perlbug - how to submit bug reports on Perl
perlbug [ -v ] [ -a address ] [ -s subject ] [ -b body | -f file ] [ -r returnaddress ] [ -e editor ] [ -c adminaddress | -C ] [ -S ] [ -t ] [ -d ] [ -h ]
A program to help generate bug reports about perl or the modules that come with it, and mail them.
If you have found a bug with a non-standard port (one that was not part of the standard distribution), a binary distribution, or a non-standard module (such as Tk, CGI, etc), then please see the documentation that came with that distribution to determine the correct place to report bugs.
perlbug is designed to be used interactively.
Normally no arguments will be needed.
Simply run it,
and follow the prompts.
If you are unable to run perlbug (most likely because you don't have a working setup to send mail that perlbug recognizes), you may have to compose your own report, and email it to email@example.com. You might find the -d option useful to get summary information in that case.
In any case, when reporting a bug, please make sure you have run through this checklist:
perl -v at the command line to find out.
Look at http://www.perl.com/ to find out. If it is not the latest released version, get that one and see whether your bug has been fixed. Note that bug reports about old versions of perl, especially those prior to the 5.0 release, are likely to fall upon deaf ears. You are on your own if you continue to use perl1 .. perl4.
A significant number of the bug reports we get turn out to be documented features in perl. Make sure the behavior you are witnessing doesn't fall under that category, by glancing through the documentation that comes with perl (we'll admit this is no mean task, given the sheer volume of it all, but at least have a look at the sections that seem relevant).
Be aware of the familiar traps that perl programmers of various hues fall into. See perltrap.
Try to study the problem under the perl debugger, if necessary. See perldebug.
The easier it is to reproduce your bug, the more likely it will be fixed, because if no one can duplicate the problem, no one can fix it. A good test case has most of these attributes: fewest possible number of lines; few dependencies on external commands, modules, or libraries; runs on most platforms unimpeded; and is self-documenting.
A good test case is almost always a good candidate to be on the perl test suite. If you have the time, consider making your test case so that it will readily fit into the standard test suite.
The easier it is to understand a reproducible bug, the more likely it will be fixed. Anything you can provide by way of insight into the problem helps a great deal. In other words, try to analyse the problem to the extent you feel qualified and report your discoveries.
A bug report which includes a patch to fix it will almost definitely be fixed.
diff program to generate your patches (
diff is being maintained by the GNU folks as part of the diffutils package,
so you should be able to get it from any of the GNU software repositories).
If you do submit a patch,
the cool-dude counter at firstname.lastname@example.org will register you as a savior of the world.
Your patch may be returned with requests for changes,
or requests for more detailed explanations about your fix.
Here are some clues for creating quality patches: Use the -c or -u switches to the diff program (to create a so-called context or unified diff).
Make sure the patch is not reversed (the first argument to diff is typically the original file,
the second argument your changed file).
Make sure you test your patch by applying it with the
patch program before you send it on its way.
Try to follow the same style as the code you are trying to patch.
Make sure your patch really does work (
if the thing you're patching supports it).
perlbugto submit the report?
amongst other things,
ensure your report includes crucial information about your version of perl.
perlbug is unable to mail your report after you have typed it in,
you may have to compose the message yourself,
add the output produced by
perlbug -d and email it to email@example.com.
for some reason,
you cannot run
perlbug at all on your system,
be sure to include the entire output produced by running
perl -V (note the uppercase V).
Having done your bit,
please be prepared to wait,
to be told the bug is in your code,
or even to get no reply at all.
The perl maintainers are busy folks,
so if your problem is a small one or if it is difficult to understand,
they may not respond with a personal reply.
If it is important to you that your bug be fixed,
do monitor the
Changes file in any development releases since the time you submitted the bug,
and encourage the maintainers with kind words (but never any flames!).
Feel free to resend your bug report if the next released version of perl comes out and your bug is still present.
Address to send the report to. Defaults to `firstname.lastname@example.org'.
Body of the report. If not included on the command line, or in a file with -f, you will get a chance to edit the message.
Don't send copy to administrator.
Address to send copy of report to. Defaults to the address of the local perl administrator (recorded when perl was built).
Data mode (the default if you redirect or pipe output). This prints out your configuration data, without mailing anything. You can use this with -v to get more complete data.
Editor to use.
File containing the body of the report. Use this to quickly send a prepared message.
Prints a brief summary of the options.
Your return address. The program will ask you to confirm its default if you don't use this option.
Send without asking for confirmation.
Subject to include with the message. You will be prompted if you don't supply one on the command line.
Test mode. The target address defaults to `email@example.com'.
Include verbose configuration data in the report.
Kenneth Albanowski (<firstname.lastname@example.org>), subsequently doctored by Gurusamy Sarathy (<email@example.com>), Tom Christiansen (<firstname.lastname@example.org>), and Nathan Torkington (<email@example.com>).
perl(1), perldebug(1), perltrap(1), diff(1), patch(1)
None known (guess what must have been used to report them?)