From 8dc1053aab549d8c9d39d25072be0715428646a6 Mon Sep 17 00:00:00 2001
From: mattyod <mattyod@gmail.com>
Date: Thu, 20 Aug 2015 14:57:38 +0100
Subject: [PATCH] Check index is not negative.

---
 lib/rules/prop-types.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/rules/prop-types.js b/lib/rules/prop-types.js
index ec909f2792..b4d77ddc3f 100644
--- a/lib/rules/prop-types.js
+++ b/lib/rules/prop-types.js
@@ -580,7 +580,9 @@ module.exports = function(context) {
         }
       }
 
-      markPropTypesAsDeclared(node, node.value.body.body[i].argument);
+      if (i >= 0) {
+        markPropTypesAsDeclared(node, node.value.body.body[i].argument);
+      }
     },
 
     ObjectExpression: function(node) {