I'm trying to pack some modules with App::FatPacker on a Ubuntu 12.4 VM with perl 5.14.2, and I'm running into what looks like a bug in the module.

The first command in the fatpacker synopsis (fatpack trace myscript.pl) runs without error. When I run fatpack packlists-for `cat fatpacker.trace` >packlists, I get the following error message: Use of uninitialized value $_ in hash element at /usr/local/share/perl/5.14.2/App/FatPacker.pm line 110, <> line 42.

Line 110 of FatPacker.pm is this: my %found; @found{map +($pack_rev{$INC{$_}}||()), @targets} = ();

It's part of this sub:

sub packlists_containing {
  my ($self, $targets) = @_;
  my @targets = @$targets;
  require $_ for @targets;
  my @search = grep -d $_, map catdir($_, 'auto'), @INC;
  my %pack_rev;
  my $cwd = cwd;
  find(sub {
    return unless $_ eq '.packlist' && -f $_;
    $pack_rev{$_} = $File::Find::name for lines_of $File::Find::name;
  }, @search);
  chdir($cwd) or die "Couldn't chdir back to ${cwd} after find: $!";
  my %found; @found{map +($pack_rev{$INC{$_}}||()), @targets} = ();
  sort keys %found;
}
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This is just too tricky for me to troubleshoot. Should I install an earlier version of Ubuntu (years ago, I managed to get App::FatPacker to work on Ubuntu 8.04)?

EDIT:

I did some further testing. A test script that does not load any CPAN modules was processed by fatpacker without errors. The packed script was generated correctly.

The actual script I need to process loads Spreadsheet::WriteExcel and Spreadsheet::ParseExcel::Simple, so these are the two modules fatpacker would need to inline.

The fatpacker.trace file is as follows:

POSIX.pm
List/Util.pm
Spreadsheet/ParseExcel/Cell.pm
/usr/lib/perl/5.14/auto/POSIX/load_imports.al
Tie/Hash.pm
Cwd.pm
Spreadsheet/WriteExcel/OLEwriter.pm
Spreadsheet/ParseExcel.pm
Fcntl.pm
Symbol.pm
Spreadsheet/WriteExcel/Chart.pm
Scalar/Util.pm
Spreadsheet/ParseExcel/Format.pm
Spreadsheet/WriteExcel/BIFFwriter.pm
File/Spec.pm
File/Glob.pm
warnings/register.pm
Spreadsheet/ParseExcel/Workbook.pm
Spreadsheet/ParseExcel/Utility.pm
Spreadsheet/WriteExcel/Properties.pm
utf8.pm
Spreadsheet/WriteExcel/Worksheet.pm
File/Spec/Unix.pm
Exporter/Heavy.pm
vars.pm
Spreadsheet/WriteExcel/Formula.pm
Spreadsheet/WriteExcel/Workbook.pm
AutoLoader.pm
IO/Handle.pm
Getopt/Long.pm
SelectSaver.pm
Spreadsheet/ParseExcel/Worksheet.pm
Time/Local.pm
Spreadsheet/ParseExcel/Font.pm
unicore/Heavy.pl
unicore/To/Fold.pl
Spreadsheet/WriteExcel.pm
/usr/lib/perl/5.14/auto/POSIX/autosplit.ix
OLE/Storage_Lite.pm
FindBin.pm
IO/Seekable.pm
File/Copy.pm
Spreadsheet/WriteExcel/Format.pm
threads.pm
Digest/Perl/MD5.pm
File/Basename.pm
Config.pm
integer.pm
IO.pm
if.pm
Carp.pm
Crypt/RC4.pm
FileHandle.pm
Spreadsheet/ParseExcel/Simple.pm
utf8_heavy.pl
constant.pm
Spreadsheet/ParseExcel/FmtDefault.pm
overload.pm
IO/File.pm
feature.pm
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