source: npl/system/bash/bash-4.3-patches/bash43-007 @ a87727a

                             BASH PATCH REPORT
                             =================

Bash-Release:   4.3
Patch-ID:       bash43-007

Bug-Reported-by:        geir.hauge@gmail.com
Bug-Reference-ID:       <20140318093650.B181C1C5B0B@gina.itea.ntnu.no>
Bug-Reference-URL:      http://lists.gnu.org/archive/html/bug-bash/2014-03/msg00095.html

Bug-Description:

Using compound assignments for associative arrays like

assoc=( [x]= [y]=bar )

left the value corresponding to the key `x' NULL.  This caused subsequent
lookups to interpret it as unset.

Patch (apply with `patch -p0'):

*** ../bash-4.3/arrayfunc.c     2013-08-02 16:19:59.000000000 -0400
--- arrayfunc.c 2014-03-18 11:08:15.000000000 -0400
***************
*** 598,601 ****
--- 598,606 ----
        {
          val = expand_assignment_string_to_string (val, 0);
+         if (val == 0)
+           {
+             val = (char *)xmalloc (1);
+             val[0] = '\0';    /* like do_assignment_internal */
+           }
          free_val = 1;
        }
*** ../bash-4.3/patchlevel.h    2012-12-29 10:47:57.000000000 -0500
--- patchlevel.h        2014-03-20 20:01:28.000000000 -0400
***************
*** 26,30 ****
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 6
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 7
  
  #endif /* _PATCHLEVEL_H_ */