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

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