MDEV-10792: Assertion `thd->mdl_context.is_lock_owner ..

.. (MDL_key::TABLE, table->db, table->table_name, MDL_SHARED)'
failed in mysql_rm_table_no_locks

Reset error flag after temporary table has been
successfully dropped.

mysql-test/r/temp_table.result

@@ -538,5 +538,13 @@ UNLOCK TABLES;
 ALTER TABLE t1 RENAME t2, LOCK SHARED;
 ALTER TABLE t2 RENAME t1, LOCK EXCLUSIVE;
 DROP TABLE t1;
+#
+# MDEV-10792: Assertion `thd->mdl_context.is_lock_owner
+# (MDL_key::TABLE, table->db, table->table_name, MDL_SHARED)'
+# failed in mysql_rm_table_no_locks
+#
+CREATE TEMPORARY TABLE t1 (i INT);
+DROP TABLE nonexisting_table, t1;
+ERROR 42S02: Unknown table 'temp_db.nonexisting_table'
 # Cleanup
 DROP DATABASE temp_db;

mysql-test/t/temp_table.test

@@ -583,6 +583,15 @@ ALTER TABLE t2 RENAME t1, LOCK EXCLUSIVE;
 
 DROP TABLE t1;
 
+--echo #
+--echo # MDEV-10792: Assertion `thd->mdl_context.is_lock_owner
+--echo # (MDL_key::TABLE, table->db, table->table_name, MDL_SHARED)'
+--echo # failed in mysql_rm_table_no_locks
+--echo #
+CREATE TEMPORARY TABLE t1 (i INT);
+--error ER_BAD_TABLE_ERROR
+DROP TABLE nonexisting_table, t1;
+
 --echo # Cleanup
 DROP DATABASE temp_db;
 

sql/sql_table.cc

@@ -2299,6 +2299,7 @@ int mysql_rm_table_no_locks(THD *thd, TABLE_LIST *tables, bool if_exists,
         error= 1;
         goto err;
       }
+      error= 0;
       table->table= 0;
     }