From f5eb98d5ae2cbba7eefe80c3893df733db092a92 Mon Sep 17 00:00:00 2001
From: rebornix <penn.lv@gmail.com>
Date: Tue, 31 Mar 2020 16:33:34 -0700
Subject: [PATCH] Fix ##93920. index in range.

---
 .../workbench/contrib/notebook/browser/notebookEditor.ts  | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/vs/workbench/contrib/notebook/browser/notebookEditor.ts b/src/vs/workbench/contrib/notebook/browser/notebookEditor.ts
index c0378bad9f4..5cc2f6a90ff 100644
--- a/src/vs/workbench/contrib/notebook/browser/notebookEditor.ts
+++ b/src/vs/workbench/contrib/notebook/browser/notebookEditor.ts
@@ -611,12 +611,20 @@ export class NotebookEditor extends BaseEditor implements INotebookEditor {
 
 	async moveCellDown(cell: ICellViewModel): Promise<void> {
 		const index = this.notebookViewModel!.getViewCellIndex(cell);
+		if (index === this.notebookViewModel!.viewCells.length - 1) {
+			return;
+		}
+
 		const newIdx = index + 1;
 		return this.moveCellToIndex(index, newIdx);
 	}
 
 	async moveCellUp(cell: ICellViewModel): Promise<void> {
 		const index = this.notebookViewModel!.getViewCellIndex(cell);
+		if (index === 0) {
+			return;
+		}
+
 		const newIdx = index - 1;
 		return this.moveCellToIndex(index, newIdx);
 	}
-- 
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