Assertion `0' failed in Protocol::end_statement upon DELETE .. FOR PORTION via prepared statement

$ perl ./mtr  --ps-protocol period.delete

#7  0x00007f2b5ce20ee2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6

#8  0x0000565362702a79 in Protocol::end_statement (this=0x7f2b040010c8) at /data/src/10.4/sql/protocol.cc:606

#9  0x000056536281f445 in dispatch_command (command=COM_STMT_EXECUTE, thd=0x7f2b04000b00, packet=0x7f2b041a0741 "\v", packet_length=9, is_com_multi=false, is_next_command=false) at /data/src/10.4/sql/sql_parse.cc:2423

#10 0x000056536281bd55 in do_command (thd=0x7f2b04000b00) at /data/src/10.4/sql/sql_parse.cc:1358

#11 0x0000565362995b0d in do_handle_one_connection (connect=0x565365e29890) at /data/src/10.4/sql/sql_connect.cc:1399

#12 0x000056536299587e in handle_one_connection (arg=0x565365e29890) at /data/src/10.4/sql/sql_connect.cc:1302

#13 0x0000565362e8bbf7 in pfs_spawn_thread (arg=0x565365e6f770) at /data/src/10.4/storage/perfschema/pfs.cc:1862

#14 0x00007f2b5eaf7494 in start_thread (arg=0x7f2b5213d700) at pthread_create.c:333

#15 0x00007f2b5cedd93f in clone () from /lib/x86_64-linux-gnu/libc.so.6