From a8ed4d0ecfed099522f61dc90fadfe6a21416438 Mon Sep 17 00:00:00 2001
From: Stepami <Stepami@mail.ru>
Date: Mon, 16 Oct 2023 22:30:36 +0300
Subject: [PATCH] fix bug sequence has no elements

---
 .../IR/Ast/Visitors/ExpressionInstructionProvider.cs        | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Interpreter.Lib/IR/Ast/Visitors/ExpressionInstructionProvider.cs b/Interpreter.Lib/IR/Ast/Visitors/ExpressionInstructionProvider.cs
index 5779e46b..dfd83b60 100644
--- a/Interpreter.Lib/IR/Ast/Visitors/ExpressionInstructionProvider.cs
+++ b/Interpreter.Lib/IR/Ast/Visitors/ExpressionInstructionProvider.cs
@@ -179,7 +179,11 @@ public AddressedInstructions Visit(AssignmentExpression visitable)
         }
 
         if (visitable.Destination.Empty())
-            result.OfType<Simple>().Last().Left = visitable.Destination.Id;
+        {
+            var lastSimple = result.OfType<Simple>().LastOrDefault();
+            if (lastSimple is not null)
+                lastSimple.Left = visitable.Destination.Id;
+        }
         else
         {
             var last = new Name(result.OfType<Simple>().Last().Left);