From b04814cca72333e5df59a3dafd4ded6c14236ef7 Mon Sep 17 00:00:00 2001
From: Mark Tolmacs <mark@lazycat.hu>
Date: Sat, 21 Jun 2025 17:47:15 +0200
Subject: [PATCH] Fix crash for elbow arrws in mutateElement()

---
 packages/element/src/typeChecks.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/element/src/typeChecks.ts b/packages/element/src/typeChecks.ts
index ab7a1935f..af031a241 100644
--- a/packages/element/src/typeChecks.ts
+++ b/packages/element/src/typeChecks.ts
@@ -362,6 +362,7 @@ export const isFixedPointBinding = (
   binding: PointBinding | FixedPointBinding,
 ): binding is FixedPointBinding => {
   return (
+    binding != null &&
     Object.hasOwn(binding, "fixedPoint") &&
     (binding as FixedPointBinding).fixedPoint != null
   );