Here is what happens when 2 separate packages leave their DATA opened. warn reports only the last one being opened. Is it because the interpreter will detect opened DATA and localise it?

As I said, the interpreter simply internally keeps track of the most recently accessed filehandle; "localise" is the wrong term here IMHO because it sounds like you mean something to do with local.

In reply to Re^2: Do I need/want to close __DATA__? by haukex
in thread Do I need/want to close __DATA__? by bliako

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