Assertion `dict_col_get_fixed_size(f.col, not_redundant()) <= 768' failed in dict_table_t::init_instant

USE test;

CREATE TABLE t (c INT);

ALTER TABLE t ADD d INT FIRST;

ALTER TABLE t ADD e CHAR(255) CHARACTER SET UTF32;

mysqld: /test/10.5_dbg/storage/innobase/handler/handler0alter.cc:173: void dict_table_t::init_instant(const dict_table_t&): Assertion `dict_col_get_fixed_size(f.col, not_redundant()) <= 768' failed.

Core was generated by `/test/MD110520-mariadb-10.5.3-linux-x86_64-dbg/bin/mysqld --no-defaults --core-'.

Program terminated with signal SIGABRT, Aborted.

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6)

    at ../sysdeps/unix/sysv/linux/pthread_kill.c:57

[Current thread is 1 (Thread 0x146a4b686700 (LWP 1681418))]

(gdb) bt

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:57

#1  0x000055f30c918c11 in my_write_core (sig=sig@entry=6) at /test/10.5_dbg/mysys/stacktrace.c:518

#2  0x000055f30c0bdf8d in handle_fatal_signal (sig=6) at /test/10.5_dbg/sql/signal_handler.cc:329

#3  <signal handler called>

#4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51

#5  0x0000146a49dca801 in __GI_abort () at abort.c:79

#6  0x0000146a49dba39a in __assert_fail_base (fmt=0x146a49f417d8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x55f30cd0c6b8 "dict_col_get_fixed_size(f.col, not_redundant()) <= 768", file=file@entry=0x55f30cd032e8 "/test/10.5_dbg/storage/innobase/handler/handler0alter.cc", line=line@entry=173, function=function@entry=0x55f30cd08420 <dict_table_t::init_instant(dict_table_t const&)::__PRETTY_FUNCTION__> "void dict_table_t::init_instant(const dict_table_t&)") at assert.c:92

#7  0x0000146a49dba412 in __GI___assert_fail (assertion=assertion@entry=0x55f30cd0c6b8 "dict_col_get_fixed_size(f.col, not_redundant()) <= 768", file=file@entry=0x55f30cd032e8 "/test/10.5_dbg/storage/innobase/handler/handler0alter.cc", line=line@entry=173, function=function@entry=0x55f30cd08420 <dict_table_t::init_instant(dict_table_t const&)::__PRETTY_FUNCTION__> "void dict_table_t::init_instant(const dict_table_t&)") at assert.c:101

#8  0x000055f30c4bbc9f in dict_table_t::init_instant (this=this@entry=0x146a28452598, table=...) at /test/10.5_dbg/storage/innobase/handler/handler0alter.cc:172

#9  0x000055f30c4c629c in dict_table_t::instant_column (this=0x146a28452598, table=..., col_map=<optimized out>) at /test/10.5_dbg/storage/innobase/handler/handler0alter.cc:630

#10 0x000055f30c4c6834 in ha_innobase_inplace_ctx::instant_column (this=this@entry=0x146a28475990) at /test/10.5_dbg/storage/innobase/handler/handler0alter.cc:1053

#11 0x000055f30c4c6a8a in innobase_instant_try (ha_alter_info=ha_alter_info@entry=0x146a4b6819d0, ctx=ctx@entry=0x146a28475990, altered_table=altered_table@entry=0x146a4b681a70, table=table@entry=0x146a284f0088, trx=trx@entry=0x146a370033b0) at /test/10.5_dbg/storage/innobase/handler/handler0alter.cc:5632

#12 0x000055f30c4ca27f in commit_try_norebuild (ha_alter_info=ha_alter_info@entry=0x146a4b6819d0, ctx=ctx@entry=0x146a28475990, altered_table=altered_table@entry=0x146a4b681a70, old_table=0x146a284f0088, trx=0x146a370033b0, table_name=<optimized out>) at /test/10.5_dbg/storage/innobase/handler/handler0alter.cc:10179

#13 0x000055f30c4b6959 in ha_innobase::commit_inplace_alter_table (this=0x146a284394a0, altered_table=0x146a4b681a70, ha_alter_info=0x146a4b6819d0, commit=true) at /test/10.5_dbg/storage/innobase/handler/handler0alter.cc:10899

#14 0x000055f30c0cc549 in handler::ha_commit_inplace_alter_table (this=0x146a284394a0, altered_table=altered_table@entry=0x146a4b681a70, ha_alter_info=ha_alter_info@entry=0x146a4b6819d0, commit=commit@entry=true) at /test/10.5_dbg/sql/handler.cc:4735

#15 0x000055f30bedeb4c in mysql_inplace_alter_table (thd=thd@entry=0x146a28415088, table_list=0x146a284741b0, table=table@entry=0x146a284f0088, altered_table=altered_table@entry=0x146a4b681a70, ha_alter_info=ha_alter_info@entry=0x146a4b6819d0, inplace_supported=inplace_supported@entry=HA_ALTER_INPLACE_INSTANT, target_mdl_request=0x146a4b682830, alter_ctx=0x146a4b6836c0) at /test/10.5_dbg/sql/sql_table.cc:7920

#16 0x000055f30beeaf17 in mysql_alter_table (thd=thd@entry=0x146a28415088, new_db=new_db@entry=0x146a28419940, new_name=new_name@entry=0x146a28419d48, create_info=create_info@entry=0x146a4b6842b0, table_list=<optimized out>, table_list@entry=0x146a284741b0, alter_info=alter_info@entry=0x146a4b6841e0, order_num=0, order=0x0, ignore=false, if_exists=false) at /test/10.5_dbg/sql/sql_table.cc:10442

#17 0x000055f30bf6e7d0 in Sql_cmd_alter_table::execute (this=<optimized out>, thd=0x146a28415088) at /test/10.5_dbg/sql/sql_alter.cc:532

#18 0x000055f30be19eda in mysql_execute_command (thd=thd@entry=0x146a28415088) at /test/10.5_dbg/sql/sql_parse.cc:5912

#19 0x000055f30be21804 in mysql_parse (thd=thd@entry=0x146a28415088, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x146a4b6853e0, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_dbg/sql/sql_parse.cc:7957

#20 0x000055f30be0dffd in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x146a28415088, packet=packet@entry=0x146a28467089 "ALTER TABLE t ADD e CHAR(255) CHARACTER SET UTF32", packet_length=packet_length@entry=49, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_dbg/sql/sql_parse.cc:1839

#21 0x000055f30be0c8cc in do_command (thd=0x146a28415088) at /test/10.5_dbg/sql/sql_parse.cc:1358

#22 0x000055f30bf6699d in do_handle_one_connection (connect=<optimized out>, connect@entry=0x146a2a4433a8, put_in_cache=put_in_cache@entry=true) at /test/10.5_dbg/sql/sql_connect.cc:1411

#23 0x000055f30bf670b9 in handle_one_connection (arg=arg@entry=0x146a2a4433a8) at /test/10.5_dbg/sql/sql_connect.cc:1313

#24 0x000055f30c3c510a in pfs_spawn_thread (arg=0x146a49045888) at /test/10.5_dbg/storage/perfschema/pfs.cc:2201

#25 0x0000146a4aaad6db in start_thread (arg=0x146a4b686700) at pthread_create.c:463

#26 0x0000146a49eab88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

10.3.23>USE test;

Database changed

10.3.23>CREATE TABLE t (c INT);

Query OK, 0 rows affected (0.012 sec)

10.3.23>ALTER TABLE t ADD d INT FIRST;

Query OK, 0 rows affected (0.033 sec)

Records: 0  Duplicates: 0  Warnings: 0

10.3.23>ALTER TABLE t ADD e CHAR(255) CHARACTER SET UTF32;

Query OK, 0 rows affected (0.004 sec)

Records: 0  Duplicates: 0  Warnings: 0