grep \b not i18n-d after backreference

[Joakim Lundborg]

I found a bug in grep 2.5.1, in context of backreferences \b is not
internationalized, but when in context of normal characters it is.

My locale is sv_SE.ISO-8859-1.

This is what I get in grep 2.5.1:

test.txt:
det stora huset
det enda ställe

$ egrep "de(n|t) \w+a \w+\1\b" test.txt
det stora huset
det enda ställe

But:
egrep "de(n|t) \w+a \w+t\b" test.txt
det stora huset
(which is the desired result)

Minimal testcase:

test.txt:
t tä
t t
grep "(t) \1\b" test.txt
Result:
t tä
t t
Should be:
t t

--
Joakim Lundborg
<address@hidden>