I built a pre-rc rpms for UCSD XCache installation and got 6 crashes over night (on 10 moderatly loaded servers). E.g.:
```
-rw-------. 1 nobody nobody 5433417728 Mar 21 07:40 core-xcache-00.t2.ucsd.edu-xrootd.31250
Program terminated with signal 11, Segmentation fault.
#0 0x0000000000000045 in ?? ()
(gdb) bt
#0 0x0000000000000045 in ?? ()
#1 0x00007fbd34750387 in ~XRootDMsgHandler (this=0x7fbb5403a3c0, __in_chrg=<optimized out>)
at /usr/src/debug/xrootd/xrootd/src/XrdCl/XrdClXRootDMsgHandler.hh:154
#2 XrdCl::XRootDMsgHandler::~XRootDMsgHandler (this=0x7fbb5403a3c0, __in_chrg=<optimized out>)
at /usr/src/debug/xrootd/xrootd/src/XrdCl/XrdClXRootDMsgHandler.hh:158
#3 0x00007fbd3474a2d7 in XrdCl::XRootDMsgHandler::HandleResponse (this=0x7fbb5403a3c0)
at /usr/src/debug/xrootd/xrootd/src/XrdCl/XrdClXRootDMsgHandler.cc:1179
#4 0x00007fbd3475269d in XrdCl::HandleRspJob::Run (this=0x7fba9c170880, arg=<optimized out>)
at /usr/src/debug/xrootd/xrootd/src/XrdCl/XrdClXRootDMsgHandler.cc:92
#5 0x00007fbd34796b9f in XrdCl::JobManager::RunJobs (this=0x7fbd20003820)
at /usr/src/debug/xrootd/xrootd/src/XrdCl/XrdClJobManager.cc:148
#6 0x00007fbd34796df9 in RunRunnerThread (arg=<optimized out>)
at /usr/src/debug/xrootd/xrootd/src/XrdCl/XrdClJobManager.cc:33
#7 0x00007fbd387fce25 in start_thread (arg=0x7fbd316e3700) at pthread_create.c:308
#8 0x00007fbd37affbad in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) up
#1 0x00007fbd34750387 in ~XRootDMsgHandler (this=0x7fbb5403a3c0, __in_chrg=<optimized out>)
at /usr/src/debug/xrootd/xrootd/src/XrdCl/XrdClXRootDMsgHandler.hh:154
154 delete pResponse;
(gdb) p pResponse
$1 = (XrdCl::Message *) 0x7fba9c14d410
(gdb) p *pResponse
$2 = {<XrdCl::Buffer> = {_vptr.Buffer = 0x7fba9c0c90b0, pBuffer = 0x14 <Address 0x14 out of bounds>,
pSize = 4294967295, pCursor = 0}, pIsMarshalled = 91, pSessionId = 7286952176027660115,
pDescription = <error reading variable: Cannot access memory at address 0x7f00726f725a>}
```
Oh, I was actually cheating and really built master ... will try building off 4.9.x branch now.
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