Mysqld crash in cmp_cols_are_equal

# 2025-12-04T04:09:48 [3046488] Thread 1 (Thread 0x77e9f46d36c0 (LWP 3048629)):

# 2025-12-04T04:09:48 [3046488] #0  __pthread_kill_implementation (no_tid=0, signo=11, threadid=<optimized out>) at ./nptl/pthread_kill.c:44

# 2025-12-04T04:09:48 [3046488] #1  __pthread_kill_internal (signo=11, threadid=<optimized out>) at ./nptl/pthread_kill.c:78

# 2025-12-04T04:09:48 [3046488] #2  __GI___pthread_kill (threadid=<optimized out>, signo=11) at ./nptl/pthread_kill.c:89

# 2025-12-04T04:09:48 [3046488] #3  0x00005bee43c50c88 in handle_fatal_signal (sig=11) at /data/Server/10.11G/sql/signal_handler.cc:298

# 2025-12-04T04:09:48 [3046488] #4  <signal handler called>

# 2025-12-04T04:09:48 [3046488] #5  0x00005bee43f0be8e in cmp_cols_are_equal (col1=0x77e9682c7950, col2=0x77e911001201, check_charsets=check_charsets@entry=1) at /data/Server/10.11G/storage/innobase/rem/rem0cmp.cc:84

# 2025-12-04T04:09:48 [3046488] #6  0x00005bee43fad343 in dict_foreign_qualify_index (table=table@entry=0x77e97429a498, col_names=col_names@entry=0x0, columns=columns@entry=0x77e950208270, n_cols=n_cols@entry=1, index=index@entry=0x77e970225968, types_idx=types_idx@entry=0x77e95006b848, check_charsets=true, check_null=0, error=0x0, err_col_no=0x0, err_index=0x0) at /data/Server/10.11G/storage/innobase/dict/dict0dict.cc:4578

# 2025-12-04T04:09:48 [3046488] #7  0x00005bee43fad5f7 in dict_foreign_find_index (table=0x77e97429a498, col_names=0x0, columns=0x77e950208270, n_cols=1, types_idx=0x77e95006b848, check_charsets=check_charsets@entry=true, check_null=0, error=0x0, err_col_no=0x0, err_index=0x0) at /data/Server/10.11G/storage/innobase/dict/dict0dict.cc:2834

# 2025-12-04T04:09:48 [3046488] #8  0x00005bee43eac879 in innobase_update_foreign_try (ctx=ctx@entry=0x77e970014088, trx=trx@entry=0x77e9f5207980, table_name=table_name@entry=0x77e97024afc5 "E") at /data/Server/10.11G/storage/innobase/handler/handler0alter.cc:10105

# 2025-12-04T04:09:48 [3046488] #9  0x00005bee43ebe536 in commit_try_norebuild (ha_alter_info=ha_alter_info@entry=0x77e9f46cf290, ctx=ctx@entry=0x77e970014088, altered_table=altered_table@entry=0x77e9f46cf350, old_table=0x77e9702de008, statistics_exist=statistics_exist@entry=true, trx=trx@entry=0x77e9f5207980, table_name=0x77e97024afc5 "E") at /data/Server/10.11G/storage/innobase/handler/handler0alter.cc:10732

# 2025-12-04T04:09:48 [3046488] #10 0x00005bee43eb5f4b in ha_innobase::commit_inplace_alter_table (this=<optimized out>, altered_table=<optimized out>, ha_alter_info=<optimized out>, commit=<optimized out>) at /data/Server/10.11G/storage/innobase/handler/handler0alter.cc:11653

# 2025-12-04T04:09:48 [3046488] #11 0x00005bee43ac1c7a in mysql_inplace_alter_table (thd=thd@entry=0x77e970000c68, table_list=0x77e970010f08, table=table@entry=0x77e9702de008, altered_table=altered_table@entry=0x77e9f46cf350, ha_alter_info=ha_alter_info@entry=0x77e9f46cf290, ddl_log_state=ddl_log_state@entry=0x77e9f46cf270, trigger_param=0x77e9f46cf730, alter_ctx=0x77e9f46d05c0, partial_alter=@0x77e9f46cf1e7: false, start_alter_id=@0x77e9f46cf1f0: 0, if_exists=false, target_mdl_request=0x77e9f46cfb70) at /data/Server/10.11G/sql/sql_table.cc:8194

# 2025-12-04T04:09:48 [3046488] #12 0x00005bee43ad5302 in mysql_alter_table (thd=thd@entry=0x77e970000c68, new_db=new_db@entry=0x77e970005648, new_name=new_name@entry=0x77e970005aa8, create_info=create_info@entry=0x77e9f46d1440, table_list=<optimized out>, table_list@entry=0x77e970010f08, recreate_info=recreate_info@entry=0x77e9f46d12b0, alter_info=0x77e9f46d12d0, order_num=0, order=0x0, ignore=false, if_exists=false) at /data/Server/10.11G/sql/sql_table.cc:11408

# 2025-12-04T04:09:48 [3046488] #13 0x00005bee43b37a58 in Sql_cmd_alter_table::execute (this=<optimized out>, thd=0x77e970000c68) at /data/Server/10.11G/sql/sql_alter.cc:688

# 2025-12-04T04:09:48 [3046488] #14 0x00005bee43a175e6 in mysql_execute_command (thd=thd@entry=0x77e970000c68, is_called_from_prepared_stmt=is_called_from_prepared_stmt@entry=false) at /data/Server/10.11G/sql/sql_parse.cc:6207

# 2025-12-04T04:09:48 [3046488] #15 0x00005bee43a1c2f3 in mysql_parse (thd=0x77e970000c68, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>) at /data/Server/10.11G/sql/sql_parse.cc:8229

# 2025-12-04T04:09:48 [3046488] #16 0x00005bee43a1e082 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x77e970000c68, packet=packet@entry=0x77e970008599 "ALTER TABLE `E` /*!100301 WAIT 3 */ ADD CONSTRAINT h FOREIGN KEY q ( `col_int_nokey` ) REFERENCES `C` (col_int_nokey) /*!100307, ALGORITHM=NOCOPY */  /* E_R Thread4 QNO 55205 CON_ID 19 */ ", packet_length=packet_length@entry=188, blocking=blocking@entry=true) at /data/Server/10.11G/sql/sql_parse.cc:2020

# 2025-12-04T04:09:48 [3046488] #17 0x00005bee43a1fce5 in do_command (thd=thd@entry=0x77e970000c68, blocking=blocking@entry=true) at /data/Server/10.11G/sql/sql_parse.cc:1434

# 2025-12-04T04:09:48 [3046488] #18 0x00005bee43b31c0d in do_handle_one_connection (connect=<optimized out>, put_in_cache=true) at /data/Server/10.11G/sql/sql_connect.cc:1475

# 2025-12-04T04:09:48 [3046488] #19 0x00005bee43b31efd in handle_one_connection (arg=0x5bee46aaa678) at /data/Server/10.11G/sql/sql_connect.cc:1387

# 2025-12-04T04:09:48 [3046488] #20 0x000077e9f589ca94 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447

# 2025-12-04T04:09:48 [3046488] #21 0x000077e9f5929c3c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78