Heres the whole shebang:

[root@client03 shehjart]# /data/shehjart/glusterfsd/sbin/glusterfs -f /data/shehjart/dist-repl.vol -l /data/shehjart/client.log -L DEBUG  --volume repl1-wb --no-daemon /data/shehjart/mount
Segmentation fault (core dumped)
[root@client03 shehjart]# gdb /data/shehjart/glusterfsd/sbin/glusterfs core.17920 
GNU gdb Red Hat Linux (6.5-37.el5rh)
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This GDB was configured as "x86_64-redhat-linux-gnu"...Using host libthread_db library "/lib64/libthread_db.so.1".

Reading symbols from /data/shehjart/glusterfsd/lib/libglusterfs.so.0...done.
Loaded symbols for /data/shehjart/glusterfsd//lib/libglusterfs.so.0
Reading symbols from /lib64/libdl.so.2...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /lib64/libpthread.so.0...done.
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/libc.so.6...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /data/shehjart/glusterfsd/lib/glusterfs/2.0.0git/xlator/protocol/client.so...done.
Loaded symbols for /data/shehjart/glusterfsd//lib/glusterfs/2.0.0git/xlator/protocol/client.so
Reading symbols from /data/shehjart/glusterfsd/lib/glusterfs/2.0.0git/xlator/cluster/replicate.so...done.
Loaded symbols for /data/shehjart/glusterfsd//lib/glusterfs/2.0.0git/xlator/cluster/replicate.so
Reading symbols from /data/shehjart/glusterfsd/lib/glusterfs/2.0.0git/xlator/performance/write-behind.so...done.
Loaded symbols for /data/shehjart/glusterfsd//lib/glusterfs/2.0.0git/xlator/performance/write-behind.so
Reading symbols from /data/shehjart/glusterfsd/lib/glusterfs/2.0.0git/xlator/cluster/distribute.so...done.
Loaded symbols for /data/shehjart/glusterfsd//lib/glusterfs/2.0.0git/xlator/cluster/distribute.so
Reading symbols from /data/shehjart/glusterfsd/lib/glusterfs/2.0.0git/xlator/performance/io-threads.so...done.
Loaded symbols for /data/shehjart/glusterfsd//lib/glusterfs/2.0.0git/xlator/performance/io-threads.so
Reading symbols from /data/shehjart/glusterfsd/lib/glusterfs/2.0.0git/xlator/performance/read-ahead.so...done.
Loaded symbols for /data/shehjart/glusterfsd//lib/glusterfs/2.0.0git/xlator/performance/read-ahead.so
Reading symbols from /data/shehjart/glusterfsd/lib/glusterfs/2.0.0git/xlator/mount/fuse.so...done.
Loaded symbols for /data/shehjart/glusterfsd//lib/glusterfs/2.0.0git/xlator/mount/fuse.so
Reading symbols from /usr/lib64/libfuse.so.2...Reading symbols from /usr/lib/debug/usr/lib64/libfuse.so.2.7.4.debug...done.
done.
Loaded symbols for /usr/lib64/libfuse.so.2
Reading symbols from /lib64/librt.so.1...done.
Loaded symbols for /lib64/librt.so.1
Reading symbols from /data/shehjart/glusterfsd/lib/glusterfs/2.0.0git/transport/socket.so...done.
Loaded symbols for /data/shehjart/glusterfsd//lib/glusterfs/2.0.0git/transport/socket.so
Reading symbols from /lib64/libnss_files.so.2...done.
Loaded symbols for /lib64/libnss_files.so.2
Reading symbols from /lib64/libgcc_s.so.1...done.
Loaded symbols for /lib64/libgcc_s.so.1
Core was generated by `/data/shehjart/glusterfsd/sbin/glusterfs -f /data/shehjart/dist-repl.vol -l /da'.
Program terminated with signal 11, Segmentation fault.
#0  0x00002b1db2c87c6f in dht_notify (this=0x1852bc00, event=5, data=0x1852a790)
    at dht-common.c:3638
3638			conf->gen++;
(gdb) bt
#0  0x00002b1db2c87c6f in dht_notify (this=0x1852bc00, event=5, data=0x1852a790)
    at dht-common.c:3638
#1  0x00002b1db2c87f5c in notify (this=0x1852bc00, event=5, data=0x1852a790) at dht.c:44
#2  0x00002b1db1b49044 in default_notify (this=0x1852a790, event=5, data=0x18528e60)
    at defaults.c:1479
#3  0x00002b1db282d88c in notify (this=0x1852a790, event=5, data=0x18528e60) at afr.c:2201
#4  0x00002b1db2614945 in client_setvolume_cbk (frame=0x18537390, hdr=0x18537430, hdrlen=155, 
    iobuf=0x0) at client-protocol.c:5561
#5  0x00002b1db2615151 in protocol_client_interpret (this=0x18528e60, trans=0x185303e0, 
    hdr_p=0x18537430 "", hdrlen=155, iobuf=0x0) at client-protocol.c:5883
#6  0x00002b1db2615d28 in protocol_client_pollin (this=0x18528e60, trans=0x185303e0)
    at client-protocol.c:6165
#7  0x00002b1db2615ebc in notify (this=0x18528e60, event=2, data=0x185303e0)
    at client-protocol.c:6209
#8  0x00002aaaaaaaecde in socket_event_poll_in (this=0x185303e0) at socket.c:713
#9  0x00002aaaaaaaefdc in socket_event_handler (fd=8, idx=1, data=0x185303e0, poll_in=1, 
    poll_out=0, poll_err=0) at socket.c:813
#10 0x00002b1db1b60219 in event_dispatch_epoll_handler (event_pool=0x18524690, events=0x185359e0, 
    i=0) at event.c:804
#11 0x00002b1db1b603ee in event_dispatch_epoll (event_pool=0x18524690) at event.c:867
#12 0x00002b1db1b60704 in event_dispatch (event_pool=0x18524690) at event.c:975
#13 0x000000000040543d in main (argc=11, argv=0x7ffff8f7b858) at glusterfsd.c:1209
(gdb) p conf
$1 = (dht_conf_t *) 0x0
(gdb) 

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

I think this it is crashing because the repl1 volume is a subvolume for both dist-repl volume and repl1-wb volume.