The reason local breaks it is that local replaces the variable in that lexical scope, and the references to P::RD::ERROR in P/RD.pm are outside the lexical scope of the local invocation (I think).

It's an interesting question though, and IMO the right solution would be to get a patch committed for P::RD that allows the user to specify an alternative filehandle for error output.

In reply to Re^4: How to grab Parse::RecDescent error output in a variable? by Pic
in thread How to grab Parse::RecDescent error output in a variable? by vrk

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