Similar stack from other trial

+bt
#0  0x00007f3143b3f741 in __pthread_kill (threadid=<optimized out>, signo=11) at ../nptl/sysdeps/unix/sysv/linux/pthread_kill.c:61
#1  0x0000000000ac0e2a in my_write_core (sig=11) at /git/compression2_dbg/mysys/stacktrace.c:422
#2  0x00000000007360ff in handle_fatal_signal (sig=11) at /git/compression2_dbg/sql/signal_handler.cc:236
#3  <signal handler called>
#4  0x0000000000ab4f8f in free_root (root=0x7f31440edc30, MyFlags=0) at /git/compression2_dbg/mysys/my_alloc.c:368
#5  0x00000000008ae898 in TABLE_SHARE::destroy (this=0x7f310c0f6410) at /git/compression2_dbg/sql/table.cc:499
#6  0x00000000008aea3d in free_table_share (share=0x7f310c0f6410) at /git/compression2_dbg/sql/table.cc:540
#7  0x0000000000772470 in table_def_free_entry (share=0x7f310c0f6410) at /git/compression2_dbg/sql/sql_base.cc:351
#8  0x0000000000aa1ba7 in my_hash_delete (hash=0x179a0a0 <table_def_cache>, record=0x7f310c0f6410 '\217' <repeats 1500 times>...) at /git/compression2_dbg/mysys/hash.c:603
#9  0x0000000000772e18 in release_table_share (share=0x7f310c0f6410) at /git/compression2_dbg/sql/sql_base.cc:682
#10 0x00000000008b42d3 in closefrm (table=0x7f310c066000, free_share=true) at /git/compression2_dbg/sql/table.cc:2528
#11 0x00000000007733c2 in intern_close_table (table=0x7f310c066000) at /git/compression2_dbg/sql/sql_base.cc:817
#12 0x000000000077491b in close_thread_table (thd=0x7f3113ecd000, table_ptr=0x7f3113ecd0d0) at /git/compression2_dbg/sql/sql_base.cc:1521
#13 0x00000000007742b2 in close_all_tables_for_name (thd=0x7f3113ecd000, share=0x7f310c0f6410, remove_from_locked_tables=false, skip_table=0x0) at /git/compression2_dbg/sql/sql_base.cc:1297
#14 0x000000000085f5be in mysql_inplace_alter_table (thd=0x7f3113ecd000, table_list=0x7f310c01f148, table=0x7f310c066000, altered_table=0x7f310c118e00, ha_alter_info=0x7f31440ee810, inplace_supported=HA_ALTER_INPLACE_NO_LOCK_AFTER_PREPARE, target_mdl_request=0x7f31440ee260, alter_ctx=0x7f31440eed70) at /git/compression2_dbg/sql/sql_table.cc:6913
#15 0x00000000008643a4 in mysql_alter_table (thd=0x7f3113ecd000, new_db=0x7f310c01f6a8 "test", new_name=0x0, create_info=0x7f31440efc30, table_list=0x7f310c01f148, alter_info=0x7f31440efb70, order_num=0, order=0x0, ignore=false) at /git/compression2_dbg/sql/sql_table.cc:8943
#16 0x00000000009ac859 in Sql_cmd_alter_table::execute (this=0x7f310c01f788, thd=0x7f3113ecd000) at /git/compression2_dbg/sql/sql_alter.cc:317
#17 0x00000000007f1361 in mysql_execute_command (thd=0x7f3113ecd000) at /git/compression2_dbg/sql/sql_parse.cc:5528
#18 0x00000000007f4ab1 in mysql_parse (thd=0x7f3113ecd000, rawbuf=0x7f310c01f010 "ALTER TABLE t1 ADD COLUMN c VARCHAR(1000) COLUMN_FORMAT COMPRESSED", length=66, parser_state=0x7f31440f1500) at /git/compression2_dbg/sql/sql_parse.cc:7002
#19 0x00000000007e6768 in dispatch_command (command=COM_QUERY, thd=0x7f3113ecd000, packet=0x7f3113ed1001 "ALTER TABLE t1 ADD COLUMN c VARCHAR(1000) COLUMN_FORMAT COMPRESSED;", packet_length=67) at /git/compression2_dbg/sql/sql_parse.cc:1450
#20 0x00000000007e5609 in do_command (thd=0x7f3113ecd000) at /git/compression2_dbg/sql/sql_parse.cc:1058
#21 0x00000000007acbad in do_handle_one_connection (thd_arg=0x7f3119b2d000) at /git/compression2_dbg/sql/sql_connect.cc:1541
#22 0x00000000007ac62d in handle_one_connection (arg=0x7f3119b2d000) at /git/compression2_dbg/sql/sql_connect.cc:1444
#23 0x0000000000b0f8cd in pfs_spawn_thread (arg=0x7f31297ff380) at /git/compression2_dbg/storage/perfschema/pfs.cc:1860
#24 0x00007f3143b3adc5 in start_thread (arg=0x7f31440f2700) at pthread_create.c:308
#25 0x00007f3141f97ced in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

ALTER TABLE t1 ADD COLUMN c VARCHAR(1000) COLUMN_FORMAT COMPRESSED;