[bug #25765] grep -P regexp also prints the line before the match

[Andriy Sen]

URL:
  <http://savannah.gnu.org/bugs/?25765>

                 Summary: grep -P regexp also prints the line before the
match
                 Project: grep
            Submitted by: apsen
            Submitted on: Срд 04 Мар 2009 19:01:05
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:


As far as I could see this is not the same as one of previously reported
problems.

See tree examples below. The last one shows the problem.

G:\>grep -V
GNU grep 2.5.3

Copyright (C) 1988, 1992-2002, 2004, 2005  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


G:\>cat test.s
a
1

G:\>od -a test.s
0000000   a  nl   1  nl
0000004

G:\>cat test.s | grep -P "^[^0]1"


G:\>cat test.s | grep -P "^(|[^0])1"
1

G:\>cat test.s | grep -P "^(|.*[^0])1"
a
1

G:\>






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