From: Mathew Johnston <johnston@...>
Date: 2003-01-20T03:52:23+09:00
Subject: Re: Segfault


>  Can you try to make a simpler script which exhibit the problem (it's a
>  little complex actually)

Well, I may be able to, but it's difficult to reproduce the problem. The
problem appears to be thread related. I get a different exception each
time, and sometimes a segfault. The exceptions seem to make no sense. For
example, I have a line that calls "Time.now". The line generated the
following exception in one instance:

../prioriline.rb:185:in `initialize': undefined method `now' for
"UNEXPECTED Some packet":String (NameError)
	from ./prioriline.rb:246:in `new'
	from ./prioriline.rb:246:in `initialize' from ./prioriline.rb:245:in
	`initialize' from ./prioriline.rb:245:in `new'
	from ./prioriline.rb:245:in `initialize' from ./prioriline.rb:244:in
	`times'
	from ./prioriline.rb:244:in `initialize' from ./prioriline.rb:327:in
	`new'
	from ./prioriline.rb:327

Please note that the script has changed a little (I've added some
comments) since I posted it, so the line numbers are a little different.
However, the problem persists.

Obviously, I can't, and have not, set "Time" to equal that string. The
string is generated in another part of my program, however.

I'd really like to help to identify the problem in the interpreter, but
I'm not sure how. I have 0 experience debugging C apps. Is there anything
else that I can do? Unfortunately, I will have to rewrite my app in
another language if this can't be fixed (I obviously can't have it
crashing all over the place).

Is there a quick and easy way to see if the problem is in the pcap module
through debugging? It's difficult to make a pcap stub that 'works' to try
to eliminate the pcap module from the equation.

Thanks,
Mat.