$ perl ./mtr innodb.innodb-blob --ps-protocol

...

Thread 1 (Thread 0x7f898fe20740 (LWP 29514)):

#0  0x00007f898f5c8101 in __pthread_kill (threadid=<optimized out>, signo=11) at ../nptl/sysdeps/unix/sysv/linux/pthread_kill.c:61

#1  0x00007f898fa89344 in my_write_core (sig=11) at /data/src/10.1/mysys/stacktrace.c:477

#2  0x00007f898fa4ae63 in signal_handler (sig=11) at /data/src/10.1/client/mysqltest.cc:8817

#3  <signal handler called>

#4  0x00007f898fa852cf in vio_description (vio=0x0) at /data/src/10.1/vio/viosocket.c:640

#5  0x00007f898fa630b8 in cli_safe_read (mysql=0x7f899168a480) at /data/src/10.1/sql-common/client.c:585

#6  0x00007f898fa6abb9 in cli_read_query_result (mysql=0x7f899168a480) at /data/src/10.1/sql-common/client.c:3993

#7  0x00007f898fa5f53b in mysql_read_query_result (mysql=0x7f899168a480) at /data/src/10.1/libmysql/libmysql.c:4908

#8  0x00007f898fa39793 in wrap_mysql_read_query_result (mysql=0x7f899168a480) at /data/src/10.1/client/../tests/nonblock-wrappers.h:360

#9  0x00007f898fa48c28 in run_query_normal (cn=0x7f8991685670, command=0x7f89916d8bd0, flags=2, query=0x7f89916d8d50 "reap", query_len=4, ds=0x7f8990008860 <ds_res>, ds_warnings=0x7ffc08f2c7a0) at /data/src/10.1/client/mysqltest.cc:7763

#10 0x00007f898fa4a4ac in run_query (cn=0x7f8991685670, command=0x7f89916d8bd0, flags=2) at /data/src/10.1/client/mysqltest.cc:8526

#11 0x00007f898fa4c1cc in main (argc=13, argv=0x7ffc08f2cb98) at /data/src/10.1/client/mysqltest.cc:9306