Merge branch '10.0' into merge-wip

1 files changed, 4 insertions, 0 deletions

diff --git a/sql/rpl_rli.h b/sql/rpl_rli.h
index d8a30e75724..96db33206d9 100644
--- a/sql/rpl_rli.h
+++ b/sql/rpl_rli.h
@@ -561,6 +561,10 @@ struct rpl_group_info
     (When we execute in parallel the transactions that group committed
     together on the master, we still need to wait for any prior transactions
     to have reached the commit stage).
+
+    The pointed-to gco is only valid for as long as
+    gtid_sub_id < parallel_entry->last_committed_sub_id. After that, it can
+    be freed by another thread.
   */
   group_commit_orderer *gco;