1 files changed, 25 insertions, 1 deletions
diff --git a/mysql-test/suite/innodb/t/innodb-lock.test b/mysql-test/suite/innodb/t/innodb-lock.test
index f73bf0d5a99..d17d73991aa 100644
--- a/mysql-test/suite/innodb/t/innodb-lock.test
+++ b/mysql-test/suite/innodb/t/innodb-lock.test
@@ -401,4 +401,28 @@ drop table t1;
 
 # TODO (MDEV-10962): H) Insert into an already passed locked gap (15)
 
-
+--echo #
+--echo # MDEV-10962 Deadlock with 3 concurrent DELETEs by unique key
+--echo #
+create table t1 (a int unique) engine innodb;
+insert into t1 values (1);
+connect (con1, localhost, root,, test);
+connect (con2, localhost, root,, test);
+connect (con3, localhost, root,, test);
+connection con1;
+send delete from t1 where a = 1;
+connection con2;
+send delete from t1 where a = 1;
+connection con3;
+send delete from t1 where a = 1;
+connection con1;
+reap;
+connection con2;
+reap;
+connection con3;
+reap;
+connection default;
+disconnect con1;
+disconnect con2;
+disconnect con3;
+drop table t1;