Description :
One recurring problem in modules that use the Scalar::Util manpage\'s
\'weaken\' function is that it is not present in the pure-perl variant.
While this isn\'t necesarily always a problem in a straight CPAN-based Perl
environment, some operating system distributions only include the pure-Perl
versions, don\'t include the XS version, and so weaken is then \"missing\"
from the platform, *despite* passing a dependency on the Scalar::Util
manpage successfully.
Most notably this is RedHat Linux at time of writing, but other come and go
and do the same thing, hence \"recurring problem\".
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