union

  {

    longlong integer;

    double   real;

    /*

      Character sets conversion info for string values.

      Character sets of client and connection defined at bind time are used

      for all conversions, even if one of them is later changed (i.e.

      between subsequent calls to mysql_stmt_execute).

    */

    struct CONVERSION_INFO

    {

      CHARSET_INFO *character_set_client;

      CHARSET_INFO *character_set_of_placeholder;

      /*

        This points at character set of connection if conversion

        to it is required (i. e. if placeholder typecode is not BLOB).

        Otherwise it's equal to character_set_client (to simplify

        check in convert_str_value()).

      */

      CHARSET_INFO *final_character_set_of_str_value;

    } cs_info;

    MYSQL_TIME     time;

  } value;

diff --git a/unittest/libmariadb/CMakeLists.txt b/unittest/libmariadb/CMakeLists.txt

index e3ba18b..08ed7a4 100644

--- a/unittest/libmariadb/CMakeLists.txt

+++ b/unittest/libmariadb/CMakeLists.txt

@@ -26,7 +26,7 @@ INCLUDE_DIRECTORIES(${CC_SOURCE_DIR}/include

                     ${CC_SOURCE_DIR}/unittest/libmariadb)

 ADD_DEFINITIONS(-DLIBMARIADB)

-SET(API_TESTS "conc336" "bulk1" "performance" "basic-t" "fetch" "charset" "logs" "cursor" "errors" "view" "ps" "ps_bugs" "sp" "result" "connection" "misc" "ps_new" "thread" "features-10_2" "bulk1")

+SET(API_TESTS "conc336" "bulk1" "performance" "basic-t" "fetch" "charset" "logs" "cursor" "errors" "view" "ps" "ps_bugs" "sp" "result" "connection" "misc" "ps_new" "thread" "features-10_2" "bulk1" "crash")

 IF(WITH_DYNCOL)

   SET(API_TESTS ${API_TESTS} "dyncol")

 ENDIF()

$ unittest/libmariadb/crash -u root -d test -S /tmp/mysql.sock

# port: 0

# ssl_port: 0

1..1

# Testing against MySQL Server 10.2.37-MariaDB

# Host: Localhost via UNIX socket

# Client library: 10.5.5

# Error: Lost connection to MySQL server during query (/home/dan/repos/mariadb-connector-c/unittest/libmariadb/crash.c: 132)

not ok 1 - test_reexecute,

# error: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)

# Couldn't establish connection to server (null). Error (2002): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)

# Failed 1 tests!

$ ./mariadb-10.2.37-linux-systemd-i686/bin/mysqld --no-defaults --basedir=$PWD/mariadb-10.2.37-linux-systemd-i686 --datadir=/tmp/10.2 --skip-networking

2021-03-20 16:03:51 4154480064 [Note] ./mariadb-10.2.37-linux-systemd-i686/bin/mysqld (mysqld 10.2.37-MariaDB) starting as process 256190 ...

2021-03-20 16:03:51 4154480064 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins

2021-03-20 16:03:51 4154480064 [Note] InnoDB: Uses event mutexes

2021-03-20 16:03:51 4154480064 [Note] InnoDB: Compressed tables use zlib 1.2.11

2021-03-20 16:03:51 4154480064 [Note] InnoDB: Using Linux native AIO

2021-03-20 16:03:51 4154480064 [Note] InnoDB: Number of pools: 1

2021-03-20 16:03:51 4154480064 [Note] InnoDB: Using generic crc32 instructions

2021-03-20 16:03:51 4154480064 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M

2021-03-20 16:03:51 4154480064 [Note] InnoDB: Completed initialization of buffer pool

2021-03-20 16:03:51 3600054976 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().

2021-03-20 16:03:51 4154480064 [Note] InnoDB: Highest supported file format is Barracuda.

2021-03-20 16:03:52 4154480064 [Note] InnoDB: 128 out of 128 rollback segments are active.

2021-03-20 16:03:52 4154480064 [Note] InnoDB: Creating shared tablespace for temporary tables

2021-03-20 16:03:52 4154480064 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...

2021-03-20 16:03:52 4154480064 [Note] InnoDB: File './ibtmp1' size is now 12 MB.

2021-03-20 16:03:52 4154480064 [Note] InnoDB: Waiting for purge to start

2021-03-20 16:03:52 4154480064 [Note] InnoDB: 5.7.33 started; log sequence number 1615517

2021-03-20 16:03:52 3491756736 [Note] InnoDB: Loading buffer pool(s) from /tmp/10.2/ib_buffer_pool

2021-03-20 16:03:52 4154480064 [Note] Plugin 'FEEDBACK' is disabled.

2021-03-20 16:03:52 3491756736 [Note] InnoDB: Buffer pool(s) load completed at 210320 16:03:52

2021-03-20 16:03:52 4154480064 [Note] Reading of all Master_info entries succeeded

2021-03-20 16:03:52 4154480064 [Note] Added new Master_info '' to hash table

2021-03-20 16:03:52 4154480064 [Note] ./mariadb-10.2.37-linux-systemd-i686/bin/mysqld: ready for connections.

Version: '10.2.37-MariaDB'  socket: '/tmp/mysql.sock'  port: 0  MariaDB Server

210320 16:10:21 [ERROR] mysqld got signal 11 ;

This could be because you hit a bug. It is also possible that this binary

or one of the libraries it was linked against is corrupt, improperly built,

or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see https://mariadb.com/kb/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help

diagnose the problem, but since we have already crashed,

something is definitely wrong and this may fail.

Server version: 10.2.37-MariaDB

key_buffer_size=134217728

read_buffer_size=131072

max_used_connections=1

max_threads=153

thread_count=6

It is possible that mysqld could use up to

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 466068 K  bytes of memory

Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0xcdc006b8

Attempting backtrace. You can use the following information to find out

where mysqld died. If you see no messages after this, something went

terribly wrong...

stack_bottom = 0xdbab42ec thread_stack 0x49000

addr2line: './mariadb-10.2.37-linux-systemd-i686/bin/mysqld': No such file

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(my_print_stacktrace+0x2d)[0x570bcc8d]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(handle_fatal_signal+0x344)[0x56abbc14]

addr2line: 'linux-gate.so.1': No such file

linux-gate.so.1(__kernel_sigreturn+0x0)[0xf7f37570]

addr2line: './mariadb-10.2.37-linux-systemd-i686/bin/mysqld': No such file

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(my_charset_same+0x23)[0x57096fe3]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(_ZN6String16needs_conversionEjPK15charset_info_stS2_Pj+0x3f)[0x5698a45f]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(_ZN6String4copyEPKcjPK15charset_info_stS4_Pj+0x37)[0x5698a687]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(_ZN3THD14convert_stringEP6StringPK15charset_info_stS4_+0x4a)[0x568ceb8a]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(_ZN10Item_param15CONVERSION_INFO7convertEP3THDP6String+0x35)[0x56adb325]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(_ZN10Item_param17convert_str_valueEP3THD+0x56)[0x56adcb66]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(+0x3242d6)[0x5691d2d6]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(_ZN18Prepared_statement14set_parametersEP6StringPhS2_+0x75)[0x56921cb5]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(_ZN18Prepared_statement12execute_loopEP6StringbPhS2_+0x48)[0x56922d88]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(+0x32aa6c)[0x56923a6c]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(_Z19mysqld_stmt_executeP3THDPcj+0x4b)[0x56923bab]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x10c4)[0x56910154]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(_Z10do_commandP3THD+0x150)[0x56912900]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x219)[0x569ee229]

./mariadb-10.2.37-linux-systemd-i686/bin/mysqld(handle_one_connection+0x49)[0x569ee349]

pthread_create.c:0(start_thread)[0xf7e9e648]

:0(__GI___clone)[0xf7b1b74a]