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Postings from October 2011
On 09/08/2011 07:16 PM, Tom Christiansen wrote:
>
> I'm sure this is the same bug, but I see that not all
> combinations of FB00 (ff) and FB01 (fi) work.
>
> % perl -le 'print "\x{FB00}\x{FB01}" =~ /ff/i || 0'
> 1
> % perl -le 'print "\x{FB01}\x{FB00}" =~ /ff/i || 0'
> 0
> % perl -le 'print "\x{FB00}\x{FB01}" =~ /fi/i || 0'
> 0
> % perl -le 'print "\x{FB01}\x{FB00}" =~ /fi/i || 0'
> 1
As I said in an earlier email, this is not the same bug as the ones
involving the sharp SS. And these are now fixed, leaving this
particular symptom (I hope) only for the 3 "tricky" fold characters and
their folds. Those require significantly more work than this trivial 1
line patch:
commit 7c1b9f38fcbfdb3a9e1766e02bcb991d1a5452d9
Author: Karl Williamson <public@khwilliamson.com>
Date: Thu Oct 13 19:56:45 2011 -0600
regexec.c: Fix "\x{FB01}\x{FB00}" =~ /ff/i
Only the first character of the string was being checked when scanning
for the beginning position of the pattern match.
This was so wrong, it looks like it has to be a regression. I
experimented a little and did not find any. I believe (but am not
certain) that a multi-char fold has to be involved. The the
handling of
these was so broken before 5.14 that there very well may not be a
regression.
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