From 68250f7e4e459b85eb655ec945f6ad36b8e254a7 Mon Sep 17 00:00:00 2001
From: Ed Kolis <edkolis@gmail.com>
Date: Sat, 3 Feb 2024 00:23:45 -0500
Subject: [PATCH] Fix crash when adding components to a design (#282)

---
 FrEee/Objects/Technology/MountedComponentTemplate.cs | 3 ++-
 FrEee/Utility/HashCodeMasher.cs                      | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/FrEee/Objects/Technology/MountedComponentTemplate.cs b/FrEee/Objects/Technology/MountedComponentTemplate.cs
index 0ce1ec71..13f3d68d 100644
--- a/FrEee/Objects/Technology/MountedComponentTemplate.cs
+++ b/FrEee/Objects/Technology/MountedComponentTemplate.cs
@@ -359,7 +359,8 @@ public override bool Equals(object? obj)
 
 	public override int GetHashCode()
 	{
-		return HashCodeMasher.Mash(Container, ComponentTemplate, Mount);
+		// can't mash the container itself because that would cause a circular dependency on this template
+		return HashCodeMasher.Mash(Container?.ID, ComponentTemplate, Mount);
 	}
 
 	/// <summary>
diff --git a/FrEee/Utility/HashCodeMasher.cs b/FrEee/Utility/HashCodeMasher.cs
index 4c629f84..762a4fce 100644
--- a/FrEee/Utility/HashCodeMasher.cs
+++ b/FrEee/Utility/HashCodeMasher.cs
@@ -8,7 +8,7 @@ namespace FrEee.Utility;
 /// </summary>
 public static class HashCodeMasher
 {
-	public static int Mash(params object[] objs)
+	public static int Mash(params object?[] objs)
 	{
 		return MashList(objs);
 	}