Hi Shlomi,
it took me a while to get back to it.
The versions of the two systems where the error came up are:
1.
Slackware 14.0, kernel 3.2.29-smp
"This is perl 5, version 16, subversion 3 (v5.16.3) built for
i486-linux-thread-multi" Carp.pm:
our $VERSION = '1.26';
2.
Debian testing ("Debian 3.16.7-ckt7-1 (2015-03-01) i686")
This is perl 5, version 20, subversion 2 (v5.20.2) built for
i586-linux-gnu-thread-multi-64int
Carp.pm:
our $VERSION = '1.3301';
From what Andy said I think it is not easy to reproduce the error. I
was not successful when trying it out on my system with the same Perl
(perhaps a different patch level, though), and the same data. At least,
I'm sure it is not reproducible using a minimal example.
I don't know if this setting has any influence:
main( @ARGV ) unless caller();
sub main {
...
}
sub ...
I just worked around by using warn/die again.
--
Manfred
On Tue, 31 Mar 2015 13:24:31 +0300
Shlomi Fish <shlo...@shlomifish.org> wrote:
> Hi Manfred,
>
> On Tue, 31 Mar 2015 10:28:13 +0200
> Manfred Lotz <manfred.l...@arcor.de> wrote:
>
> > Hi there,
> > I have a script where I use croak and somebody else using that
> > script gets
> >
> > Bizarre copy of HASH in list assignment
> > at /usr/share/perl/5.20/Carp.pm line 228.
> >
> > I get a message like this, instead:
> >
> > Variable b has empty value! at ./x.pl line 23.
> > main::myfunc() called at ./x.pl line 8
> >
> > which is what should happen.
> >
> > Any idea what this message means? I'm not able to reproduce it.
> >
> > Here a minimal example:
> >
> > #! /usr/bin/perl
> >
> > use strict;
> > use warnings;
> >
> > use Carp;
> >
> > myfunc();
> >
> >
> >
> > sub myfunc {
> > my %vars = (
> > 'a' => 'some val',
> > 'b' => q{},
> > );
> >
> > while ( my ( $key, $val ) = each %vars ) {
> > if ( not defined $val ) {
> > croak "No value given for $key";
> > }
> > if ( $val eq q{} ) {
> > croak "Variable $key has empty value!";
> > }
> > }
> > return;
> > }
> >
>
> This code looks fine to me (except for some \t|4-space-indent mixup,
> which is relatively minor). I cannot reproduce the reported problem
> here ( perl-5.20.1-8.mga5 on Mageia Linux x86-64 5 - I'm getting
> something similar to what you are getting).
>
> Can you please ask your friend for:
>
> 1. Operating system + version.
>
> 2. The perl 5 distribution and its version.
>
> 3. Version of Carp.pm and the surrounding lines.
>
> 4. Other parameters of their environment.
>
> Maybe this way we'll be able to reproduce it.
>
> Regards,
>
> Shlomi Fish
>
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