> ... I was expecting that a core module either treats $_ safely when calling foreign code ...

I filed a bug report for Attribute::Handlers with an attached diff which solves this issue.

http://rt.perl.org/rt3/Ticket/Display.html?id=74052

Cheers Rolf

UPDATE: wow already resolved at the following day! Steffen Müller++

In reply to Re^3: Reading sourcecode at parsing/compilation (CHECK) time? (Ticket) by LanX
in thread Reading sourcecode at parsing/compilation (CHECK) time? by LanX

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