cmds segfault on pdj-fstest (ceph.git unstable)

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hi 

since this morning cmds segfaults on the pdj-fstest. 
(git rev 12798de37169f6561f0dc7643ca626957f7ab37e)

What happend:
<start server with vstart.sh>
<mount>
08:39:08 [  176.460708] ceph: loaded (mon/mds/osd proto 15/32/24, osdmap 5/5 5/5)
08:39:08 [  176.463965] ceph: client4101 fsid a7b6294d-a074-8e0e-2cee-a48fe2f85c86
08:39:08 [  176.464240] ceph: mon1 127.0.0.1:6789 session established
<start pdj-fstest>
08:40:51 [  279.406980] cmds[6675]: segfault at 0 ip 00000000004bddbd sp 00007f6861ba34e0 error 4 in cmds[400000+331000]
08:40:51 [  279.409895] ceph: mds0 127.0.0.1:6802 socket closed
08:40:51 [  279.804386] ceph: mds0 127.0.0.1:6802 connection failed
08:40:52 [  280.804383] ceph: mds0 127.0.0.1:6802 connection failed
08:40:54 [  282.804381] ceph: mds0 127.0.0.1:6802 connection failed
08:40:58 [  286.804387] ceph: mds0 127.0.0.1:6802 connection failed
08:41:06 [  294.804793] ceph: mds0 127.0.0.1:6802 connection failed
<killed pdj-fstest>
08:41:22 [  310.804820] ceph: mds0 127.0.0.1:6802 connection failed
08:41:38 [  326.804288] ceph: mds0 caps stale
08:41:53 [  341.804327] ceph: mds0 caps stale
08:41:54 [  342.804245] ceph: mds0 127.0.0.1:6802 connection failed


the segfault is reproducable on my machine. yesterday 
(git rev  58fe4b8d5441982d0103817666a6d1bfdd8e04cd) this error was not present.


- Thomas

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