1 			     BASH PATCH REPORT

     2 			     =================

     3 

     4 Bash-Release:	4.2

     5 Patch-ID:	bash42-039

     6 

     7 Bug-Reported-by:	Dan Douglas <[email protected]>

     8 Bug-Reference-ID:	<1498458.MpVlmOXDB7@smorgbox>

     9 Bug-Reference-URL:	http://lists.gnu.org/archive/html/bug-bash/2012-09/msg00008.html

    10 

    11 Bug-Description:

    12 

    13 Under certain circumstances, bash attempts to expand variables in arithmetic

    14 expressions even when evaluation is being suppressed.

    15 

    16 Patch (apply with `patch -p0'):

    17 

    18 *** ../bash-4.2-patched/expr.c	2011-11-21 18:03:35.000000000 -0500

    19 --- expr.c	2012-09-09 16:31:18.000000000 -0400

    20 ***************

    21 *** 1010,1013 ****

    22 --- 1073,1082 ----

    23   #endif

    24   

    25 + /*itrace("expr_streval: %s: noeval = %d", tok, noeval);*/

    26 +   /* If we are suppressing evaluation, just short-circuit here instead of

    27 +      going through the rest of the evaluator. */

    28 +   if (noeval)

    29 +     return (0);

    30 + 

    31     /* [[[[[ */

    32   #if defined (ARRAY_VARS)

    33 ***************

    34 *** 1183,1186 ****

    35 --- 1256,1263 ----

    36   

    37         *cp = '\0';

    38 +       /* XXX - watch out for pointer aliasing issues here */

    39 +       if (curlval.tokstr && curlval.tokstr == tokstr)

    40 + 	init_lvalue (&curlval);

    41 + 

    42         FREE (tokstr);

    43         tokstr = savestring (tp);

    44 *** ../bash-4.2-patched/patchlevel.h	Sat Jun 12 20:14:48 2010

    45 --- patchlevel.h	Thu Feb 24 21:41:34 2011

    46 ***************

    47 *** 26,30 ****

    48      looks for to find the patch level (for the sccs version string). */

    49   

    50 ! #define PATCHLEVEL 38

    51   

    52   #endif /* _PATCHLEVEL_H_ */

    53 --- 26,30 ----

    54      looks for to find the patch level (for the sccs version string). */

    55   

    56 ! #define PATCHLEVEL 39

    57   

    58   #endif /* _PATCHLEVEL_H_ */