Fix for typedef-typed field formal parameter.

pkg/analyzer/lib/src/summary/summarize_elements.dart

 // Copyright (c) 2015, 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 serialization.elements;
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/dart/element/type.dart';
 import 'package:analyzer/src/generated/resolver.dart';
@@ skipping 429 matching lines @@
     }
     pb.units = prelinkedUnits;
     pb.dependencies = dependencies;
     pb.importDependencies = prelinkedImports;
     return pb;
   }
 
   /**
    * Serialize the given [parameter] into an [UnlinkedParam].
    */
-  UnlinkedParamBuilder serializeParam(ParameterElement parameter) {
+  UnlinkedParamBuilder serializeParam(ParameterElement parameter,
+      [Element context]) {
+    context ??= parameter;
     UnlinkedParamBuilder b = new UnlinkedParamBuilder(ctx);
     b.name = parameter.name;
     switch (parameter.parameterKind) {
       case ParameterKind.REQUIRED:
         b.kind = UnlinkedParamKind.required;
         break;
       case ParameterKind.POSITIONAL:
         b.kind = UnlinkedParamKind.positional;
         break;
       case ParameterKind.NAMED:
         b.kind = UnlinkedParamKind.named;
         break;
     }
     b.isInitializingFormal = parameter.isInitializingFormal;
     DartType type = parameter.type;
     if (type is FunctionType) {
       b.isFunctionTyped = true;
       if (!type.returnType.isVoid) {
         b.type = serializeTypeRef(type.returnType, parameter);
       }
-      b.parameters = type.parameters.map(serializeParam).toList();
+      b.parameters = type.parameters
+          .map((parameter) => serializeParam(parameter, context))
+          .toList();
     } else {
-      b.type = serializeTypeRef(type, parameter);
+      b.type = serializeTypeRef(type, context);
       b.hasImplicitType = parameter.hasImplicitType;
     }
     return b;
   }
 
   /**
    * Serialize the given [prefix] into an index into the references table.
    */
   int serializePrefix(PrefixElement element) {
     return referenceMap.putIfAbsent(element, () {
@@ skipping 116 matching lines @@
     UnlinkedVariableBuilder b = new UnlinkedVariableBuilder(ctx);
     b.name = variable.name;
     b.type = serializeTypeRef(variable.type, variable);
     b.isStatic = variable.isStatic && variable.enclosingElement is ClassElement;
     b.isFinal = variable.isFinal;
     b.isConst = variable.isConst;
     b.hasImplicitType = variable.hasImplicitType;
     return b;
   }
 }