Customer reported mysqld crash backtrace in mysqld.err log.
They provided
mysqld.err and columnstoreSupportReport

Here is the top part of the backtrace

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 = 0x7f3fb7beec68 thread_stack 0x80000

• • • buffer overflow detected ***: /usr/local/mariadb/columnstore/mysql//bin/mysqld terminated
      ======= Backtrace: =========
      /lib64/libc.so.6(__fortify_fail+0x37)[0x7f7f7fbc59e7]
      /lib64/libc.so.6(+0x115b62)[0x7f7f7fbc3b62]
      /lib64/libc.so.6(+0x117947)[0x7f7f7fbc5947]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(my_addr_resolve+0xda)[0x5636d8cb25fa]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(my_print_stacktrace+0x1aa)[0x5636d8ca070a]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(handle_fatal_signal+0x33f)[0x5636d87e00bf]
      /lib64/libpthread.so.0(+0xf5d0)[0x7f7f817e55d0]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(_ZN4JOIN21make_aggr_tables_infoEv+0x10a0)[0x5636d867cb50]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(_ZN4JOIN15optimize_stage2Ev+0xc1)[0x5636d86825b1]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(_ZN4JOIN14optimize_innerEv+0xf3e)[0x5636d86858ae]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(_ZN4JOIN8optimizeEv+0x2f)[0x5636d86871cf]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x138)[0x5636d8688898]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x1bb)[0x5636d86894db]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(_Z21mysql_execute_commandP3THD+0x6a15)[0x5636d8638b75]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x1d2)[0x5636d8639ad2]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x225d)[0x5636d863f35d]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(_Z10do_commandP3THD+0xd8)[0x5636d863f9b8]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(_Z11tp_callbackP13TP_connection+0xbf)[0x5636d873a73f]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(+0x71636e)[0x5636d87b836e]
      /usr/local/mariadb/columnstore/mysql//bin/mysqld(+0xbc2d74)[0x5636d8c64d74]
      /lib64/libpthread.so.0(+0x7dd5)[0x7f7f817dddd5]
      /lib64/libc.so.6(clone+0x6d)[0x7f7f7fbabead]