AST list refactoring

Src/AST/Myc.Ast.Compiler.Binder.Upvalues.pas

@@ -195,6 +195,7 @@ function TUpvalueAnalyzer.VisitLambdaExpression(const Node: IAstNode): IAstNode;
 var
     L: ILambdaExpressionNode;
     i: Integer;
+    paramTuple: ITupleNode;
 begin
     L := Node.AsLambdaExpression;
 
@@ -204,9 +205,11 @@ begin
         // 2. Register parameters (they mask outer variables)
         // We pass 'nil' as the node because we currently don't box parameters,
         // but we must ensure Resolve() finds them so we don't accidentally box a shadowed variable.
-        for i := 0 to L.Parameters.Count - 1 do
+        paramTuple := L.Parameters;
+        for i := 0 to paramTuple.Count - 1 do
         begin
-            FCurrentScope.Define(L.Parameters[i].Name, nil);
+            if paramTuple.Items[i].Kind = akIdentifier then
+                FCurrentScope.Define(paramTuple.Items[i].AsIdentifier.Name, nil);
         end;
 
         // 3. Visit Body