From b8b6f2f2dcc7fcbdee76de3fb80c225d51a36292 Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Thu, 9 May 2019 19:18:25 +0200
Subject: [PATCH] showbase: fix BufferViewer error when opening window right
 away

---
 direct/src/showbase/ShowBase.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/direct/src/showbase/ShowBase.py b/direct/src/showbase/ShowBase.py
index ddb7fb48d8..5523d91a98 100644
--- a/direct/src/showbase/ShowBase.py
+++ b/direct/src/showbase/ShowBase.py
@@ -832,7 +832,8 @@ class ShowBase(DirectObject.DirectObject):
         if self.win is None:
             mainWindow = True
             self.win = win
-            self.bufferViewer.win = win
+            if hasattr(self, 'bufferViewer'):
+                self.bufferViewer.win = win
 
         self.winList.append(win)