From 30028d772bdcc33bd8ee444e18b769ecca7f880a Mon Sep 17 00:00:00 2001
From: Walter Bender <walter.bender@gmail.com>
Date: Sat, 12 Nov 2011 15:13:58 +0000
Subject: added call to find_value_blocks in erase button callback to catch corner case

---
diff --git a/TurtleArt/tawindow.py b/TurtleArt/tawindow.py
index 7c56196..c7d6cbf 100644
--- a/TurtleArt/tawindow.py
+++ b/TurtleArt/tawindow.py
@@ -442,6 +442,7 @@ class TurtleArtWindow():
         """ Eraser_button (hide status block when clearing the screen.) """
         if self.status_spr is not None:
             self.status_spr.hide()
+        self.lc.find_value_blocks()  # Are there blocks to update?
         self.lc.prim_clear()
         self.display_coordinates()
 
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