[bug #20961] hyphen problem: '^[0-9\-_\.]\+$' doesnot work while '^[0-9_\.-]\+$' does

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?20961>

                 Summary: hyphen problem: '^[0-9\-_\.]\+$' doesnot work while
'^[0-9_\.-]\+$' does
                 Project: grep
            Submitted by: None
            Submitted on: Monday 09/03/2007 at 03:57 UTC
                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:

$ cat > test.txt
  1234-456
  1345_456
  23445.456
$ grep '^[0-9\-_\.]\+$' < test.txt 
  1345_456
  23445.456
$ grep '^[0-9_\.-]\+$' < test.txt 
  1234-456      #this line is missing in previous run
  1345_456
  23445.456





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