grep -i does not treat non-matching character ranges correctly

Tilman Johannes Bohl <[email protected]> Mon, 9 Jul 2012 21:45:45 +0200

Newsgroups	gmane.comp.gnu.utils.bugs
Message-ID	<[email protected]>

Hi,
grep doesn't seem to treat ranges of non-matching characters correctly.

To reproduce, copy into bash:
echo CLOAK_OF_DISPLACEMENT | grep -Ei 'displace[^A-Z]'

output:
CLOAK_OF_DISPLACEMENT

expected output: empty.

This is grep (GNU grep) 2.5.1, as preinstalled on Mac OS X 10.5.

Cheers,
Tilman