Troubleshooting crashing perl app

[markd at macports.org]

I am trying to troubleshoot this problem:

http://www.mail-archive.com/nfdump-discuss@lists.sourceforge.net/msg00162.html

I am trying to run nfsen, which starts up nfcapd and it crashes and lists
the parent process as "perl".  The poster in the nfsen conference says he
finally compiled and installed non-port version of perl and that solved
it, but I don't know how or what options he used.  I tried MacPorts perl
5.8 and 5.10 and also tried +threads and +shared variants to no avail.

Can anyone give a wild guess as to what might be the problem or how I
might troubleshoot this?

Mark

------------------------------------------------------------
Path:            /opt/local/bin/nfcapd
Identifier:      nfcapd
Version:         ??? (???)
Code Type:       X86 (Native)
Parent Process:  perl [3536]

Date/Time:       2008-02-11 11:47:23.120 -0800
OS Version:      Mac OS X 10.5.1 (9B18)
Report Version:  6

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000008
Crashed Thread:  0

Thread 0 Crashed:
0   libSystem.B.dylib                    0x905a6f00 strncpy + 112
1   nfcapd                               0x00001896 start + 54