To: vim_dev@googlegroups.com
Subject: Patch 7.4.1779
Fcc: outbox
From: Bram Moolenaar <Bram@moolenaar.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
------------

Patch 7.4.1779
Problem:    Using negative index in strcharpart(). (Yegappan Lakshmanan)
Solution:   Assume single byte when using a negative iindex.
Files:      src/eval.c


*** ../vim-7.4.1778/src/eval.c	2016-04-22 20:46:42.988145173 +0200
--- src/eval.c	2016-04-23 13:50:34.475097381 +0200
***************
*** 19774,19780 ****
  	    charlen = get_tv_number(&argvars[2]);
  	    while (charlen > 0 && nbyte + len < slen)
  	    {
! 		len += mb_char2len(p[nbyte + len]);
  		--charlen;
  	    }
  	}
--- 19774,19785 ----
  	    charlen = get_tv_number(&argvars[2]);
  	    while (charlen > 0 && nbyte + len < slen)
  	    {
! 		int off = nbyte + len;
! 
! 		if (off < 0)
! 		    len += 1;
! 		else
! 		    len += mb_char2len(p[off]);
  		--charlen;
  	    }
  	}
*** ../vim-7.4.1778/src/version.c	2016-04-22 21:11:03.836844513 +0200
--- src/version.c	2016-04-23 13:53:14.573485085 +0200
***************
*** 755,756 ****
--- 755,758 ----
  {   /* Add new patch number below this line */
+ /**/
+     1779,
  /**/

-- 
BLACK KNIGHT:  I move for no man.
ARTHUR:        So be it!
    [hah] [parry thrust]
    [ARTHUR chops the BLACK KNIGHT's left arm off]
ARTHUR:        Now stand aside, worthy adversary.
BLACK KNIGHT:  'Tis but a scratch.
                                  The Quest for the Holy Grail (Monty Python)

 /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\  an exciting new programming language -- http://www.Zimbu.org        ///
 \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///