Red Hat Bugzilla – Bug 157964
Grep "Segmentation fault" using Perl regular expression
Last modified: 2007-11-30 17:11:06 EST
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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050416 Fedora/1.0.3-1.3.1 Firefox/1.0.3
Description of problem:
I was using grep with a Perl regular expression to find files containing blank lines, but with some whitespace (i.e. a tab or a space).
One file (from about 20) caused grep to Segmentation fault. This file was unique from the others since the last line was empty (i.e. it has an additional newline at the end).
I found that creating a file with a single newline caused the same Segmentation fault.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. echo "\n" > temp.txt
2. grep -P '^\s+$' temp.txt
Actual Results: Segmentation fault
Expected Results: No Segmentation fault
I tried the same command on serveral different Ferdora platforms, and all give the same Segmentation fault. Specifically:
RedHat Linux 9 (i686)
Fedora Core 1 (i686)
Fedora Core 3 (i686)
Fedora Core 3 (x86_64)
I think this is something that has been addressed upstream, and which the next
GNU grep release will fix.
*** Bug 161845 has been marked as a duplicate of this bug. ***
*** Bug 161896 has been marked as a duplicate of this bug. ***