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BASH PATCH REPORT
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=================
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Bash-Release: 4.2
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Patch-ID: bash42-039
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Bug-Reported-by: Dan Douglas <ormaaj@gmail.com>
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Bug-Reference-ID: <1498458.MpVlmOXDB7@smorgbox>
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Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2012-09/msg00008.html
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Bug-Description:
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Under certain circumstances, bash attempts to expand variables in arithmetic
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expressions even when evaluation is being suppressed.
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Patch (apply with `patch -p0'):
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*** ../bash-4.2-patched/expr.c 2011-11-21 18:03:35.000000000 -0500
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--- expr.c 2012-09-09 16:31:18.000000000 -0400
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***************
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*** 1010,1013 ****
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--- 1073,1082 ----
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#endif
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+ /*itrace("expr_streval: %s: noeval = %d", tok, noeval);*/
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+ /* If we are suppressing evaluation, just short-circuit here instead of
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+ going through the rest of the evaluator. */
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+ if (noeval)
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+ return (0);
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+
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/* [[[[[ */
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#if defined (ARRAY_VARS)
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***************
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*** 1183,1186 ****
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--- 1256,1263 ----
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*cp = '\0';
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+ /* XXX - watch out for pointer aliasing issues here */
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+ if (curlval.tokstr && curlval.tokstr == tokstr)
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+ init_lvalue (&curlval);
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+
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FREE (tokstr);
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tokstr = savestring (tp);
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*** ../bash-4.2-patched/patchlevel.h Sat Jun 12 20:14:48 2010
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--- patchlevel.h Thu Feb 24 21:41:34 2011
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***************
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*** 26,30 ****
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looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 38
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#endif /* _PATCHLEVEL_H_ */
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--- 26,30 ----
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looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 39
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#endif /* _PATCHLEVEL_H_ */
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