Allow linked types to refer to local executables.

pkg/analyzer/test/src/summary/resynthesize_test.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 test.src.serialization.elements_test;
 
 import 'dart:convert';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 1306 matching lines @@
   }
 
   test_class_type_parameters_f_bound_simple() {
     checkLibrary('class C<T extends U, U> {}');
   }
 
   test_classes() {
     checkLibrary('class C {} class D {}');
   }
 
+  test_closure_executable_with_return_type_from_closure() {
+    checkLibrary('''
+f() {
+  print(() {});
+  print(() => () => 0);
+}
+''');
+  }
+
   test_const_invalid_field_const() {
     constantInitializersAreInvalid = true;
     checkLibrary(
         r'''
 class C {
   static const f = 1 + foo();
 }
 int foo() => 42;
 ''',
         allowErrors: true);
@@ skipping 1470 matching lines @@
   test_inferred_type_refers_to_method_function_typed_parameter_type() {
     checkLibrary('class C extends D { void f(int x, g) {} }'
         ' abstract class D { void f(int x, int g(String s)); }');
   }
 
   test_inferred_type_refers_to_setter_function_typed_parameter_type() {
     checkLibrary('class C extends D { void set f(g) {} }'
         ' abstract class D { void set f(int g(String s)); }');
   }
 
+  test_initializer_executable_with_return_type_from_closure() {
+    checkLibrary('var v = () => 0;');
+  }
+
+  test_initializer_executable_with_return_type_from_closure_field() {
+    checkLibrary('''
+class C {
+  var v = () => 0;
+}
+''');
+  }
+
+  test_initializer_executable_with_return_type_from_closure_local() {
+    checkLibrary('''
+void f() {
+  int u = 0;
+  var v = () => 0;
+}
+''');
+  }
+
   test_library() {
     checkLibrary('');
   }
 
   test_library_documented() {
     checkLibrary('''
 // Extra comment so doc comment offset != 0
 /**
  * Docs
  */
@@ skipping 471 matching lines @@
 void named({x: 1}) {}
 ''');
   }
 
   test_parts() {
     addNamedSource('/a.dart', 'part of my.lib;');
     addNamedSource('/b.dart', 'part of my.lib;');
     checkLibrary('library my.lib; part "a.dart"; part "b.dart";');
   }
 
+  test_propagated_type_refers_to_closure() {
+    checkLibrary('''
+void f() {
+  var x = () => 0;
+  var y = x;
+}
+''');
+  }
+
   test_setter_documented() {
     checkLibrary('''
 // Extra comment so doc comment offset != 0
 /**
  * Docs
  */
 void set x(value) {}''');
   }
 
   test_setter_external() {
@@ skipping 376 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }