[bug #28906] grep -Ax -q should print context but not matching line

[Chris]

URL:
  <http://savannah.gnu.org/bugs/?28906>

                 Summary: grep -Ax -q should print context but not matching
line
                 Project: grep
            Submitted by: seahen
            Submitted on: Mon 15 Feb 2010 05:18:54 PM GMT
                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:

Binary package hint: grep
Version: 2.5.3~dfsg-6ubuntu1

It would occasionally be useful to be able to output *only* the lines
immediately before or after the matching lines, without printing the matching
lines themselves. The logical way to do this would be to use e.g. grep -A1 -q
(since -A1 adds the line after the match and -q suppresses normal output). But
this doesn't work; instead there is no output.

Steps to reproduce:
1. Create a file test.txt whose contents are:
the
quick
brown
fox
the
lazy
dog

2. grep -A1 -q the test.txt

Expected output:
quick
lazy

Actual output: nothing.

Reposting from downstream at
https://bugs.launchpad.net/ubuntu/+source/grep/+bug/396237




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