SET sql_mode='';

CREATE TEMPORARY TABLE t0 (a INT) ENGINE=MYISAM ;

ALTER TABLE t0 ADD COLUMN z0 INT DEFAULT (a+0);

SET STATEMENT sql_mode='' FOR ALTER TABLE t0 CHANGE a a VARCHAR(1);

INSERT INTO t0 VALUES (0,DEFAULT);

mariadbd: /test/server_dbg/sql/field.cc:7982: virtual double Field_varstring::val_real(): Assertion `marked_for_read()' failed.

Core was generated by `/test/MD200324-mariadb-11.5.0-linux-x86_64-dbg/bin/mariadbd --no-defaults --max'.

Program terminated with signal SIGABRT, Aborted.

#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50

[Current thread is 1 (Thread 0x14e8f405f700 (LWP 973951))]

(gdb) bt

#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50

#1  0x000014e8f8342859 in __GI_abort () at abort.c:79

#2  0x000014e8f8342729 in __assert_fail_base (fmt=0x14e8f84d8588 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x56497bdf0607 "marked_for_read()", file=0x56497bdf0473 "/test/server_dbg/sql/field.cc", line=7982, function=<optimized out>) at assert.c:92

#3  0x000014e8f8353fd6 in __GI___assert_fail (assertion=assertion@entry=0x56497bdf0607 "marked_for_read()", file=file@entry=0x56497bdf0473 "/test/server_dbg/sql/field.cc", line=line@entry=7982, function=function@entry=0x56497bdf27e8 "virtual double Field_varstring::val_real()") at assert.c:101

#4  0x000056497b282959 in Field_varstring::val_real (this=0x14e8ac023ca0) at /test/server_dbg/sql/field.cc:7982

#5  0x000056497b2cd349 in Item_field::val_real (this=0x14e8ac025020) at /test/server_dbg/sql/item.cc:3348

#6  0x000056497b34e26e in Item_func_plus::real_op (this=0x14e8ac025140) at /test/server_dbg/sql/item_func.cc:1112

#7  0x000056497b1bd226 in Item_func_hybrid_field_type::val_real_from_real_op (this=<optimized out>) at /test/server_dbg/sql/item_func.h:924

#8  Type_handler_real_result::Item_func_hybrid_field_type_val_real (this=<optimized out>, item=<optimized out>) at /test/server_dbg/sql/sql_type.cc:5500

#9  0x000056497b318c09 in Item_func_hybrid_field_type::val_real (this=0x14e8ac025140) at /test/server_dbg/sql/sql_type.h:7596

#10 0x000056497b2e63df in Item::save_real_in_field (this=0x14e8ac025140, field=0x14e8ac023d80, no_conversions=<optimized out>) at /test/server_dbg/sql/item.cc:6831

#11 0x000056497b1bffae in Type_handler_real_result::Item_save_in_field (this=<optimized out>, item=<optimized out>, field=<optimized out>, no_conversions=<optimized out>) at /test/server_dbg/sql/sql_type.cc:4343

#12 0x000056497b2cafbb in Item::save_in_field (this=0x14e8ac025140, field=0x14e8ac023d80, no_conversions=<optimized out>) at /test/server_dbg/sql/item.cc:6861

#13 0x000056497b27750a in Field::set_default (this=0x14e8ac023d80) at /test/server_dbg/sql/field.cc:2689

#14 0x000056497b29a300 in Field::save_in_field_default_value (this=0x14e8ac023d80, view_error_processing=view_error_processing@entry=false) at /test/server_dbg/sql/field.cc:11491

#15 0x000056497b23df53 in Item_default_specification::save_in_field (this=<optimized out>, field_arg=<optimized out>) at /test/server_dbg/sql/item.h:6879

#16 0x000056497aeec5b5 in fill_record (thd=thd@entry=0x14e8ac000d48, table=table@entry=0x14e8ac021b08, ptr=0x14e8ac023c88, ptr@entry=0x14e8ac023c78, values=@0x14e8ac01bb18: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x14e8ac01bbb8, last = 0x14e8ac01bc38, elements = 2}, <No data fields>}, ignore_errors=ignore_errors@entry=false, use_value=use_value@entry=false) at /test/server_dbg/sql/sql_base.cc:9333

#17 0x000056497aeec66f in fill_record_n_invoke_before_triggers (thd=thd@entry=0x14e8ac000d48, table=table@entry=0x14e8ac021b08, ptr=0x14e8ac023c78, values=@0x14e8ac01bb18: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x14e8ac01bbb8, last = 0x14e8ac01bc38, elements = 2}, <No data fields>}, ignore_errors=ignore_errors@entry=false, event=event@entry=TRG_EVENT_INSERT) at /test/server_dbg/sql/sql_base.cc:9388

#18 0x000056497af31e5a in mysql_insert (thd=thd@entry=0x14e8ac000d48, table_list=<optimized out>, fields=@0x14e8ac006168: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x56497c6dbc80 <end_of_list>, last = 0x14e8ac006168, elements = 0}, <No data fields>}, values_list=@0x14e8ac0061b0: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x14e8ac01bc60, last = 0x14e8ac01bc60, elements = 1}, <No data fields>}, update_fields=@0x14e8ac006198: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x56497c6dbc80 <end_of_list>, last = 0x14e8ac006198, elements = 0}, <No data fields>}, update_values=@0x14e8ac006180: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x56497c6dbc80 <end_of_list>, last = 0x14e8ac006180, elements = 0}, <No data fields>}, duplic=DUP_ERROR, ignore=false, result=0x0) at /test/server_dbg/sql/sql_insert.cc:1112

#19 0x000056497af7212f in mysql_execute_command (thd=thd@entry=0x14e8ac000d48, is_called_from_prepared_stmt=is_called_from_prepared_stmt@entry=false) at /test/server_dbg/sql/sql_parse.cc:4452

#20 0x000056497af618a6 in mysql_parse (thd=thd@entry=0x14e8ac000d48, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x14e8f405e270) at /test/server_dbg/sql/sql_parse.cc:7821

#21 0x000056497af78b61 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x14e8ac000d48, packet=packet@entry=0x14e8ac00b229 "INSERT INTO t0 VALUES (0,DEFAULT)", packet_length=packet_length@entry=33, blocking=blocking@entry=true) at /test/server_dbg/sql/sql_class.h:1636

#22 0x000056497af7b5d9 in do_command (thd=0x14e8ac000d48, blocking=blocking@entry=true) at /test/server_dbg/sql/sql_parse.cc:1405

#23 0x000056497b100545 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x56497dbf4088, put_in_cache=put_in_cache@entry=true) at /test/server_dbg/sql/sql_connect.cc:1447

#24 0x000056497b100afa in handle_one_connection (arg=arg@entry=0x56497dbf4088) at /test/server_dbg/sql/sql_connect.cc:1349

#25 0x000056497b581c58 in pfs_spawn_thread (arg=0x56497dbc8748) at /test/server_dbg/storage/perfschema/pfs.cc:2201

#26 0x000014e8f8853609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#27 0x000014e8f843f133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

USE test;

SET SQL_MODE='';

CREATE TABLE t (v TEXT AS (c), c INT) ENGINE=MyISAM;

INSERT INTO t VALUES(1,1);

CHECKSUM TABLE t;

USE test;

SET SQL_MODE='';

CREATE TABLE t (a BLOB, b BLOB GENERATED ALWAYS AS (a) VIRTUAL) ENGINE=MyISAM;

INSERT INTO t values (1,1),(2,2);

CHECKSUM TABLE t;

mysqld: /test/10.5_dbg/sql/field.cc:8494: virtual String* Field_blob::val_str(String*, String*): Assertion `marked_for_read()' failed.

Core was generated by `/test/MD110820-mariadb-10.5.6-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 0x150a430c3700 (LWP 827339))]

(gdb) bt

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

#1  0x00005645ca0e2b86 in my_write_core (sig=sig@entry=6) at /test/10.5_dbg/mysys/stacktrace.c:519

#2  0x00005645c9899d7b in handle_fatal_signal (sig=6) at /test/10.5_dbg/sql/signal_handler.cc:330

#3  <signal handler called>

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

#5  0x0000150a413598b1 in __GI_abort () at abort.c:79

#6  0x0000150a4134942a in __assert_fail_base (fmt=0x150a414d0a38 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x5645ca3eb604 "marked_for_read()", file=file@entry=0x5645ca3eb433 "/test/10.5_dbg/sql/field.cc", line=line@entry=8494, function=function@entry=0x5645ca3edca0 <Field_blob::val_str(String*, String*)::__PRETTY_FUNCTION__> "virtual String* Field_blob::val_str(String*, String*)") at assert.c:92

#7  0x0000150a413494a2 in __GI___assert_fail (assertion=assertion@entry=0x5645ca3eb604 "marked_for_read()", file=file@entry=0x5645ca3eb433 "/test/10.5_dbg/sql/field.cc", line=line@entry=8494, function=function@entry=0x5645ca3edca0 <Field_blob::val_str(String*, String*)::__PRETTY_FUNCTION__> "virtual String* Field_blob::val_str(String*, String*)") at assert.c:101

#8  0x00005645c9879b48 in Field_blob::val_str (this=0x150a1ec52218, val_buffer=<optimized out>, val_ptr=0x150a430c1850) at /test/10.5_dbg/sql/field.cc:8494

#9  0x00005645c98a22da in Field::val_str (str=0x150a430c1850, this=0x150a1ec52218) at /test/10.5_dbg/sql/field.h:1025

#10 handler::calculate_checksum (this=0x150a1ec376a0) at /test/10.5_dbg/sql/handler.cc:5461

#11 0x00005645c96b8910 in mysql_checksum_table (thd=thd@entry=0x150a1ec15088, tables=tables@entry=0x150a1ec74160, check_opt=check_opt@entry=0x150a1ec1a338) at /test/10.5_dbg/sql/sql_table.cc:11595

#12 0x00005645c95ecf71 in mysql_execute_command (thd=thd@entry=0x150a1ec15088) at /test/10.5_dbg/sql/sql_parse.cc:4369

#13 0x00005645c95f8d4e in mysql_parse (thd=thd@entry=0x150a1ec15088, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x150a430c2350, 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:7994

#14 0x00005645c95e577e in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x150a1ec15088, packet=packet@entry=0x150a1ec67089 "", packet_length=packet_length@entry=16, 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:1867

#15 0x00005645c95e3f58 in do_command (thd=0x150a1ec15088) at /test/10.5_dbg/sql/sql_parse.cc:1348

#16 0x00005645c9740bc9 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x150a220d03a8, put_in_cache=put_in_cache@entry=true) at /test/10.5_dbg/sql/sql_connect.cc:1410

#17 0x00005645c97412e5 in handle_one_connection (arg=arg@entry=0x150a220d03a8) at /test/10.5_dbg/sql/sql_connect.cc:1312

#18 0x00005645c9ba7572 in pfs_spawn_thread (arg=0x150a3fc46508) at /test/10.5_dbg/storage/perfschema/pfs.cc:2201

#19 0x0000150a4203c6db in start_thread (arg=0x150a430c3700) at pthread_create.c:463

#20 0x0000150a4143aa3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95