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-rw-r--r--storage/myisam/mi_locking.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/storage/myisam/mi_locking.c b/storage/myisam/mi_locking.c
index d2c74cf9980..b348429fd3c 100644
--- a/storage/myisam/mi_locking.c
+++ b/storage/myisam/mi_locking.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
+/* Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Copyright (c) 2009, 2018, MariaDB Corporation
This program is free software; you can redistribute it and/or modify
@@ -236,6 +236,10 @@ int mi_lock_database(MI_INFO *info, int lock_type)
info->invalidator=info->s->invalidator;
share->w_locks++;
share->tot_locks++;
+
+ DBUG_EXECUTE_IF("simulate_incorrect_share_wlock_value",
+ DEBUG_SYNC_C("after_share_wlock_increment"););
+
info->s->in_use= list_add(info->s->in_use, &info->in_use);
break;
default: