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grep: Problems with back references; assertion failure


From: Justin Pryzby
Subject: grep: Problems with back references; assertion failure
Date: Wed, 12 Apr 2006 13:17:45 -0400
User-agent: Mutt/1.5.11+cvs20060403

I was of the impression that these bugs had been forwarded, but I seem
to have been wrong.

echo abc | egrep  '(.*)(.*)(.*)\3\2\1' 
grep: regexec.c:1363: pop_fail_stack: Assertion `num >= 0' failed.
Aborted

See also the following reports:
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=186568
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=292550




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