http://www.perlmonks.org?node_id=1009139


in reply to Re: undefined symbol: PL_thr_key
in thread undefined symbol: PL_thr_key

I'll not disregard your question, for the sake of future readers.

The error comes from a module compiled against threaded Perl while your Perl installation is not threaded (probably because you recompiled it). The solution is to recompile the module against the new Perl.

(I had a few such problems when toggling the threads flag on Gentoo.)