From a819ebcff81841c9b86b1254a10dddee4a52124d Mon Sep 17 00:00:00 2001
From: yumoqing <yumoqing@gmail.com>
Date: Fri, 2 Jul 2021 19:49:37 +0800
Subject: [PATCH] bugfix

---
 kivyblocks/widget_css.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kivyblocks/widget_css.py b/kivyblocks/widget_css.py
index 4f62e83..fc6a453 100644
--- a/kivyblocks/widget_css.py
+++ b/kivyblocks/widget_css.py
@@ -28,7 +28,10 @@ class WidgetCSS(object):
 		self.set_background_color()
 
 	def on_size(self, o, s):
-		super(WidgetCSS, self).on_size(o, s)
+		try:
+			super(WidgetCSS, self).on_size(o, s)
+		except:
+			pass
 		self.set_background_color()
 
 	def on_pos(self, o, p):