> Same problem is on 5.5 where grep version is 2.5.1 Are you sure? $ echo 'ASDFG' | grep '[a-z]' $
Strange, but confirmed, happened also if compiled without all RH patches.
But probably it is not related to Bug #590002.
Happened with: LANG=cs_CZ.UTF-8 but NOT with: LANG=en_US.UTF-8
Thus it is not the same issue as in Bug #590002 and the "Description of problem" is not valid.
Not my call, but I'd close this as NOTABUG.
OK, thanks.