From 407be8f0dc92de45b5669de5e8ce05d857702001 Mon Sep 17 00:00:00 2001
From: Daniel Imms <2193314+Tyriar@users.noreply.github.com>
Date: Tue, 15 Jun 2021 03:34:45 -0700
Subject: [PATCH] Add better checks for start index and length

---
 src/vs/workbench/api/common/extHostTypes.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/vs/workbench/api/common/extHostTypes.ts b/src/vs/workbench/api/common/extHostTypes.ts
index 2ed9688c95d..87d45f2f0ae 100644
--- a/src/vs/workbench/api/common/extHostTypes.ts
+++ b/src/vs/workbench/api/common/extHostTypes.ts
@@ -1713,10 +1713,10 @@ export class TerminalLink implements vscode.TerminalLink {
 		public length: number,
 		public tooltip?: string
 	) {
-		if (typeof startIndex !== 'number') {
+		if (typeof startIndex !== 'number' || startIndex < 0) {
 			throw illegalArgument('startIndex');
 		}
-		if (typeof length !== 'number') {
+		if (typeof length !== 'number' || length < 1) {
 			throw illegalArgument('length');
 		}
 		if (tooltip !== undefined && typeof tooltip !== 'string') {