SIGSEGV in fts_create_in_mem_aux_table

CREATE TABLE t (a CHAR,FULLTEXT KEY(a)) ENGINE=InnoDB;

ALTER TABLE t DISCARD TABLESPACE;

ALTER TABLE t ADD FULLTEXT INDEX (a);

Core was generated by `/test/MD060321-mariadb-10.6.0-linux-x86_64-opt/bin/mysqld --no-defaults --core-'.

Program terminated with signal SIGSEGV, Segmentation fault.

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=11)

    at ../sysdeps/unix/sysv/linux/pthread_kill.c:56

[Current thread is 1 (Thread 0x14dd1052a700 (LWP 359730))]

(gdb) bt

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=11) at ../sysdeps/unix/sysv/linux/pthread_kill.c:56

#1  0x00005643a016ff6f in my_write_core (sig=sig@entry=11) at /test/10.6_opt/mysys/stacktrace.c:424

#2  0x000056439fbf8b90 in handle_fatal_signal (sig=11) at /test/10.6_opt/sql/signal_handler.cc:331

#3  <signal handler called>

#4  0x00005643a00c8661 in fts_create_in_mem_aux_table (aux_table_name=aux_table_name@entry=0x14dd10525400 "test/FTS_", '0' <repeats 14 times>, "1e_", '0' <repeats 14 times>, "25_INDEX_1", table=0x14dcd4019170, n_cols=n_cols@entry=5) at /test/10.6_opt/storage/innobase/fts/fts0fts.cc:1719

#5  0x00005643a00c9da8 in fts_create_one_index_table (trx=0x14dd24254130, fts_table=0x14dd10525730, heap=0x14dcd4027038, index=<optimized out>) at /test/10.6_opt/storage/innobase/fts/fts0fts.cc:1959

#6  0x00005643a00d2507 in fts_create_index_tables (trx=0x14dd24254130, index=index@entry=0x14dcd4024890, id=<optimized out>) at /test/10.6_opt/storage/innobase/fts/fts0fts.cc:2068

#7  0x000056439ff33339 in prepare_inplace_alter_table_dict (ha_alter_info=<optimized out>, altered_table=<optimized out>, old_table=<optimized out>, table_name=<optimized out>, flags=<optimized out>, flags2=<optimized out>, fts_doc_id_col=<optimized out>, add_fts_doc_id=<optimized out>, add_fts_doc_id_idx=<optimized out>) at /test/10.6_opt/storage/innobase/handler/handler0alter.cc:7032

#8  0x000056439ff386ed in ha_innobase::prepare_inplace_alter_table (this=<optimized out>, altered_table=<optimized out>, ha_alter_info=<optimized out>) at /test/10.6_opt/storage/innobase/handler/ha_innodb.h:707

#9  0x000056439fa8b31b in mysql_inplace_alter_table (thd=0x14dcd4000c58, table_list=0x14dcd4010580, table=0x14dcd40337f8, altered_table=0x14dd10526a30, ha_alter_info=0x14dd10526980, alter_ctx=0x14dd105279e0, target_mdl_request=<optimized out>) at /test/10.6_opt/sql/sql_table.cc:8106

#10 0x000056439fa98925 in mysql_alter_table (thd=thd@entry=0x14dcd4000c58, new_db=new_db@entry=0x14dcd4005510, new_name=new_name@entry=0x14dcd4005910, create_info=create_info@entry=0x14dd10528610, table_list=<optimized out>, table_list@entry=0x14dcd4010580, alter_info=alter_info@entry=0x14dd10528520, order_num=0, order=0x0, ignore=false, if_exists=false) at /test/10.6_opt/sql/sql_table.cc:10780

#11 0x000056439faf7053 in Sql_cmd_alter_table::execute (this=<optimized out>, thd=0x14dcd4000c58) at /test/10.6_opt/sql/structs.h:563

#12 0x000056439f9f1d56 in mysql_execute_command (thd=0x14dcd4000c58) at /test/10.6_opt/sql/sql_parse.cc:5972

#13 0x000056439f9e24b4 in mysql_parse (thd=0x14dcd4000c58, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>) at /test/10.6_opt/sql/sql_parse.cc:7998

#14 0x000056439f9ee2a5 in dispatch_command (command=COM_QUERY, thd=0x14dcd4000c58, packet=<optimized out>, packet_length=<optimized out>, blocking=<optimized out>) at /test/10.6_opt/sql/sql_class.h:1318

#15 0x000056439f9f02f0 in do_command (thd=0x14dcd4000c58, blocking=blocking@entry=true) at /test/10.6_opt/sql/sql_parse.cc:1397

#16 0x000056439faf25d7 in do_handle_one_connection (connect=<optimized out>, put_in_cache=true) at /test/10.6_opt/sql/sql_connect.cc:1410

#17 0x000056439faf293d in handle_one_connection (arg=arg@entry=0x5643a2ebc678) at /test/10.6_opt/sql/sql_connect.cc:1312

#18 0x000056439fe710f9 in pfs_spawn_thread (arg=0x5643a2e2a218) at /test/10.6_opt/storage/perfschema/pfs.cc:2201

#19 0x000014dd258d1609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#20 0x000014dd254c0293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

10.2.38>ALTER TABLE t ADD FULLTEXT INDEX (a);

Query OK, 0 rows affected, 1 warning (0.04 sec)

Records: 0  Duplicates: 0  Warnings: 1