From 9c99423a780cd2460cdafaf47b134108897fba5e Mon Sep 17 00:00:00 2001
From: blob8108 <blob8108@gmail.com>
Date: Wed, 28 May 2014 21:34:32 +0100
Subject: Raise an exception for non-existent menu names

---
 blockext/blocks.py | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/blockext/blocks.py b/blockext/blocks.py
index 148866b..a58bafc 100644
--- a/blockext/blocks.py
+++ b/blockext/blocks.py
@@ -116,9 +116,13 @@ class Input(object):
         if self.default is None:
             self.default = ""
             if self.shape == "readonly-menu":
-                options = menus[self.menu]
-                if options:
-                    self.default = options[0]
+                try:
+                    options = menus[self.menu]
+                except KeyError:
+                    raise ValueError(
+                        "menu not found: {}".format(repr(self.menu))
+                    )
+                self.default = options[0]
 
 
 INPUT_SPECS = {
-- 
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