From 6fadb0a572ceaf2c9c5ed36166155f9df4db9da5 Mon Sep 17 00:00:00 2001
From: LPeter1997 <lenkefi.peti@gmail.com>
Date: Thu, 12 Oct 2023 14:21:01 +0200
Subject: [PATCH] Update TreeInstruction.cs

---
 .../Internal/OptimizingIr/Model/TreeInstruction.cs              | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Draco.Compiler/Internal/OptimizingIr/Model/TreeInstruction.cs b/src/Draco.Compiler/Internal/OptimizingIr/Model/TreeInstruction.cs
index c5e9e5278..2bec0cc26 100644
--- a/src/Draco.Compiler/Internal/OptimizingIr/Model/TreeInstruction.cs
+++ b/src/Draco.Compiler/Internal/OptimizingIr/Model/TreeInstruction.cs
@@ -31,6 +31,8 @@ internal sealed class TreeInstruction : InstructionBase, IOperand, IValueInstruc
 
     public TreeInstruction(IValueInstruction underlying, ImmutableArray<IOperand> operands)
     {
+        if (underlying is TreeInstruction) throw new ArgumentOutOfRangeException(nameof(underlying));
+
         this.Underlying = underlying;
         this.Operands = operands;
     }