From 8957add5ebda170b251cd55cd49dcf724cc526bd Mon Sep 17 00:00:00 2001
From: Sandeep Somavarapu <sasomava@microsoft.com>
Date: Tue, 21 Feb 2017 10:28:50 +0100
Subject: [PATCH] Fix #20748

---
 .../workbench/parts/preferences/common/preferencesModels.ts   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/vs/workbench/parts/preferences/common/preferencesModels.ts b/src/vs/workbench/parts/preferences/common/preferencesModels.ts
index 4814c92369c..fa76bc4e18d 100644
--- a/src/vs/workbench/parts/preferences/common/preferencesModels.ts
+++ b/src/vs/workbench/parts/preferences/common/preferencesModels.ts
@@ -381,7 +381,9 @@ export class SettingsEditorModel extends AbstractSettingsModel implements ISetti
 				}
 			}
 		};
-		visit(model.getValue(), visitor);
+		if (!model.isDisposed()) {
+			visit(model.getValue(), visitor);
+		}
 		this._settingsGroups = settings.length > 0 ? [<ISettingsGroup>{
 			sections: [
 				{