CREATE USER w/o IDENTIFIED BY clause causes crash when using cracklib plugin

MariaDB [(none)]> select @@version;

+----------------------------+

| @@version                  |

+----------------------------+

| 10.1.13-MariaDB-enterprise |

+----------------------------+

1 row in set (0.00 sec)

MariaDB [(none)]> create user 'newuser'@'localhost';

ERROR 2013 (HY000): Lost connection to MySQL server during query

stack_bottom = 0x7f2c0db45130 thread_stack 0x48400

/usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x559d73ee270e]

/usr/sbin/mysqld(handle_fatal_signal+0x38d)[0x559d73a0eb2d]

/lib64/libpthread.so.0(+0xf100)[0x7f2c0d824100]

/lib64/libc.so.6(+0x155c3c)[0x7f2c0ba93c3c]

/lib64/libcrack.so.2(FascistCheckUser+0x47)[0x7f2c0d1e77e7]

mysys/stacktrace.c:247(my_print_stacktrace)[0x559d73ea922c]

sql/signal_handler.cc:160(handle_fatal_signal)[0x559d73821676]

sql/sql_plugin.cc:2369(plugin_foreach_with_mask(THD*, char (*)(THD*, st_plugin_int*, void*), int, unsigned int, void*))[0x559d7389eb36]

sql/sql_acl.cc:904(validate_password)[0x559d738283eb]

sql/sql_acl.cc:9499(mysql_create_user(THD*, List<st_lex_user>&, bool))[0x559d7383217f]

sql/sql_parse.cc:4620(mysql_execute_command(THD*))[0x559d7388f9f1]

sql/sql_parse.cc:7305(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x559d738963ae]

sql/sql_parse.cc:1486(dispatch_command(enum_server_command, THD*, char*, unsigned int))[0x559d7389986b]

sql/sql_parse.cc:1109(do_command(THD*))[0x559d7389a0e9]

sql/sql_connect.cc:1349(do_handle_one_connection(THD*))[0x559d7395d59a]

sql/sql_connect.cc:1263(handle_one_connection)[0x559d7395d770]

/lib64/libpthread.so.0(+0x7dc5)[0x7f2c0d81cdc5]

/lib64/libc.so.6(clone+0x6d)[0x7f2c0ba3428d]