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Re^3: ref to read-only alias ... why? (not consistent)by LanX (Canon)
|on Jan 06, 2012 at 17:35 UTC||Need Help??|
Your right it's not consistent.
But IMHO consistency will most likely break legacy code.
I think that there should at least be a warning.
Since it's not always clear if a variable is an alias, this can cause very hard to detect errors in subs which are meant to modify call-by-reference parameters. (not to be confused with Perl references)
Did you check if there are already older bug-reports regarding this?
When passing an aliasing variable instead of 1 it's the same problem. With inc_b non-aliasing vars will increment, but aliases will silently fail to increment.