Assertion `0' failed in Protocol::end_statement upon multi-table delete with foreign key

--source include/have_innodb.inc

create table t1 (pk int, b int, primary key(pk), foreign key (b) references t1 (pk)) engine=InnoDB;

insert into t1 values (1,1),(2,2);

create table t2 (pk int primary key) engine=InnoDB;

insert into t2 values (3),(4); # Optional, fails either way

delete ignore t1.* from t1 left join t2 on (t1.pk = t2.pk);

drop table t1, t2;

mysqld: /data/src/10.2/sql/protocol.cc:599: void Protocol::end_statement(): Assertion `0' failed.

210302  0:55:09 [ERROR] mysqld got signal 6 ;

#7  0x00007f26b6857f36 in __GI___assert_fail (assertion=0x55e6224af4b0 "0", file=0x55e6224af180 "/data/src/10.2/sql/protocol.cc", line=599, function=0x55e6224af3d0 "void Protocol::end_statement()") at assert.c:101

#8  0x000055e62197ec6b in Protocol::end_statement (this=0x7f2660001348) at /data/src/10.2/sql/protocol.cc:599

#9  0x000055e621a5bfd1 in dispatch_command (command=COM_QUERY, thd=0x7f2660000d90, packet=0x7f2660008b51 "delete ignore t1.* from t1 left join t2 on (t1.pk = t2.pk)", packet_length=58, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:2385

#10 0x000055e621a58fc5 in do_command (thd=0x7f2660000d90) at /data/src/10.2/sql/sql_parse.cc:1381

#11 0x000055e621bb3a26 in do_handle_one_connection (connect=0x55e6243d47e0) at /data/src/10.2/sql/sql_connect.cc:1336

#12 0x000055e621bb378b in handle_one_connection (arg=0x55e6243d47e0) at /data/src/10.2/sql/sql_connect.cc:1241

#13 0x000055e6223dc7c8 in pfs_spawn_thread (arg=0x55e6243b7bd0) at /data/src/10.2/storage/perfschema/pfs.cc:1869

#14 0x00007f26b6d69609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#15 0x00007f26b6943293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95