From 3155a06129a22fe33258e4e23293428157b23efa Mon Sep 17 00:00:00 2001
From: Martin Aeschlimann <martinae@microsoft.com>
Date: Mon, 26 Jun 2017 15:14:29 +0800
Subject: [PATCH] TypeError: Cannot read property 'getText' of null. Fixes
 Microsoft/monaco-editor#354

---
 src/jsonWorker.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/jsonWorker.ts b/src/jsonWorker.ts
index f826609b..bce6ff27 100644
--- a/src/jsonWorker.ts
+++ b/src/jsonWorker.ts
@@ -63,8 +63,11 @@ export class JSONWorker {
 
     doValidation(uri: string): Thenable<ls.Diagnostic[]> {
 		let document = this._getTextDocument(uri);
-		let jsonDocument = this._languageService.parseJSONDocument(document);
-		return this._languageService.doValidation(document, jsonDocument);
+		if (document) {
+			let jsonDocument = this._languageService.parseJSONDocument(document);
+			return this._languageService.doValidation(document, jsonDocument);
+		}
+		return Promise.as([]);
 	}
     doComplete(uri: string, position: ls.Position): Thenable<ls.CompletionList> {
 		let document = this._getTextDocument(uri);