Run closed_world2_test using the normal compiler pipeline.

pkg/compiler/lib/src/deferred_load.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 deferred_load;
 
 import 'common/tasks.dart' show CompilerTask;
 import 'common.dart';
 import 'compiler.dart' show Compiler;
 import 'constants/expressions.dart' show ConstantExpression;
@@ skipping 643 matching lines @@
       hunksToLoad[importDeferName[import]] = new List<OutputUnit>();
       for (OutputUnit outputUnit in sortedOutputUnits) {
         if (outputUnit == mainOutputUnit) continue;
         if (outputUnit.imports.contains(import)) {
           hunksToLoad[importDeferName[import]].add(outputUnit);
         }
       }
     }
   }
 
-  void onResolutionComplete(FunctionElement main) {
+  void onResolutionComplete(MethodElement main) {
     if (!isProgramSplit) {
       allOutputUnits.add(mainOutputUnit);
       return;
     }
     if (main == null) return;
     LibraryElement mainLibrary = main.library;
     _importedDeferredBy = new Map<_DeferredImport, Set<Element>>();
     _constantsDeferredBy = new Map<_DeferredImport, Set<ConstantValue>>();
     _importedDeferredBy[_fakeMainImport] = _mainElements;
 
     reporter.withCurrentElement(
         mainLibrary,
         () => measure(() {
               // Starting from main, traverse the program and find all
               // dependencies.
-              _mapDependencies(
-                  element: compiler.mainFunction, import: _fakeMainImport);
+              _mapDependencies(element: main, import: _fakeMainImport);
 
               // Also add "global" dependencies to the main OutputUnit.  These
               // are things that the backend needs but cannot associate with a
               // particular element, for example, startRootIsolate.  This set
               // also contains elements for which we lack precise information.
               for (MethodElement element
                   in _backendUsage.globalFunctionDependencies) {
                 _mapDependencies(
                     element: element.implementation, import: _fakeMainImport);
               }
@@ skipping 72 matching lines @@
               // Generate a unique name for each OutputUnit.
               _assignNamesToOutputUnits(allOutputUnits);
             }));
     // Notify the impact strategy impacts are no longer needed for deferred
     // load.
     compiler.impactStrategy.onImpactUsed(IMPACT_USE);
   }
 
   void beforeResolution(Compiler compiler) {
     if (compiler.mainApp == null) return;
+    // TODO(johnniwinther): Support deferred load for kernel based elements.
+    if (compiler.mainApp is! LibraryElement) return;

[Siggi Cherem (dart-lang), 2017/04/26 16:39:18]

to make this easier to read, I'd switch this to:

if (compiler.options.loadDill) return; 

[Johnni Winther, 2017/04/27 06:50:14]

Done.

     _allDeferredImports[_fakeMainImport] = compiler.mainApp;
     var lastDeferred;
     // When detecting duplicate prefixes of deferred libraries there are 4
     // cases of duplicate prefixes:
     // 1.
     // import "lib.dart" deferred as a;
     // import "lib2.dart" deferred as a;
     // 2.
     // import "lib.dart" deferred as a;
     // import "lib2.dart" as a;
@@ skipping 290 matching lines @@
 
   bool operator ==(other) {
     if (other is! _DeclaredDeferredImport) return false;
     return declaration == other.declaration;
   }
 
   int get hashCode => declaration.hashCode * 17;
 
   String toString() => '$declaration';
 }