 2007-06-21 Lars Test has never worked on Double Whopper
 

server-tools/instance-manager/thread_registry.cc

@@ -67,8 +67,7 @@ Thread_registry::~Thread_registry()
   if (head.next != &head)
     log_error("Not all threads died properly\n");
   /* All threads must unregister */
-  // Disabled assert temporarily - BUG#28030
-  // DBUG_ASSERT(head.next == &head);
+  DBUG_ASSERT(head.next == &head);
 
   pthread_mutex_unlock(&LOCK_thread_registry);
   pthread_cond_destroy(&COND_thread_registry_is_empty);