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PERLBUG(1)             Perl Programmers Reference Guide             PERLBUG(1)

       perlbug - how to submit bug reports on Perl

       perlbug [ -v ] [ -a address ] [ -s subject ] [ -b body | -f inputfile ] [ -F outputfile ] [ -r returnaddress ]
       [ -e editor ] [ -c adminaddress | -C ] [ -S ] [ -t ]  [ -d ]  [ -A ]  [ -h ]

       perlbug [ -v ] [ -r returnaddress ]
        [ -A ] [ -ok | -okay | -nok | -nokay ]

       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 fol-
       low 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  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:

       What version of Perl you are running?
           Type "perl -v" at the command line to find out.

       Are you running the latest released version of perl?
           Look at 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 ..

       Are you sure what you have is a bug?
           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.

           Check in perldiag to see what any Perl error message(s) mean.  If message isn't in perldiag, it probably
           isn't generated by Perl.  Consult your operating system documentation instead.

           If you are on a non-UNIX platform check also perlport, as some features may be unimplemented or work dif-

           Try to study the problem under the Perl debugger, if necessary.  See perldebug.

       Do you have a proper test case?
           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.

           Remember also to include the exact error messages, if any.  "Perl complained something" is not an exact
           error message.

           If you get a core dump (or equivalent), you may use a debugger (dbx, gdb, etc) to produce a stack trace to
           include in the bug report.  NOTE: unless your Perl has been compiled with debug info (often -g), the stack
           trace is likely to be somewhat hard to use because it will most probably contain only the function names
           and not their arguments.  If possible, recompile your Perl with debug info and reproduce the dump and the
           stack trace.

       Can you describe the bug in plain English?
           The easier it is to understand a reproducible bug, the more likely it will be fixed.  Anything you can pro-
           vide by way of insight into the problem helps a great deal.  In other words, try to analyze the problem (to
           the extent you can) and report your discoveries.

       Can you fix the bug yourself?
           A bug report which includes a patch to fix it will almost definitely be fixed.  Use the "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 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 ("make test", if the thing you're
           patching supports it).

       Can you use "perlbug" to submit the report?
           perlbug will, amongst other things, ensure your report includes crucial information about your version of
           perl.  If "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  If, 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).

           Whether you use "perlbug" or send the email manually, please make your Subject line informative.  "a bug"
           not informative.  Neither is "perl crashes" nor "HELP!!!".  These don't help.  A compact description of
           what's wrong is fine.

       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 under-
       stand or already known, 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.

       -a      Address to send the report to.  Defaults to

       -A      Don't send a bug received acknowledgement to the reply address.  Generally it is only a sensible to use
               this option if you are a perl maintainer actively watching perl porters for your message to arrive.

       -b      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.

       -C      Don't send copy to administrator.

       -c      Address to send copy of report to.  Defaults to the address of the local perl administrator (recorded
               when perl was built).

       -d      Data mode (the default if you redirect or pipe output).  This prints out your configuration data, with-
               out mailing anything.  You can use this with -v to get more complete data.

       -e      Editor to use.

       -f      File containing the body of the report.  Use this to quickly send a prepared message.

       -F      File to output the results to instead of sending as an email. Useful particularly when running perlbug
               on a machine with no direct internet connection.

       -h      Prints a brief summary of the options.

       -ok     Report successful build on this system to perl porters. Forces -S and -C. Forces and supplies values
               for -s and -b. Only prompts for a return address if it cannot guess it (for use with make). Honors
               return address specified with -r.  You can use this with -v to get more complete data.   Only makes a
               report if this system is less than 60 days old.

       -okay   As -ok except it will report on older systems.

       -nok    Report unsuccessful build on this system.  Forces -C.  Forces and supplies a value for -s, then
               requires you to edit the report and say what went wrong.  Alternatively, a prepared report may be sup-
               plied using -f.  Only prompts for a return address if it cannot guess it (for use with make). Honors
               return address specified with -r.  You can use this with -v to get more complete data.  Only makes a
               report if this system is less than 60 days old.

       -nokay  As -nok except it will report on older systems.

       -r      Your return address.  The program will ask you to confirm its default if you don't use this option.

       -S      Send without asking for confirmation.

       -s      Subject to include with the message.  You will be prompted if you don't supply one on the command line.

       -t      Test mode.  The target address defaults to

       -v      Include verbose configuration data in the report.

       Kenneth Albanowski (<>), subsequently doctored by Gurusamy Sarathy (<>),
       Tom Christiansen (<>), Nathan Torkington (<>), Charles F. Randall
       (<>), Mike Guy (<>), Dominic Dunlop (<>), Hugo van der Sanden
       (<<gt>), Jarkko Hietaniemi (<>), Chris Nandor (<>), Jon Orwant
       (<>, and Richard Foley (<>).

       perl(1), perldebug(1), perldiag(1), perlport(1), perltrap(1), diff(1), patch(1), dbx(1), gdb(1)

       None known (guess what must have been used to report them?)

perl v5.8.8                       2012-01-22                        PERLBUG(1)