To: vim_dev@googlegroups.com
Subject: Patch 7.3.390
Fcc: outbox
From: Bram Moolenaar <Bram@moolenaar.net>
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------------

Patch 7.3.390
Problem:    Using NULL buffer pointer in a window.
Solution:   Check for w_buffer being NULL in more places. (Bjorn Winckler)
Files:	    src/ex_cmds.c, src/quickfix.c, src/window.c


*** ../vim-7.3.389/src/ex_cmds.c	2011-11-30 17:01:55.000000000 +0100
--- src/ex_cmds.c	2011-12-30 14:59:57.000000000 +0100
***************
*** 3390,3395 ****
--- 3390,3402 ----
  				      (flags & ECMD_HIDE) ? 0 : DOBUF_UNLOAD);
  
  #ifdef FEAT_AUTOCMD
+ 		/* Autocommands may open a new window and leave oldwin open
+ 		 * which leads to crashes since the above call sets
+ 		 * oldwin->w_buffer to NULL. */
+ 		if (curwin != oldwin && oldwin != aucmd_win
+ 			     && win_valid(oldwin) && oldwin->w_buffer == NULL)
+ 		    win_close(oldwin, FALSE);
+ 
  # ifdef FEAT_EVAL
  		if (aborting())	    /* autocmds may abort script processing */
  		{
*** ../vim-7.3.389/src/quickfix.c	2011-08-10 18:36:49.000000000 +0200
--- src/quickfix.c	2011-12-30 14:45:19.000000000 +0100
***************
*** 2675,2681 ****
  bt_quickfix(buf)
      buf_T	*buf;
  {
!     return (buf->b_p_bt[0] == 'q');
  }
  
  /*
--- 2675,2681 ----
  bt_quickfix(buf)
      buf_T	*buf;
  {
!     return buf != NULL && buf->b_p_bt[0] == 'q';
  }
  
  /*
***************
*** 2686,2693 ****
  bt_nofile(buf)
      buf_T	*buf;
  {
!     return (buf->b_p_bt[0] == 'n' && buf->b_p_bt[2] == 'f')
! 	    || buf->b_p_bt[0] == 'a';
  }
  
  /*
--- 2686,2693 ----
  bt_nofile(buf)
      buf_T	*buf;
  {
!     return buf != NULL && ((buf->b_p_bt[0] == 'n' && buf->b_p_bt[2] == 'f')
! 	    || buf->b_p_bt[0] == 'a');
  }
  
  /*
***************
*** 2697,2703 ****
  bt_dontwrite(buf)
      buf_T	*buf;
  {
!     return (buf->b_p_bt[0] == 'n');
  }
  
      int
--- 2697,2703 ----
  bt_dontwrite(buf)
      buf_T	*buf;
  {
!     return buf != NULL && buf->b_p_bt[0] == 'n';
  }
  
      int
*** ../vim-7.3.389/src/window.c	2011-09-14 14:43:21.000000000 +0200
--- src/window.c	2011-12-30 14:44:18.000000000 +0100
***************
*** 2170,2176 ****
  
      /* When closing the help window, try restoring a snapshot after closing
       * the window.  Otherwise clear the snapshot, it's now invalid. */
!     if (win->w_buffer->b_help)
  	help_window = TRUE;
      else
  	clear_snapshot(curtab, SNAP_HELP_IDX);
--- 2170,2176 ----
  
      /* When closing the help window, try restoring a snapshot after closing
       * the window.  Otherwise clear the snapshot, it's now invalid. */
!     if (win->w_buffer != NULL && win->w_buffer->b_help)
  	help_window = TRUE;
      else
  	clear_snapshot(curtab, SNAP_HELP_IDX);
***************
*** 2214,2226 ****
  
  #ifdef FEAT_SYN_HL
      /* Free independent synblock before the buffer is freed. */
!     reset_synblock(win);
  #endif
  
      /*
       * Close the link to the buffer.
       */
!     close_buffer(win, win->w_buffer, free_buf ? DOBUF_UNLOAD : 0);
  
      /* Autocommands may have closed the window already, or closed the only
       * other window or moved to another tab page. */
--- 2214,2228 ----
  
  #ifdef FEAT_SYN_HL
      /* Free independent synblock before the buffer is freed. */
!     if (win->w_buffer != NULL)
! 	reset_synblock(win);
  #endif
  
      /*
       * Close the link to the buffer.
       */
!     if (win->w_buffer != NULL)
! 	close_buffer(win, win->w_buffer, free_buf ? DOBUF_UNLOAD : 0);
  
      /* Autocommands may have closed the window already, or closed the only
       * other window or moved to another tab page. */
*** ../vim-7.3.389/src/version.c	2011-12-30 14:14:16.000000000 +0100
--- src/version.c	2011-12-30 14:38:39.000000000 +0100
***************
*** 716,717 ****
--- 716,719 ----
  {   /* Add new patch number below this line */
+ /**/
+     390,
  /**/

-- 
There can't be a crisis today, my schedule is already full.

 /// 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    ///