From 0d605987656a91cbc64c27deacf98e3f33c61d00 Mon Sep 17 00:00:00 2001
From: Joao Moreno <joao.moreno@microsoft.com>
Date: Tue, 10 Jul 2018 10:02:45 +0200
Subject: [PATCH] safeguard list splice calls

related to #53773
---
 src/vs/base/browser/ui/list/listWidget.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/vs/base/browser/ui/list/listWidget.ts b/src/vs/base/browser/ui/list/listWidget.ts
index d297818a787..acdcb44f5d8 100644
--- a/src/vs/base/browser/ui/list/listWidget.ts
+++ b/src/vs/base/browser/ui/list/listWidget.ts
@@ -929,6 +929,14 @@ export class List<T> implements ISpliceable<T>, IDisposable {
 	}
 
 	splice(start: number, deleteCount: number, elements: T[] = []): void {
+		if (start < 0 || start > this.view.length) {
+			throw new Error(`Invalid start index: ${start}`);
+		}
+
+		if (deleteCount < 0) {
+			throw new Error(`Invalid delete count: ${deleteCount}`);
+		}
+
 		if (deleteCount === 0 && elements.length === 0) {
 			return;
 		}