~/bug_repo/test-10.3$ git log -1

commit 74b35b68744ce552f09124e27ef1785af69d7989 (HEAD -> 10.3)

Author: Andrei Elkin <andrei.elkin@mariadb.com>

Date:   Wed Nov 22 19:34:42 2017 +0200

    MDEV-13073. This part patch weeds out RUN_HOOK from the server as semisync

    is defined statically. Consequently the observer interfaces are removed

    as well.

Thread 1 (Thread 0x7fc2b8512700 (LWP 9572)):

#0  __pthread_kill (threadid=<optimized out>, signo=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:57

#1  0x0000560e50ed4cd8 in my_write_core (sig=6) at /home/sujatha/bug_repo/test-10.3/mysys/stacktrace.c:481

#2  0x0000560e506eb7b1 in handle_fatal_signal (sig=6) at /home/sujatha/bug_repo/test-10.3/sql/signal_handler.cc:303

#3  <signal handler called>

#4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51

#5  0x00007fc2c8254921 in __GI_abort () at abort.c:79

#6  0x00007fc2c824448a in __assert_fail_base (fmt=0x7fc2c83cb750 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x560e50f9a47b "0", file=file@entry=0x560e50f9a320 "/home/sujatha/bug_repo/test-10.3/sql/net_serv.cc", line=line@entry=1163, function=function@entry=0x560e50f9a6e0 <my_real_read(st_net*, unsigned long*, char)::__PRETTY_FUNCTION__> "ulong my_real_read(NET*, size_t*, my_bool)") at assert.c:92

#7  0x00007fc2c8244502 in __GI___assert_fail (assertion=0x560e50f9a47b "0", file=0x560e50f9a320 "/home/sujatha/bug_repo/test-10.3/sql/net_serv.cc", line=1163, function=0x560e50f9a6e0 <my_real_read(st_net*, unsigned long*, char)::__PRETTY_FUNCTION__> "ulong my_real_read(NET*, size_t*, my_bool)") at assert.c:101

#8  0x0000560e5033decd in my_real_read (net=0x7fc25401e7a0, complen=0x7fc2b8511c30, header=0 '\000') at /home/sujatha/bug_repo/test-10.3/sql/net_serv.cc:1163

#9  0x0000560e5033e289 in my_net_read_packet_reallen (net=0x7fc25401e7a0, read_from_server=0 '\000', reallen=0x7fc2b8511d80) at /home/sujatha/bug_repo/test-10.3/sql/net_serv.cc:1340

#10 0x0000560e506a5c27 in cli_safe_read_reallen (mysql=0x7fc25401e7a0, reallen=0x7fc2b8511d80) at /home/sujatha/bug_repo/test-10.3/sql-common/client.c:588

#11 0x0000560e503625be in read_event (mysql=0x7fc25401e7a0, mi=0x560e533bbaf0, suppress_warnings=0x7fc2b8511d4e, network_read_len=0x7fc2b8511d80) at /home/sujatha/bug_repo/test-10.3/sql/slave.cc:3652

#12 0x0000560e50364ff0 in handle_slave_io (arg=0x560e533bbaf0) at /home/sujatha/bug_repo/test-10.3/sql/slave.cc:4769

#13 0x0000560e50e6ea26 in pfs_spawn_thread (arg=0x560e52ea1820) at /home/sujatha/bug_repo/test-10.3/storage/perfschema/pfs.cc:1863

#14 0x00007fc2c8f966db in start_thread (arg=0x7fc2b8512700) at pthread_create.c:463

#15 0x00007fc2c833571f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

sujatha@sujatha:~/bug_repo/test-10.3/bld/mysql-test$ git log -1

commit e972125f11d8f37bc263b113e85ed064257a92ee (HEAD -> 10.3)

Author: Andrei Elkin <andrei.elkin@mariadb.com>

Date:   Wed Nov 22 17:10:34 2017 +0200

sujatha@sujatha:~/bug_repo/test-10.3/bld/mysql-test$ ./mtr rpl_semi_sync_slave_compressed_protocol.test

Logging: /home/sujatha/bug_repo/test-10.3/mysql-test/mysql-test-run.pl  rpl_semi_sync_slave_compressed_protocol.test

vardir: /home/sujatha/bug_repo/test-10.3/bld/mysql-test/var

Checking leftover processes...

Removing old var directory...

Creating var directory '/home/sujatha/bug_repo/test-10.3/bld/mysql-test/var'...

Checking supported features...

MariaDB Version 10.3.3-MariaDB-debug

 - SSL connections supported

 - binaries are debug compiled

Collecting tests...

Installing system database...

==============================================================================

TEST                                      RESULT   TIME (ms) or COMMENT

--------------------------------------------------------------------------

worker[1] Using MTR_BUILD_THREAD 300, with reserved ports 16000..16019

rpl.rpl_semi_sync_slave_compressed_protocol 'row' [ pass ]   3146

--------------------------------------------------------------------------