[UPDATE] Bash-4.2 Official Patch 49

[Chet Ramey]

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

Bash-Release:   4.2
Patch-ID:       bash42-049

Bug-Reported-by:        Tavis Ormandy <taviso@cmpxchg8b.com>
Bug-Reference-ID:
Bug-Reference-URL:      http://twitter.com/taviso/statuses/514887394294652929

Bug-Description:

Under certain circumstances, bash can incorrectly save a lookahead character and
return it on a subsequent call, even when reading a new line.

Patch (apply with `patch -p0'):

*** ../bash-4.2.48/parse.y      2012-12-31 11:52:57.000000000 -0500
--- parse.y     2014-09-25 16:12:19.000000000 -0400
***************
*** 2851,2854 ****
--- 2851,2856 ----
    word_desc_to_read = (WORD_DESC *)NULL;
  
+   eol_ungetc_lookahead = 0;
+ 
    current_token = '\n';               /* XXX */
    last_read_token = '\n';
*** ../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 48
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 49
  
  #endif /* _PATCHLEVEL_H_ */

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