DOMElement->setAttribute() loops forever (node_list_unlink bug?)

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Hello,

I'm having problems with DOMElement->setAttribute() -method with my php
script. I stripped down the code to this:

----------------------
$doc = new DOMDocument();
$doc->resolveExternals = true;
$doc->loadXml('<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";><a b="" />');

$root = $doc->getElementsByTagName('a')->item(0);
$root->setAttribute('b', '&gt;');
$root->setAttribute('b', '');

// This will never be executed
echo "done\n";
----------------------


That another setAttribute() -call never finishes, and the script will
just eventually die because of "PHP Fatal error:  Maximum execution
time.." I have tried this with cgi and cli versions of PHP 5.1.4, 5.1.1
and 5.0.5 on different servers (and different ISPs).

When running, php-process takes all CPU. I tried to debug it with gdb
and got this backtrace: http://www.palomaki.fi/dev/tmp/bt.txt - I ran
it, waited for ~5 seconds, and hit ctrl+c to pause the program to get
the backtrace. node_list_unlink seems to be calling itself forever.

Is there something I don't get, or should I just fill the bug report?

-- 
Riku Palomäki

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