[squid-users] squid-3.1.5 core files

Dear squid-list,

i tried to follow the guidelines on http://wiki.squid-cache.org/SquidFaq/BugReporting because i am getting lots of core files.

- squid version : 3.1.5
- OS : Debian GNU/Linux 5.0.5 (lenny) amd64

# ls -lth core
-rw------- 1 proxy proxy 2.1G 2010-07-22 16:59 core

# file core
core: ELF 64-bit LSB core file x86-64, version 1 (SYSV), SVR4-style, from '(squid) -sY -f /etc/squid3/squid-3.1.5.conf'

# gdb /opt/squid-3.1.5/sbin/squid core
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu"...

warning: Can't read pathname for load map: Input/output error.
Reading symbols from /lib/librt.so.1...done.
Loaded symbols for /lib/librt.so.1
Reading symbols from /lib/libpthread.so.0...done.
Loaded symbols for /lib/libpthread.so.0
Reading symbols from /lib/libcrypt.so.1...done.
Loaded symbols for /lib/libcrypt.so.1
Reading symbols from /usr/lib/libssl.so.0.9.8...done.
Loaded symbols for /usr/lib/libssl.so.0.9.8
Reading symbols from /usr/lib/libcrypto.so.0.9.8...done.
Loaded symbols for /usr/lib/libcrypto.so.0.9.8
Reading symbols from /lib/libnsl.so.1...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /usr/lib/libstdc++.so.6...done.
Loaded symbols for /usr/lib/libstdc++.so.6
Reading symbols from /lib/libm.so.6...done.
Loaded symbols for /lib/libm.so.6
Reading symbols from /lib/libgcc_s.so.1...done.
Loaded symbols for /lib/libgcc_s.so.1
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /usr/lib/libz.so.1...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/libnss_compat.so.2...done.
Loaded symbols for /lib/libnss_compat.so.2
Reading symbols from /lib/libnss_nis.so.2...done.
Loaded symbols for /lib/libnss_nis.so.2
Reading symbols from /lib/libnss_files.so.2...done.
Loaded symbols for /lib/libnss_files.so.2
Core was generated by `(squid) -sY -f /etc/squid3/squid-3.1.5.conf'.
Program terminated with signal 6, Aborted.
[New process 1433]
#0 0x00007f61234e6ed5 in raise () from /lib/libc.so.6
(gdb) bt
#0 0x00007f61234e6ed5 in raise () from /lib/libc.so.6
#1 0x00007f61234e83f3 in abort () from /lib/libc.so.6
#2 0x00007f6123d6a294 in __gnu_cxx::__verbose_terminate_handler ()
   from /usr/lib/libstdc++.so.6
#3 0x00007f6123d68696 in ?? () from /usr/lib/libstdc++.so.6
#4 0x00007f6123d686c3 in std::terminate () from /usr/lib/libstdc++.so.6
#5 0x00007f6123d68f6f in __cxa_pure_virtual () from /usr/lib/libstdc++.so.6
#6 0x000000000055a1e0 in JobDialer (this=0x7fffffffcc60, aJob=0x599) at AsyncJob.cc:172
#7 0x00000000005b142d in Adaptation::Initiator::announceInitiatorAbort (this=0xc8e9450,
    x=@0xc8e9480) at ../../src/base/AsyncJobCalls.h:33
#8 0x00000000005b1ad1 in Adaptation::Iterator::noteInitiatorAborted (this=0xc8e9438)
    at Iterator.cc:104
#9 0x000000000055a7db in JobDialer::dial (this=0x6d7cbb20, call=@0x6d7cbaf0)
    at AsyncJob.cc:215
#10 0x0000000000559bdb in AsyncCall::make (this=0x6d7cbaf0) at AsyncCall.cc:34
#11 0x000000000055c270 in AsyncCallQueue::fireNext (this=0xad3000) at AsyncCallQueue.cc:53
#12 0x000000000055c418 in AsyncCallQueue::fire (this=0xad3000) at AsyncCallQueue.cc:39
#13 0x00000000004ca81c in EventLoop::runOnce (this=0x7fffffffce20) at EventLoop.cc:130
#14 0x00000000004ca8f8 in EventLoop::run (this=0x7fffffffce20) at EventLoop.cc:94
#15 0x0000000000513eac in SquidMain (argc=4, argv=0x7fffffffcfc8) at main.cc:1397
#16 0x0000000000514436 in main (argc=1433, argv=0x599) at main.cc:1159
(gdb) quit

What could be the cause and what kind of additional information should I provide for better analysis ?

thanks,

---
Jan