From f1754a3b261f92ca906a4a3a7fb81474254e24b3 Mon Sep 17 00:00:00 2001
From: Alexandru Dima <alexdima@microsoft.com>
Date: Wed, 23 Dec 2020 14:32:45 +0100
Subject: [PATCH] Fix potential NPE

---
 src/languageFeatures.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/languageFeatures.ts b/src/languageFeatures.ts
index 743333de..15598e9a 100644
--- a/src/languageFeatures.ts
+++ b/src/languageFeatures.ts
@@ -104,7 +104,10 @@ export class DiagnosticsAdapter {
 			.then((worker) => {
 				return worker.doValidation(resource.toString()).then((diagnostics) => {
 					const markers = diagnostics.map((d) => toDiagnostics(resource, d));
-					editor.setModelMarkers(editor.getModel(resource), languageId, markers);
+					const model = editor.getModel(resource);
+					if (model && model.getModeId() === languageId) {
+						editor.setModelMarkers(model, languageId, markers);
+					}
 				});
 			})
 			.then(undefined, (err) => {