in reply to tr funkiness in 5.6.[12] (but not 5.6.0!)
It is certainly a good catch, and you deserve kudos for finding it.
Well, a bug report is probably pointless. Old versions certainly remain in use, however, as in my latest gig one of their AIX boxes was still using 5.0.
As an aside, were the three Perl versions (5.6.[012]) running in the same environment and built with the same compiler?
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