Hi.

Can anyone provide some insight into this weirdness please?

This was a complete pig (actually, more like a female dog) to find the cause of.

I've created a simple example script that shows the bastard issue.
Questions:
  1. In #2, why does prepending './' to the filename make 'die' produce the weird error message?
  2. In #3-#6 why does a 'die' with parameters suppress the weird error message?
  3. In #1-#6 what does '<GEN0>' in the 'die' messages mean?
Thanks! 
----------------------------------------------------------------------
+----------------------------------------
                                example #1
>>>>> type weird.pl
use strict;
use warnings;
use RTF::Tokenizer;

my $tokenizer = RTF::Tokenizer->new( file => 'test.rtf' );

foreach ( 1 .. 5 )
{
    my ( $token_type, $argument, $parameter ) = $tokenizer->get_token(
+);
    print "     $token_type, $argument, $parameter\n";
}

die;

>>>>> weird.pl
     group, 1,
     control, rtf, 1
     control, ansi,
     control, ansicpg, 1252
     control, deff, 0
Died at D:\test\weird.pl line 13, <GEN0> line 1.

----------------------------------------------------------------------
+----------------------------------------
                                example #2
>>>>> type weird.pl
use strict;
use warnings;
use RTF::Tokenizer;

my $tokenizer = RTF::Tokenizer->new( file => './test.rtf' );

foreach ( 1 .. 5 )
{
    my ( $token_type, $argument, $parameter ) = $tokenizer->get_token(
+);
    print "     $token_type, $argument, $parameter\n";
}

die;

>>>>> weird.pl
     group, 1,
     control, rtf, 1
     control, ansi,
     control, ansicpg, 1252
     control, deff, 0
Can't call method "isa" without a package or object reference at C:/Pe
+rl/site/lib/RTF/Tokenizer.pm line 170.
        ...propagated at D:\test\weird.pl line 13, <GEN0> line 1.

----------------------------------------------------------------------
+----------------------------------------
                                example #3
>>>>> type weird.pl
use strict;
use warnings;
use RTF::Tokenizer;

my $tokenizer = RTF::Tokenizer->new( file => './test.rtf' );

foreach ( 1 .. 5 )
{
    my ( $token_type, $argument, $parameter ) = $tokenizer->get_token(
+);
    print "     $token_type, $argument, $parameter\n";
}

die "";

>>>>> weird.pl
     group, 1,
     control, rtf, 1
     control, ansi,
     control, ansicpg, 1252
     control, deff, 0
Can't call method "isa" without a package or object reference at C:/Pe
+rl/site/lib/RTF/Tokenizer.pm line 170.
        ...propagated at D:\test\weird.pl line 13, <GEN0> line 1.

----------------------------------------------------------------------
+----------------------------------------
                                example #4
>>>>> type weird.pl
use strict;
use warnings;
use RTF::Tokenizer;

my $tokenizer = RTF::Tokenizer->new( file => './test.rtf' );

foreach ( 1 .. 5 )
{
    my ( $token_type, $argument, $parameter ) = $tokenizer->get_token(
+);
    print "     $token_type, $argument, $parameter\n";
}

die 1;

>>>>> weird.pl
     group, 1,
     control, rtf, 1
     control, ansi,
     control, ansicpg, 1252
     control, deff, 0
1 at D:\test\weird.pl line 13, <GEN0> line 1.

----------------------------------------------------------------------
+----------------------------------------
                                example #5
>>>>> type weird.pl
use strict;
use warnings;
use RTF::Tokenizer;

my $tokenizer = RTF::Tokenizer->new( file => './test.rtf' );

foreach ( 1 .. 5 )
{
    my ( $token_type, $argument, $parameter ) = $tokenizer->get_token(
+);
    print "     $token_type, $argument, $parameter\n";
}

die "1";

>>>>> weird.pl
     group, 1,
     control, rtf, 1
     control, ansi,
     control, ansicpg, 1252
     control, deff, 0
1 at D:\test\weird.pl line 13, <GEN0> line 1.

----------------------------------------------------------------------
+----------------------------------------
                                example #6
>>>>> type weird.pl
use strict;
use warnings;
use RTF::Tokenizer;

my $tokenizer = RTF::Tokenizer->new( file => './test.rtf' );

foreach ( 1 .. 5 )
{
    my ( $token_type, $argument, $parameter ) = $tokenizer->get_token(
+);
    print "     $token_type, $argument, $parameter\n";
}

die "one";

>>>>> weird.pl
     group, 1,
     control, rtf, 1
     control, ansi,
     control, ansicpg, 1252
     control, deff, 0
one at D:\test\weird.pl line 13, <GEN0> line 1.

----------------------------------------------------------------------
+----------------------------------------

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In reply to Very weird bug - insight would be helpful by zork42

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