From 53d2dc4045f6793d166b2806d7726c45cdea74e4 Mon Sep 17 00:00:00 2001
From: Christian Heimes <christian@cheimes.de>
Date: Mon, 22 Jul 2013 10:30:14 +0200
Subject: Add sanity check to PyGrammar_LabelRepr() in order to catch invalid
 tokens when debugging a new grammar. CID 715360

---
 Parser/grammar1.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Parser/grammar1.c b/Parser/grammar1.c
index 1f7d264..17e2ba9 100644
--- a/Parser/grammar1.c
+++ b/Parser/grammar1.c
@@ -45,7 +45,7 @@ PyGrammar_LabelRepr(label *lb)
         else
             return lb->lb_str;
     }
-    else {
+    else if (lb->lb_type < N_TOKENS) {
         if (lb->lb_str == NULL)
             return _PyParser_TokenNames[lb->lb_type];
         else {
@@ -54,4 +54,7 @@ PyGrammar_LabelRepr(label *lb)
             return buf;
         }
     }
+    else {
+        Py_FatalError("invalid label");
+    }
 }
-- 
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