Re: ${assoc[key]+set} no longer works.

[Chet Ramey]

On 3/18/14 5:36 AM, geir.ha...@gmail.com wrote:

> Bash Version: 4.3
> Patch Level: 0
> Release Status: release
> 
> Description:
>     With an associative array, assoc, ${assoc[key]+set} expands to the
>     empty string if the associated value is the empty string.

Thanks for the report.  This was a consequence of a change made back in
2011 to expand the value portion of the assignment statement a slightly
different way.  I've attached a patch to fix it.

Chet

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    c...@case.edu    http://cnswww.cns.cwru.edu/~chet/

*** ../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;
  	}