Comment 1 for bug 1664302

He added another core dump:

OK, I have another crash, this time no other circumstances involved (it's on the second PC, no problems with ulimit for sure), just regular operation of the system.
It's in another place, but I'm adding it here, because it also has udpiiu in it:

Program terminated with signal 11, Segmentation fault.
#0 add (this=0xe0fc60, cid=<value optimized out>, sid=168846180, typeCode=65535, count=<value optimized out>, minorVersionNumber=<value optimized out>, addr=...,
    currentTime=...) at ../../../include/tsDLList.h:322
322 lastNode.pNext = &item;
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.192.el6.x86_64 libgcc-4.4.7-17.el6.x86_64 libstdc++-4.4.7-17.el6.x86_64 ncurses-libs-5.7-4.20090207.el6.x86_64
(gdb) bt
#0 add (this=0xe0fc60, cid=<value optimized out>, sid=168846180, typeCode=65535, count=<value optimized out>, minorVersionNumber=<value optimized out>, addr=...,
    currentTime=...) at ../../../include/tsDLList.h:322
#1 cac::transferChanToVirtCircuit (this=0xe0fc60, cid=<value optimized out>, sid=168846180, typeCode=65535, count=<value optimized out>,
    minorVersionNumber=<value optimized out>, addr=..., currentTime=...) at ../cac.cpp:616
#2 0x00007f434cc014a0 in udpiiu::searchRespAction (this=<value optimized out>, msg=<value optimized out>, addr=<value optimized out>, currentTime=<value optimized out>)
    at ../udpiiu.cpp:690
#3 0x00007f434cc015c2 in udpiiu::postMsg (this=0xe7cc80, net_addr=..., pInBuf=<value optimized out>, blockSize=24, currentTime=...) at ../udpiiu.cpp:857
#4 0x00007f434cc03681 in udpRecvThread::run (this=0xe8d0a8) at ../udpiiu.cpp:394
#5 0x00007f434c9a4249 in epicsThreadCallEntryPoint (pPvt=0xe8d0c8) at ../../../src/libCom/osi/epicsThread.cpp:83
#6 0x00007f434c9aaed3 in start_routine (arg=0xe8d340) at ../../../src/libCom/osi/os/posix/osdThread.c:389
#7 0x00000030ada07aa1 in start_thread () from /lib64/libpthread.so.0
#8 0x00000030ad2e8aad in clone () from /lib64/libc.so.6

I also have another core still to be examined.