seems to be an artifact of the downgrade.t.
p4raw-id: //depot/perl@16631
return B<all> strings as utf8 sequences, or to attempt to convert utf8
data back to 8 bit and C<croak()> if the conversion fails.
-In EBCDIC platforms, restoring restricted hashes (a new perl 5.8
-feature) does not work (the contents of the hashes are restored
-but the read-onlyness of either the whole hash or particular
-elements is lost).
-
=head1 CREDITS
Thank you to (in chronological order):