patch 9.0.1864: still crash with bt_quickfix1_poc

Problem:  crash with bt_quickfix1_poc when cleaning up
          and EXITFREE is defined
Solution: Test if buffer is valid in a window, else close
          window directly, don't try to access buffer properties

While at it, increase the crash timeout slightly, so that CI has a
chance to finish processing the test_crash() test.

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_crash.vim

@@ -40,7 +40,7 @@ func Test_crash1()
   " clean up
   call delete('Xerr')
   " This test takes a bit longer
-  call TermWait(buf, 500)
+  call TermWait(buf, 1000)
 
   let file = 'crash/poc_tagfunc.vim'
   let args = printf(cmn_args, vim, file)
@@ -55,7 +55,7 @@ func Test_crash1()
     \ '  && echo "crash 6: [OK]" >> X_crash1_result.txt' .. "\<cr>")
   " clean up
   call delete('X')
-  call TermWait(buf, 200)
+  call TermWait(buf, 1000)
 
   " clean up
   exe buf .. "bw!"

src/version.c

@@ -699,6 +699,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1864,
 /**/
     1863,
 /**/

src/window.c

@@ -4158,6 +4158,13 @@ close_others(
 	if (wp == curwin)		// don't close current window
 	    continue;
 
+	// autoccommands messed this one up
+	if (!buf_valid(wp->w_buffer) && win_valid(wp))
+	{
+	    wp->w_buffer = NULL;
+	    win_close(wp, 0);
+	    continue;
+	}
 	// Check if it's allowed to abandon this window
 	r = can_abandon(wp->w_buffer, forceit);
 	if (!win_valid(wp))		// autocommands messed wp up