diff --git a/src/testdir/test_crash.vim b/src/testdir/test_crash.vim
index b997cc1..8c79d3a 100644
--- a/src/testdir/test_crash.vim
+++ b/src/testdir/test_crash.vim
@@ -40,7 +40,7 @@
   " 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 @@
     \ '  && 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!"
diff --git a/src/version.c b/src/version.c
index a19b81e..c2faee4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1864,
+/**/
     1863,
 /**/
     1862,
diff --git a/src/window.c b/src/window.c
index 152365e..1af2395 100644
--- a/src/window.c
+++ b/src/window.c
@@ -4158,6 +4158,13 @@
 	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