Hi

I'm getting counter intuitive results

From the docs of to Carp#$Carp::Verbose

• $Carp::Verbose

  This variable makes carp() and croak() generate stack backtraces just like cluck() and confess(). This is how use Carp "verbose" is implemented internally.

  Defaults to 0.

my results show no difference...

What am I missing?

here my code

 
use strict;
use warnings;
use Carp;

#use Data::Dumper;

sub out {warn @_,"\n" }

out "Perl-Version $] $^OS";

out '====== default $Carp::Verbose =',$Carp::Verbose;

my $err_msg = "Fehlermeldung";


sub throw0 {
    my ($type) = @_;
    out "=== Testing $type";


    eval { goto $type } or die "Testcase '$type' not implemented";
  croak:
    croak $err_msg;
  die:
    die $err_msg;
  confess:
    confess $err_msg;
}

sub throw1 {
    throw0(@_)
}

sub throw2 {
    throw1(@_)
}



for my $verbose ( undef,0,1 ){
    if (defined $verbose) {
        $Carp::Verbose = $verbose;
        out "====== Setting Verbose to $verbose";
    }

    # --- types of dieing
    for my $type (qw/die croak confess/){
        eval { throw2($type) } or out $@;
    }
}



#done_testing();
[download]

update

I think I found the issue

Here is a more complete description of how carp and croak work. What they do is search the call-stack for a function call stack where they have not been told that there shouldn't be an error. If every call is marked safe, they give up and give a full stack backtrace instead. In other words they presume that the first likely looking potential suspect is guilty.

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