audit plugin + MB collation connection + PREPARE stmt parse error crash | handle_fatal_signal (sig=11) in read_token from digest_add_token

(gdb) bt
#0 0x00007fb82c852741 in __pthread_kill (threadid=<optimized out>, signo=11) at ../nptl/sysdeps/unix/sysv/linux/pthread_kill.c:61
#1 0x0000000000ac6ee2 in my_write_core (sig=11) at /git/PS-5.6.36_dbg/mysys/stacktrace.c:424
#2 0x00000000007387a3 in handle_fatal_signal (sig=11) at /git/PS-5.6.36_dbg/sql/signal_handler.cc:236
#3 <signal handler called>
#4 0x00000000007b7bcb in read_token (digest_storage=0x7fb82ce3cf88, index=4294967294, tok=0x7fb82ce3a01c)
    at /git/PS-5.6.36_dbg/sql/sql_digest.cc:70
#5 0x00000000007b79e0 in digest_add_token (state=0x7fb82ce3cf80, token=0, yylval=0x7fb82ce3afe0)
    at /git/PS-5.6.36_dbg/sql/sql_digest.cc:603
#6 0x00000000007d8279 in Lex_input_stream::add_digest_token (this=0x7fb82ce3d068, token=0, yylval=0x7fb82ce3afe0)
    at /git/PS-5.6.36_dbg/sql/sql_lex.cc:393
#7 0x00000000007d967b in MYSQLlex (yylval=0x7fb82ce3afe0, thd=0x7fb801b4c000) at /git/PS-5.6.36_dbg/sql/sql_lex.cc:988
#8 0x00000000008ec765 in MYSQLparse (YYTHD=0x7fb801b4c000) at /git/PS-5.6.36_dbg/sql/sql_yacc.cc:18959
#9 0x00000000007fc560 in parse_sql (thd=0x7fb801b4c000, parser_state=0x7fb82ce3d060, creation_ctx=0x0)
    at /git/PS-5.6.36_dbg/sql/sql_parse.cc:9091
#10 0x000000000080f8a5 in Prepared_statement::prepare (this=0x7fb7b4c89280, packet=0x7fb7b4c1f120 "", packet_len=8)
    at /git/PS-5.6.36_dbg/sql/sql_prepare.cc:3754
#11 0x000000000080ca71 in mysql_sql_stmt_prepare (thd=0x7fb801b4c000) at /git/PS-5.6.36_dbg/sql/sql_prepare.cc:2554
#12 0x00000000007ed71e in mysql_execute_command (thd=0x7fb801b4c000) at /git/PS-5.6.36_dbg/sql/sql_parse.cc:3060
#13 0x00000000007f81fc in mysql_parse (thd=0x7fb801b4c000,
    rawbuf=0x7fb7b4c1f010 "PREPARE create_zip_dict_stmt FROM @create_zip_dict_sql", length=54, parser_state=0x7fb82ce3e4f0)
    at /git/PS-5.6.36_dbg/sql/sql_parse.cc:7058
#14 0x00000000007e9d0e in dispatch_command (command=COM_QUERY, thd=0x7fb801b4c000,
    packet=0x7fb7f47dc001 "PREPARE create_zip_dict_stmt FROM @create_zip_dict_sql", packet_length=54)
    at /git/PS-5.6.36_dbg/sql/sql_parse.cc:1485
#15 0x00000000007e8b0c in do_command (thd=0x7fb801b4c000) at /git/PS-5.6.36_dbg/sql/sql_parse.cc:1062
#16 0x00000000007aff9f in do_handle_one_connection (thd_arg=0x7fb801b4c000) at /git/PS-5.6.36_dbg/sql/sql_connect.cc:1550
#17 0x00000000007afca6 in handle_one_connection (arg=0x7fb801b4c000) at /git/PS-5.6.36_dbg/sql/sql_connect.cc:1454
#18 0x0000000000b15be1 in pfs_spawn_thread (arg=0x7fb80fbfb6a0) at /git/PS-5.6.36_dbg/storage/perfschema/pfs.cc:1860
#19 0x00007fb82c84ddc5 in start_thread (arg=0x7fb82ce3f700) at pthread_create.c:308
#20 0x00007fb82aca873d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

DROP DATABASE test;
INSTALL PLUGIN QUERY_RESPONSE_TIME_AUDIT SONAME 'query_response_time.so';
SET collation_connection='ucs2_general_ci';
PREPARE create_zip_dict_stmt FROM @create_zip_dict_sql;