compiler: fix swap optimization analysis may cause crash

julelang · Aug 21, 2024 · b3711e3 · b3711e3
1 parent d7dc0e4
commit b3711e3
Showing 1 changed file with 2 additions and 1 deletion.
diff --git 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