1 			     BASH PATCH REPORT

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

     3 

     4 Bash-Release:	4.2

     5 Patch-ID:	bash42-046

     6 

     7 Bug-Reported-by:	"Theodoros V. Kalamatianos" <[email protected]>

     8 Bug-Reference-ID:	<[email protected]>

     9 Bug-Reference-URL:	http://lists.gnu.org/archive/html/bug-bash/2014-01/msg00044.html

    10 

    11 Bug-Description:

    12 

    13 Bash-4.2 patch 32 introduced a problem with "$@" and arrays expanding empty

    14 positional parameters or array elements when using substring expansion,

    15 pattern substitution, or case modfication.  The empty parameters or array

    16 elements are removed instead of expanding to empty strings ("").

    17 

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

    19 

    20 *** ../bash-4.2-patched/subst.c	2012-12-31 11:52:56.000000000 -0500

    21 --- subst.c	2014-03-31 14:19:56.000000000 -0400

    22 ***************

    23 *** 7243,7247 ****

    24         ret = alloc_word_desc ();

    25         ret->word = temp1;

    26 !       if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))

    27   	ret->flags |= W_QUOTED|W_HASQUOTEDNULL;

    28         return ret;

    29 --- 7243,7253 ----

    30         ret = alloc_word_desc ();

    31         ret->word = temp1;

    32 !       /* We test quoted_dollar_atp because we want variants with double-quoted

    33 ! 	 "$@" to take a different code path. In fact, we make sure at the end

    34 ! 	 of expand_word_internal that we're only looking at these flags if

    35 ! 	 quoted_dollar_at == 0. */

    36 !       if (temp1 && 

    37 !           (quoted_dollar_atp == 0 || *quoted_dollar_atp == 0) &&

    38 ! 	  QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))

    39   	ret->flags |= W_QUOTED|W_HASQUOTEDNULL;

    40         return ret;

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

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

    43 ***************

    44 *** 26,30 ****

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

    46   

    47 ! #define PATCHLEVEL 45

    48   

    49   #endif /* _PATCHLEVEL_H_ */

    50 --- 26,30 ----

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

    52   

    53 ! #define PATCHLEVEL 46

    54   

    55   #endif /* _PATCHLEVEL_H_ */