To: vim_dev@googlegroups.com
Subject: Patch 7.4.1704
Fcc: outbox
From: Bram Moolenaar <Bram@moolenaar.net>
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------------

Patch 7.4.1704
Problem:    Using freed memory with "wincmd p". (Dominique Pelle)
Solution:   Also clear "prevwin" in other tab pages.
Files:      src/window.c


*** ../vim-7.4.1703/src/window.c	2016-03-31 22:27:36.660109374 +0200
--- src/window.c	2016-04-03 21:15:23.362842110 +0200
***************
*** 340,346 ****
  /* cursor to last accessed (previous) window */
      case 'p':
      case Ctrl_P:
! 		if (prevwin == NULL)
  		    beep_flush();
  		else
  		    win_goto(prevwin);
--- 340,346 ----
  /* cursor to last accessed (previous) window */
      case 'p':
      case Ctrl_P:
! 		if (!win_valid(prevwin))
  		    beep_flush();
  		else
  		    win_goto(prevwin);
***************
*** 4577,4584 ****
      unref_var_dict(wp->w_vars);
  #endif
  
!     if (prevwin == wp)
! 	prevwin = NULL;
      win_free_lsize(wp);
  
      for (i = 0; i < wp->w_tagstacklen; ++i)
--- 4577,4591 ----
      unref_var_dict(wp->w_vars);
  #endif
  
!     {
! 	tabpage_T	*ttp;
! 
! 	if (prevwin == wp)
! 	    prevwin = NULL;
! 	for (ttp = first_tabpage; ttp != NULL; ttp = ttp->tp_next)
! 	    if (ttp->tp_prevwin == wp)
! 		ttp->tp_prevwin = NULL;
!     }
      win_free_lsize(wp);
  
      for (i = 0; i < wp->w_tagstacklen; ++i)
*** ../vim-7.4.1703/src/version.c	2016-04-03 20:57:17.013726476 +0200
--- src/version.c	2016-04-03 21:19:58.504042155 +0200
***************
*** 750,751 ****
--- 750,753 ----
  {   /* Add new patch number below this line */
+ /**/
+     1704,
  /**/

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 /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
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