|
The following test crashes the server:
--source include/have_innodb.inc
|
--let $restart_parameters= --innodb-force-recovery=5
|
--source include/restart_mysqld.inc
|
SHOW ENGINE INNODB STATUS;
|
In innodb_force_recovery=5 mode, no undo logs will be parsed, and purge_sys will not be initialized. The fix is simple:
--- a/storage/innobase/lock/lock0lock.cc
|
+++ b/storage/innobase/lock/lock0lock.cc
|
@@ -4689,7 +4689,8 @@ struct lock_print_info
|
void operator()(const trx_t* trx) const
|
{
|
ut_ad(mutex_own(&trx_sys.mutex));
|
- if (trx == purge_sys.query->trx)
|
+ if (UNIV_LIKELY(purge_sys.query != NULL) &&
|
+ UNIV_UNLIKELY(trx == purge_sys.query->trx))
|
return;
|
lock_trx_print_wait_and_mvcc_state(file, trx, now);
|
|
The crash was introduced by the merge of MDEV-18429 from 10.2. 10.2 itself is not affected.
|