From b3711e3eb209797f2f550139681a214af60f5bd3 Mon Sep 17 00:00:00 2001
From: mertcandav <mertcandav@outlook.com>
Date: Wed, 21 Aug 2024 12:40:30 +0300
Subject: [PATCH] compiler: fix swap optimization analysis may cause crash

---
 src/julec/opt/scope.jule | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/julec/opt/scope.jule b/src/julec/opt/scope.jule
index ab669d8c6..e5b22f597 100644
--- a/src/julec/opt/scope.jule
+++ b/src/julec/opt/scope.jule
@@ -454,7 +454,8 @@ impl scopeOptimizer {
     }
 
     fn tryOptimizeSwap(mut &self, mut &assign: &MultiAssign): bool {
-        if !Assign || len(assign.L) != 2 {
+        if !Assign || len(assign.L) != 2 ||
+            assign.L[0] == nil || assign.L[1] == nil {
             ret false
         }
         let mut tup: &TupleExprModel