Well, it isn't really changing the source, just having a local version of it, and if you have it in your PERL5LIB, enabling or disabling it is just a matter of setting or unsetting PERL5DB. Also worth noting is this is not limited to just enabling 'features' but you can add modules you use a lot in debugging (Data::Dumper, YAML, JSON, etc), or subs you write yourself.

In reply to Re^3: Convenient way to use 5.10 features in perldebugger? by james2vegas
in thread Convenient way to use 5.10 features in perldebugger? by LanX

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