XML-Twig problem with Perl 5.16

zuma53 has asked for the wisdom of the Perl Monks concerning the following question:

Hi--

I installed Perl 5.16 64-bit and XML-Twig 3.40 on my system and it seems that the code I had that was working, now does not.

Specifically, when I am doing

my $twig = new XML::Twig;
$twig->parse('<objects />');
$root = $twig->root;

...loop...
my $object = new XML::Twig;
$object->parse('<object />');
$objRoot = $object->root;
...build object xml...
$objRoot->paste('last_child', $root);
[download]

What's happening is that the first paste to objects works, but all the subsequent pastes do not.

This works fine in 5.14 and if I revert back all is fine.

Has anyone run into this?

Thanks.

Comment on XML-Twig problem with Perl 5.16 Download Code

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Re: XML-Twig problem with Perl 5.16 by mirod (Canon) on Jun 28, 2012 at 04:19 UTC
In 5.14 are you sure you are using XML::Twig 3.40? In previous versions of the module there was a bug that would let you paste the root of an XML::Twig object without cutting it first. It looks like it is the case here, when you paste `$objRoot`. On a side note, you may want to write `XML::Twig->new` instead of `new XML::Twig`, search the web for `perl indirect object syntax` if you want to know why.	[reply]
Re^2: XML-Twig problem with Perl 5.16 by zuma53 (Beadle) on Jun 28, 2012 at 21:14 UTC
In my 5.14 version, Twig 3.39 is installed there. Thanks.	[reply]
Re^3: XML-Twig problem with Perl 5.16 by mirod (Canon) on Jun 29, 2012 at 05:50 UTC
There you go then, you should either fix the bug by cutting `$objRoot` before pasting it, or wait for XML::Twig 3.41 which should allow for the old behaviour to work.	[reply]
Re: XML-Twig problem with Perl 5.16 by Anonymous Monk on Jun 27, 2012 at 15:12 UTC
And which version of expat do you have? XML::Parser? See XML::Twig too many children? and Re: XML::Twig size problem	[reply]
Re^2: XML-Twig problem with Perl 5.16 by Anonymous Monk on Jun 27, 2012 at 20:27 UTC
Yes, I think that the real problem is that the dependency-list as used by CPAN is not complete. Modules (like these) that need to get upgraded, don't automatically get upgraded (or recompiled) as they ought to.	[reply]
Re^3: XML-Twig problem with Perl 5.16 by zuma53 (Beadle) on Jun 28, 2012 at 19:01 UTC
OIC. All I did was an out-of-the-box install. That is, getting a copy of 5.16 from ActiveState and using PPM to download XML-Twig. This had been what I have been doing and have never had a problem. I thought something had changed in 5.16 that stopped Twig from working properly. Thanks.	[reply]
Re^3: XML-Twig problem with Perl 5.16 by Anonymous Monk on Jun 27, 2012 at 20:32 UTC
Yes, I think that the real problem is trolls	[reply]
Re: XML-Twig problem with Perl 5.16 by locked_user sundialsvc4 (Abbot) on Jun 27, 2012 at 22:21 UTC
That really isn’t “trolls.” The OP does not say exactly how he went about switching Perl versions (and then, apparently, switching back ...) but it nevertheless is true that there’s a lot of package-interdependency and, within almost each and every package, a fairly substantial chunk of XS (that is, “C[++]”) code. Including, maybe, stuff that talks to the Perl interpreter’s `perlguts`. If there should happen to be any sort of mismatch or incompatibility there ... well, it might cause a binary-explosion or ... it might not. What it certainly could cause is, “it works in one version of Perl (on my computer, as I am running it) but not the other (ditto).” I frankly would not expect that differences between the two Perls, e.g. at a language/syntax level, would be the root-cause, i-f the package in question (taken by itself) has been certified against that version. It rings true to me.
Re^2: XML-Twig problem with Perl 5.16 by Anonymous Monk on Jun 28, 2012 at 01:23 UTC
That really isn’t “trolls.” Great, more obtuse trolls with irrelevant nonsense junk	[reply]