How many other users are affected by your change?
Everyone that's going to use the next version of perl whether as a user, developer, or admin. Oh wait, you meant the change that's local that hasn't roundtripped through p5p? I haven't found reason to patch a core module on the production systems but it wouldn't be forbidden if there weren't some better alternative like a newer, fixed version. We're probably in agreement that it'd be really far down on the list of things to try when working around a problem.