Many module authors set a design objective of making their modules
"dependent only on core modules". This is a comment that I see on a
regular basis.
When I hear or read that, I always wonder if the author realised that
"core modules" is something dependant on the Perl distribution version.
For example a module as important as Test::More was included in the
core in 5.7, which really means 5.8.
This isn't an issue.
Any distribution is going to have a Perl version dependency.
So for any given distribution $d with Perl version dependency
$d->minver, it needs to keep $d->deps as a subset of
$perl[$d->minver]->modules.
This is what 99% of authors mean by that phrase.
And generally the bugs only occur when they misread their minimum
version, or don't put an explicit minimum (and so never bother to check).
Adam K
