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Asked: 2026-05-23T15:08:47+00:00

I’m trying to use the module HTML::Grabber to parse html in perl. It works

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I’m trying to use the module HTML::Grabber to parse html in perl. It works when I just use it in my main process, but it throws me error when I attempt to use it with threading.

Specifically, I got this error,

 Thread 1 terminated abnormally: Can't call method "parse_html_string" 
 on unblessed reference at /usr/local/ActivePerl-5.10/site/lib/HTML/Grabber.pm line 79.

where the creation of Grabber object.

$mech->get($link);
$dom = HTML::Grabber->new(html => $mech->content); #at this point

Any idea how to fix this weird problem?

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1 Answer

  1. Editorial Team

    The parse_html_string method is called on an XML::LibXML parser object.

    XML::LibXML seems to have mixed support for threads:

    What is probably happening is HTML::Grabber is creating the parser object when it is imported by your script in the main thread. Then you create a child thread, and since XML::LibXML does not clone between threads, the object disappears. You will need to do a runtime load of HTML::Grabber with require in the thread after it is spawned.

    If that is not the case, you will have to boil down your problem to a small example and post the code here.

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