From 7739e89d63320961f00a0ccdad2690ab01d2a17b Mon Sep 17 00:00:00 2001
From: Joao Moreno <jomo@microsoft.com>
Date: Wed, 1 Nov 2017 15:37:23 +0100
Subject: [PATCH] fixes #37229

---
 .../parts/scm/electron-browser/dirtydiffDecorator.ts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/vs/workbench/parts/scm/electron-browser/dirtydiffDecorator.ts b/src/vs/workbench/parts/scm/electron-browser/dirtydiffDecorator.ts
index 3c86aff760d..be131587ccd 100644
--- a/src/vs/workbench/parts/scm/electron-browser/dirtydiffDecorator.ts
+++ b/src/vs/workbench/parts/scm/electron-browser/dirtydiffDecorator.ts
@@ -380,6 +380,10 @@ export class ShowPreviousChangeAction extends EditorAction {
 			return;
 		}
 
+		if (!controller.canNavigate()) {
+			return;
+		}
+
 		controller.previous();
 	}
 }
@@ -410,6 +414,10 @@ export class ShowNextChangeAction extends EditorAction {
 			return;
 		}
 
+		if (!controller.canNavigate()) {
+			return;
+		}
+
 		controller.next();
 	}
 }
@@ -477,6 +485,10 @@ export class DirtyDiffController implements IEditorContribution {
 		return DirtyDiffController.ID;
 	}
 
+	canNavigate(): boolean {
+		return this.currentIndex === -1 || this.model.changes.length > 1;
+	}
+
 	next(lineNumber?: number): void {
 		if (!this.assertWidget()) {
 			return;
-- 
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