Update TreeInstruction.cs

Draco-lang · Oct 12, 2023 · 6fadb0a · 6fadb0a
1 parent 13db761
commit 6fadb0a
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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;
     }