The bug is reproducible:

CREATE DATABASE `test` /*!40100 COLLATE 'utf8_general_ci' */;
USE `test`;
CREATE TABLE `t1` (
`c1` INT NULL
)
COLLATE='utf8_general_ci'
;
SET STATEMENT max_statement_time=900 FOR LOCK TABLES `t1` WRITE

190719 20:17:34 [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: 10.4.6-MariaDB-1:10.4.6+maria~bionic-log
key_buffer_size=8388608
read_buffer_size=393216
max_used_connections=3
max_threads=82
thread_count=10
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 713412 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x7f0fe0000c08
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 = 0x7f11a0744dd8 thread_stack 0x40000
/usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x55afef2d9e0e]
/usr/sbin/mysqld(handle_fatal_signal+0x515)[0x55afeed52f95]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x12890)[0x7f11a7ffa890]
/usr/sbin/mysqld(_ZN13st_select_lex17add_table_to_listEP3THDP11Table_identP25st_mysql_const_lex_stringm13thr_lock_type13enum_mdl_typeP4ListI10Index_hintEPS8_I6StringEP19st_mysql_lex_string+0x214)[0x55afeeb3eb04]
/usr/sbin/mysqld(_Z10MYSQLparseP3THD+0xa569)[0x55afeece77a9]
/usr/sbin/mysqld(_Z9parse_sqlP3THDP12Parser_stateP19Object_creation_ctxb+0x13d)[0x55afeeb42a5d]
/usr/sbin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x146)[0x55afeeb4b636]
/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x166d)[0x55afeeb4dedd]
/usr/sbin/mysqld(_Z10do_commandP3THD+0x148)[0x55afeeb4f348]
/usr/sbin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x2c2)[0x55afeec2a542]
/usr/sbin/mysqld(handle_one_connection+0x3d)[0x55afeec2a60d]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76db)[0x7f11a7fef6db]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x3f)[0x7f11a73ed88f]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7f0fe0010000): SET STATEMENT max_statement_time=900 FOR LOCK TABLES `t1` WRITE
Connection ID (thread ID): 14
Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on

The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
Writing a core file...
Working directory at /var/lib/mysql/sw21dev
Resource Limits:
Limit Soft Limit Hard Limit Units
Max cpu time unlimited unlimited seconds
Max file size unlimited unlimited bytes
Max data size unlimited unlimited bytes
Max stack size 8388608 unlimited bytes
Max core file size 0 unlimited bytes
Max resident set unlimited unlimited bytes
Max processes 31664 31664 processes
Max open files 16364 16364 files
Max locked memory 16777216 16777216 bytes
Max address space unlimited unlimited bytes
Max file locks unlimited unlimited locks
Max pending signals 31664 31664 signals
Max msgqueue size 819200 819200 bytes
Max nice priority 0 0
Max realtime priority 0 0
Max realtime timeout unlimited unlimited us
Core pattern: |/usr/share/apport/apport %p %s %c %d %P