From 9fcd3f7920795fd02415dc82cca3498f443f06e6 Mon Sep 17 00:00:00 2001
From: u9g <git@u9g.dev>
Date: Thu, 3 Mar 2022 18:04:03 -0500
Subject: [PATCH] Spreadsheet: Prevent infinite loop in Range ctor

---
 Base/res/js/Spreadsheet/runtime.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Base/res/js/Spreadsheet/runtime.js b/Base/res/js/Spreadsheet/runtime.js
index dc1b7fda01..5bff2f269b 100644
--- a/Base/res/js/Spreadsheet/runtime.js
+++ b/Base/res/js/Spreadsheet/runtime.js
@@ -187,6 +187,10 @@ class Range {
         // 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");
+        if (typeof startingRow === "string" || typeof endingRow === "string")
+            throw new Error(
+                "startingRow or endingRow is a string, this will cause an infinite loop"
+            );
         this.startingColumnName = startingColumnName;
         this.endingColumnName = endingColumnName;
         this.startingRow = startingRow;