From e074e2e28f6193730757830561ddd551c4b52a19 Mon Sep 17 00:00:00 2001
From: Walter Bender <walter@sugarlabs.org>
Date: Fri, 15 Oct 2010 18:38:50 +0000
Subject: catch KeyError when indexing BLOCK_NAME list (#2447)

---
diff --git a/TurtleArt/tablock.py b/TurtleArt/tablock.py
index db9ef0b..b797ada 100644
--- a/TurtleArt/tablock.py
+++ b/TurtleArt/tablock.py
@@ -363,7 +363,11 @@ class Block:
             if n == 0:
                 n = 1 # Force a scale to be set, even if there is no value.
         else:
-            n = len(BLOCK_NAMES[self.name])
+            if self.name in BLOCK_NAMES:
+                n = len(BLOCK_NAMES[self.name])
+            else:
+                _logger.debug("WARNING: unknown block name %s" % (self.name))
+            n = 0
         for i in range(n):
             if i == 1: # top
                 self.spr.set_label_attributes(int(self._font_size[1] + 0.5),
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