From c332a2e4e07fc43e9ca382fd6e5ba50108ddf1ef Mon Sep 17 00:00:00 2001
From: Johannes Rieken <johannes.rieken@gmail.com>
Date: Thu, 9 Feb 2017 16:15:48 +0100
Subject: [PATCH] return `undefined` from detached editor, #18797

---
 src/vs/workbench/api/node/extHostEditors.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/vs/workbench/api/node/extHostEditors.ts b/src/vs/workbench/api/node/extHostEditors.ts
index 65dab5d9218..2b948c2700d 100644
--- a/src/vs/workbench/api/node/extHostEditors.ts
+++ b/src/vs/workbench/api/node/extHostEditors.ts
@@ -501,7 +501,9 @@ class ExtHostTextEditor implements vscode.TextEditor {
 	// ---- the document
 
 	get document(): vscode.TextDocument {
-		return this._documentData.document;
+		return this._documentData
+			? this._documentData.document
+			: undefined;
 	}
 
 	set document(value) {