Hi folks, if you run grep 2.6.3 under RedHat Enterprise Linux 6.6 with option "-P" and feed it with Latin-1 characters, it crashes with a coredump. grep 2.5.2 and grep 2.7.0 are not affected. Do you fix old versions? A single "ΓΌ" (german u-Umlaut, i.e. u with a trema) is with any totally simple search pattern is sufficient. I have appended a test file. Best regards, Christian* Kern *) no religion here, it's just my first name -- Christian Kern science+computing ag Senior IT Consultant Geschaeftsstelle Duesseldorf Faehrstr. 1 phone: +49 (211) 30 27 08-37 D-40221 Duesseldorf fax: +49 (211) 30 27 08-50 www.science-computing.de -- Vorstandsvorsitzender/Chairman of the board of management: Gerd-Lothar Leonhart Vorstand/Board of Management: Dr. Bernd Finkbeiner, Michael Heinrichs, Dr. Arno Steitz Vorsitzender des Aufsichtsrats/ Chairman of the Supervisory Board: Philippe Miltin Sitz/Registered Office: Tuebingen Registergericht/Registration Court: Stuttgart Registernummer/Commercial Register No.: HRB 382196