Thanks for the tip, pemungkah!

The other problem is how to get the -d:Trace option to work under mod_perl.

Here's how to do it:

Add the following section to httpd.conf:

   <Perl>
       $Devel::Trace::TRACE = 0;
   </Perl>
[download]

And start the server like this:

    $ PERL5OPT=-d:Trace sudo /etc/init.d/httpd restart
[download]

Then in your code you can write:

   $Devel::Trace::TRACE = 1;
   # some buggy code
   $Devel::Trace::TRACE = 0;
[download]

Problems:

• Server spits out a mess of trace info before $TRACE is set to 0
• Trace info (and there's a lot of it) goes to the error log, which is hard to manage

I think I'll try making a patch to allow turning off $TRACE via the command line, and to allow sending the trace info to a different file.

Michael