From 2801838ffa0b5a99ccc6c2204397ff84a507f45b Mon Sep 17 00:00:00 2001
From: Nick O'Leary <nick.oleary@gmail.com>
Date: Thu, 21 Apr 2016 22:24:59 +0100
Subject: [PATCH] Throw an error if a Function node adds an input event
 listener

---
 nodes/core/core/80-function.js         | 3 +++
 nodes/core/locales/en-US/messages.json | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/nodes/core/core/80-function.js b/nodes/core/core/80-function.js
index 5eb96b1bf..224c1f8e2 100644
--- a/nodes/core/core/80-function.js
+++ b/nodes/core/core/80-function.js
@@ -83,6 +83,9 @@ module.exports = function(RED) {
                     sendResults(node, id, msgs);
                 },
                 on: function() {
+                    if (arguments[0] === "input") {
+                        throw new Error(RED._("function.error.inputListener"));
+                    }
                     node.on.apply(node, arguments);
                 },
                 status: function() {
diff --git a/nodes/core/locales/en-US/messages.json b/nodes/core/locales/en-US/messages.json
index c8c6bff1d..7d31ec2ab 100644
--- a/nodes/core/locales/en-US/messages.json
+++ b/nodes/core/locales/en-US/messages.json
@@ -141,6 +141,9 @@
             "function": "Function",
             "outputs": "Outputs"
         },
+        "error": {
+            "inputListener":"Cannot add listener to 'input' event within Function"
+        },
         "tip": "See the Info tab for help writing functions."
     },
     "template": {