Bug 723878

Summary: gcc-4.0.0 regression in '\' escape handling in gsub()
Product: [Fedora] Fedora Reporter: John Ellson <john.ellson>
Component: gawkAssignee: Vojtech Vitek <vvitek>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: unspecified    
Version: rawhideCC: hripps, vvitek
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Hardware: Unspecified   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2011-07-21 21:39:50 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description John Ellson 2011-07-21 12:49:22 UTC
Description of problem:
gcc-4.0.0 regression in '\' escape handling in gsub()

gcc-3.1.8 works ok.

Version-Release number of selected component (if applicable):
gawk-4.0.0-1.fc16.x86_64

How reproducible:
100%

Steps to Reproduce:
1. echo '\\' | gawk '{gsub("\\\\","\\\\",$0); print($0);}'
2.
3.
  
Actual results:
\\

Expected results:
\\\\

Additional info:
This breaks the ~20 year old stringize.awk script in graphviz that converts postscript text into C strings.

This problem has also been reported by email to bug-gawk

Comment 1 John Ellson 2011-07-21 21:39:50 UTC
Sorry - must have been before my coffee this morning - this is a gawk bug, not gcc