CREATE USER 'list_processes_test'@'localhost' IDENTIFIED BY 'test';

GRANT ALL PRIVILEGES ON *.* TO 'list_processes_test'@'localhost';

$ gcc -ggdb $(mariadb_config --include --libs) ./test_list_processes.c

$ gdb ./a.out

...

(gdb) run

Program received signal SIGSEGV, Segmentation fault.

unpack_fields (data=0x62c390, alloc=alloc@entry=0x623d70, fields=fields@entry=9, default_value=default_value@entry=0 '\000', long_flag_protocol=<optimized out>)

    at /usr/src/debug/MariaDB-10.4.11-5/src_0/libmariadb/libmariadb/mariadb_lib.c:808

808         field->charsetnr= uint2korr(p);

Missing separate debuginfos, use: debuginfo-install glibc-2.17-292.el7.x86_64 keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.15.1-34.el7.x86_64 libcom_err-1.42.9-13.el7.x86_64 libselinux-2.5-14.1.el7.x86_64 openssl-libs-1.0.2k-16.el7_6.1.x86_64 pcre-8.32-17.el7.x86_64 zlib-1.2.7-18.el7.x86_64

(gdb) bt

#0  unpack_fields (data=0x62c390, alloc=alloc@entry=0x623d70, fields=fields@entry=9, default_value=default_value@entry=0 '\000', long_flag_protocol=<optimized out>)

    at /usr/src/debug/MariaDB-10.4.11-5/src_0/libmariadb/libmariadb/mariadb_lib.c:808

#1  0x00007ffff7ba8d22 in mysql_list_processes (mysql=0x623a70) at /usr/src/debug/MariaDB-10.4.11-5/src_0/libmariadb/libmariadb/mariadb_lib.c:2555

#2  0x00000000004008ac in list_processes (conn=0x623a70) at ./test_list_processes.c:12

#3  0x00000000004009ab in main (argc=1, argv=0x7fffffffe558) at ./test_list_processes.c:36