UBSAN: runtime error: null pointer passed as argument 2, which is declared to never be null in binlog_defragment

SET @a=NULL;

BINLOG @a,@a;

/test/11.0_dbg_san/sql/sql_binlog.cc:160:11: runtime error: null pointer passed as argument 2, which is declared to never be null

    #0 0x56078f365bde in binlog_defragment(THD*) /test/11.0_dbg_san/sql/sql_binlog.cc:160

    #1 0x56078f368434 in mysql_client_binlog_statement(THD*) /test/11.0_dbg_san/sql/sql_binlog.cc:287

    #2 0x56078ea74061 in mysql_execute_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:5929

    #3 0x56078ea7e973 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.0_dbg_san/sql/sql_parse.cc:8014

    #4 0x56078ea8e707 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1894

    #5 0x56078ea9c542 in do_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1407

    #6 0x56078f4718b5 in do_handle_one_connection(CONNECT*, bool) /test/11.0_dbg_san/sql/sql_connect.cc:1416

    #7 0x56078f472dd0 in handle_one_connection /test/11.0_dbg_san/sql/sql_connect.cc:1318

    #8 0x14df32e94b42 in start_thread nptl/pthread_create.c:442

    #9 0x14df32f269ff  (/lib/x86_64-linux-gnu/libc.so.6+0x1269ff)

Compiled with GCC >=7.5.0 (I use GCC 11.3.0) and:

    -DWITH_ASAN=ON -DWITH_ASAN_SCOPE=ON -DWITH_UBSAN=ON -DWITH_RAPID=OFF -DWSREP_LIB_WITH_ASAN=ON

Set before execution:

    export UBSAN_OPTIONS=print_stacktrace=1