On Sa, 26 Mai 2012, Christian Brabandt wrote:
> On Fr, 25 Mai 2012, Alex Efros wrote:
> > Thanks! But, sorry, I just found another simple way to crash 7.3.530
> > without tabs:
> > 
> >     $ vi -u /dev/null --noplugin
> >     :autocmd BufWinLeave * if empty(getbufvar(0+expand('<abuf>'), '&bt')) | 
> > lclose | endif
> >     :lexpr system('echo :1:some')
> >     :lopen
> >     :wincmd p
> >     :bd
> >     Vim: Caught deadly signal SEGV
> >     Segmentation fault
> 
> I'll look into it.

Here is another patch. I made win_close() return a status, whether it 
failed or not.

But although win_close() is called in many places, I made it only in 1 
place at do_buffer() evaluate the return value of win_close(), to not 
introduce too many other changes.

regards,
Christian
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diff --git a/src/buffer.c b/src/buffer.c
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -1151,7 +1151,10 @@
 	 */
 	while (buf == curbuf
 		   && (firstwin != lastwin || first_tabpage->tp_next != NULL))
-	    win_close(curwin, FALSE);
+	{
+	    if (win_close(curwin, FALSE) == FAIL);
+		return FAIL;
+	}
 #endif
 
 	/*
diff --git a/src/proto/window.pro b/src/proto/window.pro
--- a/src/proto/window.pro
+++ b/src/proto/window.pro
@@ -9,7 +9,7 @@
 void win_equal __ARGS((win_T *next_curwin, int current, int dir));
 void close_windows __ARGS((buf_T *buf, int keep_curwin));
 int one_window __ARGS((void));
-void win_close __ARGS((win_T *win, int free_buf));
+int win_close __ARGS((win_T *win, int free_buf));
 void win_close_othertab __ARGS((win_T *win, int free_buf, tabpage_T *tp));
 void win_free_all __ARGS((void));
 win_T *winframe_remove __ARGS((win_T *win, int *dirp, tabpage_T *tp));
diff --git a/src/window.c b/src/window.c
--- a/src/window.c
+++ b/src/window.c
@@ -2147,7 +2147,7 @@
  *
  * Called by :quit, :close, :xit, :wq and findtag().
  */
-    void
+    int
 win_close(win, free_buf)
     win_T	*win;
     int		free_buf;
@@ -2164,19 +2164,19 @@
     if (last_window())
     {
 	EMSG(_("E444: Cannot close last window"));
-	return;
+	return FAIL;
     }
 
 #ifdef FEAT_AUTOCMD
     if (win == aucmd_win)
     {
 	EMSG(_("E813: Cannot close autocmd window"));
-	return;
+	return FAIL;
     }
     if ((firstwin == aucmd_win || lastwin == aucmd_win) && one_window())
     {
 	EMSG(_("E814: Cannot close window, only autocmd window would remain"));
-	return;
+	return FAIL;
     }
 #endif
 
@@ -2184,7 +2184,7 @@
      * and then close the window and the tab page to avoid that curwin and
      * curtab are invalid while we are freeing memory. */
     if (close_last_window_tabpage(win, free_buf, prev_curtab))
-      return;
+      return OK;
 
     /* When closing the help window, try restoring a snapshot after closing
      * the window.  Otherwise clear the snapshot, it's now invalid. */
@@ -2210,15 +2210,15 @@
 	    other_buffer = TRUE;
 	    apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf);
 	    if (!win_valid(win) || last_window())
-		return;
+		return FAIL;
 	}
 	apply_autocmds(EVENT_WINLEAVE, NULL, NULL, FALSE, curbuf);
 	if (!win_valid(win) || last_window())
-	    return;
+	    return FAIL;
 # ifdef FEAT_EVAL
 	/* autocmds may abort script processing */
 	if (aborting())
-	    return;
+	    return FAIL;
 # endif
     }
 #endif
@@ -2246,7 +2246,7 @@
      * other window or moved to another tab page. */
     if (!win_valid(win) || last_window() || curtab != prev_curtab
 	    || close_last_window_tabpage(win, free_buf, prev_curtab))
-	return;
+	return FAIL;
 
     /* Free the memory used for the window and get the window that received
      * the screen space. */
@@ -2326,6 +2326,7 @@
 #endif
 
     redraw_all_later(NOT_VALID);
+    return OK;
 }
 
 /*

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