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