Assertion failure upon altering temporary S3 table

create temporary table t1 (a int);

alter table t1 engine=S3;

alter table t1 add b int;

2019-05-14  0:51:37 4 [Warning] Could not remove temporary table: '/data/bld/maria-s3/mysql-test/var/tmp/mysqld.1/#sql6eec_4_1', error: 155

mysqld: /data/src/maria-s3/sql/sql_error.cc:335: void Diagnostics_area::set_ok_status(ulonglong, ulonglong, const char*): Assertion `!is_set() || (m_status == DA_OK_BULK && is_bulk_op())' failed.

190514  0:51:37 [ERROR] mysqld got signal 6 ;

#5  0x00007f9c06ec142a in __GI_abort () at abort.c:89

#6  0x00007f9c06eb8e67 in __assert_fail_base (fmt=<optimized out>, assertion=assertion@entry=0x55cbc5f2d278 "!is_set() || (m_status == DA_OK_BULK && is_bulk_op())", file=file@entry=0x55cbc5f2d1b0 "/data/src/maria-s3/sql/sql_error.cc", line=line@entry=335, function=function@entry=0x55cbc5f2d5a0 <Diagnostics_area::set_ok_status(unsigned long long, unsigned long long, char const*)::__PRETTY_FUNCTION__> "void Diagnostics_area::set_ok_status(ulonglong, ulonglong, const char*)") at assert.c:92

#7  0x00007f9c06eb8f12 in __GI___assert_fail (assertion=0x55cbc5f2d278 "!is_set() || (m_status == DA_OK_BULK && is_bulk_op())", file=0x55cbc5f2d1b0 "/data/src/maria-s3/sql/sql_error.cc", line=335, function=0x55cbc5f2d5a0 <Diagnostics_area::set_ok_status(unsigned long long, unsigned long long, char const*)::__PRETTY_FUNCTION__> "void Diagnostics_area::set_ok_status(ulonglong, ulonglong, const char*)") at assert.c:101

#8  0x000055cbc52dc2dd in Diagnostics_area::set_ok_status (this=0x7f9bd80064c0, affected_rows=0, last_insert_id=0, message=0x7f9bf94aa190 "Records: 0  Duplicates: 0  Warnings: 1") at /data/src/maria-s3/sql/sql_error.cc:335

#9  0x000055cbc5284272 in my_ok (thd=0x7f9bd8000b10, affected_rows_arg=0, id=0, message=0x7f9bf94aa190 "Records: 0  Duplicates: 0  Warnings: 1") at /data/src/maria-s3/sql/sql_class.h:4994

#10 0x000055cbc54178ca in mysql_alter_table (thd=0x7f9bd8000b10, new_db=0x7f9bd80052b0, new_name=0x7f9bd80056b8, create_info=0x7f9bf94aacf0, table_list=0x7f9bd80131e8, alter_info=0x7f9bf94aac30, order_num=0, order=0x0, ignore=false) at /data/src/maria-s3/sql/sql_table.cc:10381

#11 0x000055cbc54a6fa9 in Sql_cmd_alter_table::execute (this=0x7f9bd80139b8, thd=0x7f9bd8000b10) at /data/src/maria-s3/sql/sql_alter.cc:496

#12 0x000055cbc53370cc in mysql_execute_command (thd=0x7f9bd8000b10) at /data/src/maria-s3/sql/sql_parse.cc:6340

#13 0x000055cbc533c3dd in mysql_parse (thd=0x7f9bd8000b10, rawbuf=0x7f9bd8013108 "alter table t1 add b int", length=24, parser_state=0x7f9bf94ac180, is_com_multi=false, is_next_command=false) at /data/src/maria-s3/sql/sql_parse.cc:8152

#14 0x000055cbc5327a67 in dispatch_command (command=COM_QUERY, thd=0x7f9bd8000b10, packet=0x7f9bd8119631 "", packet_length=24, is_com_multi=false, is_next_command=false) at /data/src/maria-s3/sql/sql_parse.cc:1829

#15 0x000055cbc5326227 in do_command (thd=0x7f9bd8000b10) at /data/src/maria-s3/sql/sql_parse.cc:1362

#16 0x000055cbc549df2d in do_handle_one_connection (connect=0x55cbc92fa260) at /data/src/maria-s3/sql/sql_connect.cc:1398

#17 0x000055cbc549dc91 in handle_one_connection (arg=0x55cbc92fa260) at /data/src/maria-s3/sql/sql_connect.cc:1301

#18 0x000055cbc5dd307b in pfs_spawn_thread (arg=0x55cbc926bbd0) at /data/src/maria-s3/storage/perfschema/pfs.cc:1862

#19 0x00007f9c092944a4 in start_thread (arg=0x7f9bf94ad700) at pthread_create.c:456

#20 0x00007f9c06f75d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97