This is currently an open bug in a piece of software called pilot-link that I maintain. The package (written in C) comes bundled with Perl bindings (as well as Python, Tcl, and Java bindings) which use XS to link to a shared library that provides the low-level functions. I can't seem to figure out why this particular snippet of perl fails when outputting this one character. Here is the code:
   #!/usr/bin/perl

   use strict;
   use diagnostics;
   use warnings;
   use Carp 'verbose';
   use PDA::Pilot;      # part of pilot-link, not in CPAN
 
   # it's the last value which makes the program fail;
   # and it fails only for the value 11!
   my @rec  = (0,0,0,0,0,0,0,0,11);
 
   my %info = ("type"    =>"Data",
               "creator" =>"XXXX",
               "name"    =>"test");

   my $pdb  = PDA::Pilot::File::create("test.pdb", \%info ) 
              or die "something went wrong\n";

   my $rec  = join('', map(chr, @rec));

   # It dies here, line 23
   $pdb->addRecordRaw($rec,0,0,0);

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The error that I'm getting (and ONLY when I use '11' as that last value) is:

   Can't call method "Raw" without a package or object reference

[download]

If I change that '11' to any other value, it works without a hitch, no errors or warnings.

The function that is being called (found in Pilot.xs) is as follows:

   int addRecordRaw(self, data, uid, attr, category)

      PDA::Pilot::File *self
      SV          *data
      unsigned    long uid
      int         attr
      int         category
      CODE: 
      {
         STRLEN   len;
         int      result;
         void     *buf;
         PackRaw;
         buf      = SvPV(data, len);
         RETVAL   = pi_file_append_record(self->pf, 
                    buf, len, attr, category, uid);
      }
      OUTPUT:
      RETVAL

[download]

The relevant subroutine, 'Raw', is in Pilot.pm, and is as follows:

   sub Raw {
      # Just copy the "raw" item straight through
      my($self) = @_;
      return $self->{raw};
   }

[download]

What am I missing here?

In reply to Odd behavior with a "vertical tab" character by hacker

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