Server crash upon inserting into Mroonga table with compressed column

INSTALL SONAME 'ha_mroonga';

CREATE TABLE t (a VARCHAR(128) COMPRESSED) ENGINE=Mroonga;

INSERT INTO t VALUES (REPEAT('a',128));

# Cleanup

DROP TABLE t;

UNINSTALL SONAME 'ha_mroonga';

#3  <signal handler called>

#4  0x0000558da26e2597 in Binary_string::alloc (this=0x8, arg_length=128) at /data/src/11.1/sql/sql_string.h:790

#5  0x0000558da329f81e in uncompress_zlib (to=0x0, from=0x61900009cecb "\200KL\034X", from_length=7, field_length=129) at /data/src/11.1/sql/field_comp.cc:110

#6  0x0000558da326c916 in Field_longstr::uncompress (this=0x61900009d010, val_buffer=0x0, val_ptr=0x7f89f2d79c50, from=0x61900009ceca "\211\200KL\034X", from_length=8) at /data/src/11.1/sql/field.cc:8468

#7  0x0000558da326cd9d in Field_varstring_compressed::val_str (this=0x61900009d010, val_buffer=0x0, val_ptr=0x7f89f2d79c50) at /data/src/11.1/sql/field.cc:8510

#8  0x00007f89f161ba9a in ha_mroonga::generic_store_bulk_variable_size_string (this=0x622000037938, field=0x61900009d010, buf=0x7f89f2d7a880) at /data/src/11.1/storage/mroonga/ha_mroonga.cpp:10343

#9  0x00007f89f1622965 in ha_mroonga::generic_store_bulk (this=0x622000037938, field=0x61900009d010, buf=0x7f89f2d7a880) at /data/src/11.1/storage/mroonga/ha_mroonga.cpp:10798

#10 0x00007f89f15dd43a in ha_mroonga::storage_write_row (this=0x622000037938, buf=0x61900009cec8 "\376\b\211\200KL\034X") at /data/src/11.1/storage/mroonga/ha_mroonga.cpp:6111

#11 0x00007f89f15e25b3 in ha_mroonga::write_row (this=0x622000037938, buf=0x61900009cec8 "\376\b\211\200KL\034X") at /data/src/11.1/storage/mroonga/ha_mroonga.cpp:6434

#12 0x0000558da32ff74a in handler::ha_write_row (this=0x622000037938, buf=0x61900009cec8 "\376\b\211\200KL\034X") at /data/src/11.1/sql/handler.cc:7804

#13 0x0000558da2907715 in write_record (thd=0x62b00007e218, table=0x61900009c998, info=0x7f89f2d7eb30, sink=0x0) at /data/src/11.1/sql/sql_insert.cc:2204

#14 0x0000558da28fea47 in mysql_insert (thd=0x62b00007e218, table_list=0x6290000e6358, fields=..., values_list=..., update_fields=..., update_values=..., duplic=DUP_ERROR, ignore=false, result=0x0) at /data/src/11.1/sql/sql_insert.cc:1154

#15 0x0000558da29c798f in mysql_execute_command (thd=0x62b00007e218, is_called_from_prepared_stmt=false) at /data/src/11.1/sql/sql_parse.cc:4449

#16 0x0000558da29de717 in mysql_parse (thd=0x62b00007e218, rawbuf=0x6290000e6238 "INSERT INTO t VALUES (REPEAT('a',128))", length=38, parser_state=0x7f89f2d7f9f0) at /data/src/11.1/sql/sql_parse.cc:7774

#17 0x0000558da29b6cba in dispatch_command (command=COM_QUERY, thd=0x62b00007e218, packet=0x629000258219 "INSERT INTO t VALUES (REPEAT('a',128))", packet_length=38, blocking=true) at /data/src/11.1/sql/sql_parse.cc:1892

#18 0x0000558da29b39f7 in do_command (thd=0x62b00007e218, blocking=true) at /data/src/11.1/sql/sql_parse.cc:1405

#19 0x0000558da2e74af0 in do_handle_one_connection (connect=0x608000002eb8, put_in_cache=true) at /data/src/11.1/sql/sql_connect.cc:1416

#20 0x0000558da2e744b1 in handle_one_connection (arg=0x608000002e38) at /data/src/11.1/sql/sql_connect.cc:1318

#21 0x0000558da3a707b2 in pfs_spawn_thread (arg=0x617000005b98) at /data/src/11.1/storage/perfschema/pfs.cc:2201

#22 0x00007f89fa8a7fd4 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442

#23 0x00007f89fa9285bc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81