From 5767393c5b38d24816f6fd064cb54e982b8a9978 Mon Sep 17 00:00:00 2001
From: Johannes Rieken <johannes.rieken@gmail.com>
Date: Mon, 15 Aug 2016 15:42:24 +0200
Subject: [PATCH] clone _extraLibs before handing it out, fixes #5

---
 src/monaco.contribution.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/monaco.contribution.ts b/src/monaco.contribution.ts
index 3a9cb6aa..7850f3de 100644
--- a/src/monaco.contribution.ts
+++ b/src/monaco.contribution.ts
@@ -32,7 +32,11 @@ export class LanguageServiceDefaultsImpl implements monaco.languages.typescript.
 	}
 
 	get extraLibs(): { [path: string]: string; } {
-		return Object.freeze(this._extraLibs);
+		const result = Object.create(null);
+		for (var key in this._extraLibs) {
+			result[key] = this._extraLibs[key];
+		}
+		return Object.freeze(result);
 	}
 
 	addExtraLib(content: string, filePath?: string): IDisposable {