1 files changed, 26 insertions, 0 deletions
diff --git a/mysql-test/t/uniques_crash-7912.test b/mysql-test/t/uniques_crash-7912.test
new file mode 100644
index 00000000000..8dc82f8f540
--- /dev/null
+++ b/mysql-test/t/uniques_crash-7912.test
@@ -0,0 +1,26 @@
+#
+# MDEV-7912
+#
+# multitable delete with wrongly set sort_buffer_size crashes in merge_buffers
+
+--source include/have_innodb.inc
+--source include/have_debug.inc
+--source include/windows.inc
+
+call mtr.add_suppression("Out of memory");
+
+set sql_mode="";
+--disable_warnings
+drop table if exists t1,t2;
+create table `t1` (`a` datetime not null) engine=InnoDB;
+create table `t2` (`a` int not null) engine=innodb;
+replace into t1 values (),();
+insert into t2 values(0);
+set session sort_buffer_size = 1024*1024*1024*1024;
+#Either fail with EE_OUTOFMEMORY, or succeed
+--error 0 , 5
+delete d2 from t2 as d1, t1 as d2 where d1.a <=> d2.a;
+--enable_warnings
+
+drop table t2;
+drop table t1;