From 162bc905a656bcf98e7c6b1d11893bb85c4f4b86 Mon Sep 17 00:00:00 2001
From: Peeyush Kushwaha <peeyush.p97@gmail.com>
Date: Sat, 17 Jun 2017 13:38:04 +0530
Subject: [PATCH] Throw if both decorators decorators-stage-2 used

---
 src/index.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/index.js b/src/index.js
index 09a5c40cbe..d8e41d389a 100755
--- a/src/index.js
+++ b/src/index.js
@@ -62,6 +62,10 @@ function getParserClass(pluginsFromOptions: $ReadOnlyArray<string>): Class<Parse
     pluginList.unshift("estree");
   }
 
+  if (pluginList.indexOf("decorators") >= 0 && pluginList.indexOf("decorators-stage-2") >= 0) {
+    throw new Error("Cannot use decorators and decorators-stage-2 plugin together");
+  }
+
   const key = pluginList.join("/");
   let cls = parserClassCache[key];
   if (!cls) {