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

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;