Always set correspondingStaticParameters and correspondingPropagatedParameters, to clear when we don

pkg/analyzer/lib/src/generated/element_resolver.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.src.generated.element_resolver;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 680 matching lines @@
     // as they are used in propagatedType downwards inference of lambda
     // parameters. So we don't want to clear the propagatedInvokeType variable.
     //
     node.propagatedInvokeType =
         _propagatedInvokeTypeIfBetter(propagatedInvokeType, staticInvokeType);
 
     ArgumentList argumentList = node.argumentList;
     if (staticInvokeType != null) {
       List<ParameterElement> parameters =
           _computeCorrespondingParameters(argumentList, staticInvokeType);
-      if (parameters != null) {
-        argumentList.correspondingStaticParameters = parameters;
-      }
+      argumentList.correspondingStaticParameters = parameters;
     }
     if (propagatedInvokeType != null) {
       List<ParameterElement> parameters =
           _computeCorrespondingParameters(argumentList, propagatedInvokeType);
-      if (parameters != null) {
-        argumentList.correspondingPropagatedParameters = parameters;
-      }
+      argumentList.correspondingPropagatedParameters = parameters;
     }
     //
     // Then check for error conditions.
     //
     ErrorCode errorCode = _checkForInvocationError(target, true, staticElement);
     bool generatedWithTypePropagation = false;
     if (_enableHints && errorCode == null && staticElement == null) {
       // The method lookup may have failed because there were multiple
       // incompatible choices. In this case we don't want to generate a hint.
       errorCode = _checkForInvocationError(target, false, propagatedElement);
@@ skipping 1873 matching lines @@
 
   @override
   Element get staticElement => null;
 
   @override
   dynamic/*=E*/ accept/*<E>*/(AstVisitor/*<E>*/ visitor) => null;
 
   @override
   void visitChildren(AstVisitor visitor) {}
 }