From b3591d28dff59efb9c6465f14b8ed1d082a54262 Mon Sep 17 00:00:00 2001
From: u9g <git@u9g.dev>
Date: Sun, 20 Feb 2022 15:25:35 -0500
Subject: [PATCH] Spreadsheet: Prevent infinite loop in Range ctor

---
 Base/res/js/Spreadsheet/runtime.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Base/res/js/Spreadsheet/runtime.js b/Base/res/js/Spreadsheet/runtime.js
index ac0218db0d42d5..758ea24fd40b19 100644
--- a/Base/res/js/Spreadsheet/runtime.js
+++ b/Base/res/js/Spreadsheet/runtime.js
@@ -162,6 +162,9 @@ class Ranges {
 
 class Range {
     constructor(startingColumnName, endingColumnName, startingRow, endingRow, columnStep, rowStep) {
+        // using == to account for '0' since js will parse `+'0'` to 0
+        if (columnStep == 0 || rowStep == 0)
+            throw new Error("rowStep or columnStep is 0, this will cause an infinite loop");
         this.startingColumnName = startingColumnName;
         this.endingColumnName = endingColumnName;
         this.startingRow = startingRow;