Description of problem:
Mariadb server segfaults when it is configured to enable Galera replication.


Version-Release number of selected component (if applicable):
mariadb-10.1.14-1.fc24.x86_64

How reproducible:
always

Steps to Reproduce:
1. Ensure that mysql has created files on disk, create it otherwise

   mysql_install_db
   chmod -R mysql. /var/lib/mysql
   
2. Enable galera by ensuring the following variable are set in /etc/my.cnf.d/mariadb-server.cnf

    [galera]
    # Mandatory settings
    wsrep_on=ON
    wsrep_provider=/usr/lib64/galera/libgalera_smm.so
    wsrep_cluster_address=gcomm://
    wsrep_cluster_name=galera
    binlog_format=row
    default_storage_engine=InnoDB
    innodb_autoinc_lock_mode=2

3. Start a new galera cluster

    [root@fedora ~]# mysqld_safe --wsrep-new-cluster

Actual results:
mysqld segfaults and mysqld_safe exit in error

    160705 12:34:43 mysqld_safe Logging to '/var/log/mariadb/mariadb.log'.
    160705 12:34:43 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
    160705 12:34:43 mysqld_safe WSREP: Running position recovery with --log_error='/var/lib/mysql/wsrep_recovery.X8ZxeH' --pid-file='/var/lib/mysql/fedora2.localdomain-recover.pid'
    160705 12:34:46 mysqld_safe WSREP: Recovered position 00000000-0000-0000-0000-000000000000:-1
    /usr/bin/mysqld_safe: line 188:  1799 Segmentation fault      (core dumped) nohup /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --wsrep_provider=/usr/lib64/galera/libgalera_smm.so --wsrep-new-cluster --log-error=/var/log/mariadb/mariadb.log --pid-file=/var/run/mariadb/mariadb.pid --socket=/var/lib/mysql/mysql.sock --wsrep_start_position=00000000-0000-0000-0000-000000000000:-1 < /dev/null >> /var/log/mariadb/mariadb.log 2>&1
    160705 12:34:46 mysqld_safe mysqld from pid file /var/run/mariadb/mariadb.pid ended

A stack trace is dumped in /var/log/mariadb/mariadb.log:

   Attempting backtrace. You can use the following information to find out
    where mysqld died. If you see no messages after this, something went
    terribly wrong...
    2016-07-05 12:34:46 139974166951680 [Note] WSREP: Member 0.0 () synced with group.
    2016-07-05 12:34:46 139974166951680 [Note] WSREP: Shifting JOINED -> SYNCED (TO: 0)
    stack_bottom = 0x7f4e54072d18 thread_stack 0x48400
    /usr/libexec/mysqld(my_print_stacktrace+0x2e)[0x565322e6f39e]
    /usr/libexec/mysqld(handle_fatal_signal+0x3f5)[0x5653229b4d25]
    /lib64/libpthread.so.0(+0x10c10)[0x7f4e5a210c10]
    /usr/libexec/mysqld(+0x53928e)[0x56532295328e]
    /usr/lib64/galera/libgalera_smm.so(_ZN6galera13ReplicatorSMM19process_conf_changeEPvRK15wsrep_view_infoiNS_10Replicator5StateEl+0x38a)[0x7f4e553e178a]
    /usr/lib64/galera/libgalera_smm.so(_ZN6galera15GcsActionSource8dispatchEPvRK10gcs_actionRb+0x54b)[0x7f4e553baa7b]
    /usr/lib64/galera/libgalera_smm.so(_ZN6galera15GcsActionSource7processEPvRb+0x76)[0x7f4e553bc166]
    /usr/lib64/galera/libgalera_smm.so(_ZN6galera13ReplicatorSMM10async_recvEPv+0x86)[0x7f4e553e0f46]
    /usr/lib64/galera/libgalera_smm.so(galera_recv+0x2e)[0x7f4e553fb61e]
    /usr/libexec/mysqld(+0x5483f7)[0x5653229623f7]
    /usr/libexec/mysqld(start_wsrep_THD+0x484)[0x565322951ef4]
    /lib64/libpthread.so.0(+0x75ba)[0x7f4e5a2075ba]
    /lib64/libc.so.6(clone+0x6d)[0x7f4e5871a7cd]

Expected results:
mysqld should keep running, a new galera cluster should be available.
Checking that galera is started would require running the following:

[root@fedora ~]# mysql -e "show status like 'wsrep_cluster%';"
+--------------------------+--------------------------------------+
| Variable_name            | Value                                |
+--------------------------+--------------------------------------+
| wsrep_cluster_conf_id    | 1                                    |
| wsrep_cluster_size       | 1                                    |
| wsrep_cluster_state_uuid | c2f94f44-3fce-11e6-a869-17918323b495 |
| wsrep_cluster_status     | Primary                              |
+--------------------------+--------------------------------------+
 

Additional info:
As reported upstream [1,2] the segfault seems to be related to a bug which is triggered when compiling with gcc 6.0 (or gcc5.x --std=c++11)

[1] https://jira.mariadb.org/browse/MDEV-10335
[2] https://github.com/codership/mysql-wsrep/issues/267