ALTER TABLE .. RENAME with COPY algorithm leaves the old table behind

CREATE TABLE `t+1` (c1 INT);

ALTER TABLE  `t+1` RENAME `t+2`, ALGORITHM=COPY;

SHOW TABLES;

# Cleanup

DROP TABLE IF EXISTS `t+1`,`t+2`;

ALTER TABLE  `t+1` RENAME `t+2`, ALGORITHM=COPY;

Warnings:

Warning	6	Error on delete of './test/t+1.MYI' (Errcode: 2 "No such file or directory")

Warning	6	Error on delete of './test/t+1.MYD' (Errcode: 2 "No such file or directory")

SHOW TABLES;

Tables_in_test

t+1

t+2

mariadbd: /data/src/10.5/sql/protocol.cc:619: void Protocol::end_statement(): Assertion `0' failed.

230324 16:05:44 [ERROR] mysqld got signal 6 ;

#9  0x00007f9008653df2 in __GI___assert_fail (assertion=0x555736f86098 "0", file=0x555736f85c58 "/data/src/10.5/sql/protocol.cc", line=619, function=0x555736f86010 "void Protocol::end_statement()") at ./assert/assert.c:101

#10 0x000055573607a0f7 in Protocol::end_statement (this=0x7f8fe80013c8) at /data/src/10.5/sql/protocol.cc:619

#11 0x00005557361b769b in dispatch_command (command=COM_QUERY, thd=0x7f8fe8000dc8, packet=0x7f8fe800b629 "", packet_length=47, is_com_multi=false, is_next_command=false) at /data/src/10.5/sql/sql_parse.cc:2476

#12 0x00005557361b3d72 in do_command (thd=0x7f8fe8000dc8) at /data/src/10.5/sql/sql_parse.cc:1375

#13 0x0000555736371e39 in do_handle_one_connection (connect=0x5557392e95b8, put_in_cache=true) at /data/src/10.5/sql/sql_connect.cc:1416

#14 0x0000555736371bb5 in handle_one_connection (arg=0x5557392ae128) at /data/src/10.5/sql/sql_connect.cc:1318

#15 0x00005557368ab7e6 in pfs_spawn_thread (arg=0x5557392e91f8) at /data/src/10.5/storage/perfschema/pfs.cc:2201

#16 0x00007f90086a7fd4 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442

#17 0x00007f900872866c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

commit 043a3a0176e220e4648521b2e89881c5261e6dd4

Author: Monty

Date:   Wed May 8 23:39:29 2019 +0300

    Avoid not needed renames in ALTER TABLE

commit ab38b7511bad8cc03a67f0d43e7169e6dfcac9fa (HEAD)

Author: Monty

Date:   Mon Apr 15 18:16:02 2019 +0300

    MDEV-17841 S3 storage engine