#!/usr/bin/perl

use strict;
use CGI::Carp qw(fatalsToBrowser warningsToBrowser);

eval {
die "Ouch";
};
if ($@) {
    print $@, "\n";
}

eval {
my_die("Ouch");
};
if ($@) {
    print $@, "\n";
}

sub my_die {
  my ($arg) = @_;

  if (CGI::Carp::ineval) {
    $arg = join("", @_);
    my($file,$line,$id) = CGI::Carp::id(1);
    $arg .= " at $file line $line." unless $arg=~/\n$/;
    if ($arg !~ /\n$/) {
      $arg .= "\n";
    }
    CGI::Carp::realdie $arg;
  }
  if (!ref($arg)) {
    $arg = join("", @_);
    my($file,$line,$id) = CGI::Carp::id(1);
    $arg .= " at $file line $line." unless $arg=~/\n$/;
    &fatalsToBrowser($arg) if $CGI::Carp::WRAP;
    if (($arg =~ /\n$/) || !exists($ENV{MOD_PERL})) {
      my $stamp = CGI::Carp::stamp;
      $arg=~s/^/$stamp/gm;
    }
    if ($arg !~ /\n$/) {
      $arg .= "\n";
    }
  }
  realdie $arg;
}
[download]

While I think that you have stumbled onto an undesirable behavior in CGI::Carp, the bug causing your script to die in the first place is still.... within your script.

However, that said, here's an interesting observation:

With CGI::Carp.....

use CGI::Carp;
eval { die "Ouch!" };
print $@, "\n";
__OUTPUT__
Ouch at C:/Perl/lib/CGI/Carp.pm line 312.
[download]

With Carp.pm.....

use Carp;
eval { die "Ouch" };
print $@, "\n";
__OUTPUT__
Ouch at C:\Perl\scripts\mytest.pl line 6.
[download]

And with CORE::die()....

<p>
eval { CORE::die "Ouch" }
print $@, "\n";
__OUTPUT__
Ouch at C:\Perl\scripts\mytest.pl line 5.
[download]

The documentation for CGI::Carp says that in the realm of CGI scripts, you can simply replace "use Carp;" with "use CGI::Carp;". You've discovered that it's not quite that simple... their behavior with respect to reporting a fatal that occurred inside an eval is not uniform.




Dave