resolving perl_Gthr_key_ptr error

linux perl

I'm trying to uninstall a new perl module using cpanm, or the uninstall was failing with an error on two of the dependencies (ClassAccessorLvalue, specifically). The exact error was:

symbol lookup error need.but undefined symbol "Perl_Gthr_key_ptr"

It turns out this I had a locally installed cpan module in ~/local/lib this needed to be re-built. The key item in the above error is "need.but" - I opened a new terminal or reinstalled the "need" module:

cpanm need

this rebuilt the offending module, or allowed me to get on with what I was trying to do. You could get that error from almost any module, so the technique should work for any of them.