CacheContinuation->timeout->m_ptr is null, then core

Core was generated by `/usr/bin/traffic_server -M --httpport 8080:fd=12,80:fd=15'.
Program terminated with signal 11, Segmentation fault.
#0  0x00002b58f03cc080 in ?? ()
Missing separate debuginfos, use: debuginfo-install expat-2.0.1-9.1.el6.x86_64 glibc-2.12-1.47.el6.x86_64 keyutils-libs-1.4-3.el6.x86_64 krb5-libs-1.9-22.el6.x86_64 libcom_err-1.41.12-11.el6.x86_64 libgcc-4.4.6-3.el6.x86_64 libselinux-2.0.94-5.2.el6.x86_64 libstdc++-4.4.6-3.el6.x86_64 ncurses-libs-5.7-3.20090208.el6.x86_64 openssl-1.0.0-20.el6.x86_64 pcre-7.8-3.1.el6.x86_64 readline-6.0-3.el6.x86_64 tcl-8.5.7-6.el6.x86_64 xz-libs-4.999.9-0.3.beta.20091007git.el6.x86_64 zlib-1.2.3-27.el6.x86_64
#0  0x00002b58f03cc080 in ?? ()
#1  0x0000000000647db6 in CacheContinuation::remoteOpEvent (this=0x2b58d9803000, event_code=1151, e=0x2b58f0323380)
    at ClusterCache.cc:2289
#2  0x00000000004e6e02 in Continuation::handleEvent (this=0x2b58d9803000, event=1151, data=0x2b58f0323380)
    at ../iocore/eventsystem/I_Continuation.h:146
#3  0x0000000000647280 in cache_op_result_ClusterFunction (ch=0x2b58d922fbd0, d=0x2b58f0323318, l=28) at ClusterCache.cc:2088
#4  0x00000000006513a0 in ClusterHandler::process_incoming_callouts (this=0x2b58d922fbd0, m=0x2b59d801b4a0)
    at ClusterHandler.cc:1215
#5  0x000000000065963f in ClusterCalloutContinuation::CalloutHandler (this=0x2b59d001bf60, event=2, e=0x2b58f00031e0)
    at ClusterHandlerBase.cc:62
#6  0x00000000004e6e02 in Continuation::handleEvent (this=0x2b59d001bf60, event=2, data=0x2b58f00031e0)
    at ../iocore/eventsystem/I_Continuation.h:146
#7  0x00000000006d95be in EThread::process_event (this=0x2b58b99c6010, e=0x2b58f00031e0, calling_code=2)
    at UnixEThread.cc:142
#8  0x00000000006d98d9 in EThread::execute (this=0x2b58b99c6010) at UnixEThread.cc:221
#9  0x00000000006d8887 in spawn_thread_internal (a=0x22a6970) at Thread.cc:88
#10 0x00000030308077f1 in start_thread () from /lib64/libpthread.so.0
#11 0x00000030304e570d in clone () from /lib64/libc.so.6
(gdb) f 1
#1  0x0000000000647db6 in CacheContinuation::remoteOpEvent (this=0x2b58d9803000, event_code=1151, e=0x2b58f0323380)
    at ClusterCache.cc:2289
/usr/src/debug/trafficserver-3.2.0/iocore/cluster/ClusterCache.cc:2289:77022:beg:0x647db6
(gdb) l
2284      case CACHE_EVENT_RESPONSE_MSG:{
2285
2286          // the response has arrived, cancel timeout
2287
2288          if (timeout) {
2289            timeout->cancel();
2290            timeout = 0;
2291          }
2292          // remove from the pending queue
2293          unsigned int hash = FOLDHASH(target_ip, seq_number);
(gdb) p timeout
$1 = (Event *) 0x2b58e8008c70
(gdb) p *timeout
$2 = {<Action> = {_vptr.Action = 0x2b5a0c0022a0, continuation = 0x2b58d97fd600, mutex = {m_ptr = 0x0}, cancelled = 0}, 
  ethread = 0x2b58b94c1010, in_the_prot_queue = 0, in_the_priority_queue = 0, immediate = 0, globally_allocated = 1, 
  in_heap = 9, callback_event = 2, timeout_at = 1349964312579683000, period = 0, cookie = 0x0, link = {<SLink<Event>> = {
      next = 0x0}, prev = 0x0}}