(gdb) bt

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:56

#1  0x000055a3a3e4603d in my_write_core (sig=sig@entry=6) at /test/10.4_dbg/mysys/stacktrace.c:386

#2  0x000055a3a3655472 in handle_fatal_signal (sig=6) at /test/10.4_dbg/sql/signal_handler.cc:372

#3  <signal handler called>

#4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50

#5  0x000014cb2629c859 in __GI_abort () at abort.c:79

#6  0x000014cb2629c729 in __assert_fail_base (fmt=0x14cb26432588 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x55a3a41332b8 "!(thd->rgi_slave && thd->rgi_slave->did_mark_start_commit)", 

    file=0x55a3a41323f3 "/test/10.4_dbg/sql/handler.cc", line=1906, function=<optimized out>) at assert.c:92

#7  0x000014cb262adfd6 in __GI___assert_fail (assertion=assertion@entry=0x55a3a41332b8 "!(thd->rgi_slave && thd->rgi_slave->did_mark_start_commit)", 

    file=file@entry=0x55a3a41323f3 "/test/10.4_dbg/sql/handler.cc", line=line@entry=1906, function=function@entry=0x55a3a4133240 "int ha_rollback_trans(THD*, bool)") at assert.c:101

#8  0x000055a3a3659af2 in ha_rollback_trans (thd=thd@entry=0x14ca6c000d28, all=all@entry=true) at /test/10.4_dbg/sql/handler.cc:1906

#9  0x000055a3a3516666 in trans_rollback (thd=0x14ca6c000d28) at /test/10.4_dbg/sql/transaction.cc:342

#10 0x000055a3a393098c in Wsrep_client_service::bf_rollback (this=0x14ca6c006da0) at /test/10.4_dbg/include/my_pthread.h:376

#11 0x000055a3a3f7b14a in wsrep::client_state::after_statement (this=this@entry=0x14ca6c006db8) at /test/10.4_dbg/wsrep-lib/src/client_state.cpp:274

#12 0x000055a3a35687c5 in wsrep_after_statement (thd=0x14ca6c000d28) at /test/10.4_dbg/sql/sql_class.h:5041

#13 rpt_handle_event (qev=qev@entry=0x14caf8ccb148, rpt=rpt@entry=0x14caf800d050) at /test/10.4_dbg/sql/rpl_parallel.cc:65

#14 0x000055a3a356c8f0 in handle_rpl_parallel_thread (arg=0x14caf800d050) at /test/10.4_dbg/sql/rpl_parallel.cc:1381

#15 0x000014cb267ad609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#16 0x000014cb26399133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95