Compute bounds of type variables.

pkg/front_end/lib/src/fasta/kernel/kernel_target.dart

 // Copyright (c) 2016, 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 fasta.kernel_target;
 
 import 'dart:async' show
     Future;
 
 import 'dart:io' show
@@ skipping 239 matching lines @@
       await loader.buildOutlines();
       loader.resolveParts();
       loader.computeLibraryScopes();
       loader.resolveTypes();
       loader.buildProgram();
       loader.checkSemantics();
       List<SourceClassBuilder> sourceClasses = collectAllSourceClasses();
       installDefaultSupertypes(sourceClasses);
       installDefaultConstructors(sourceClasses);
       loader.resolveConstructors();
+      loader.finishTypeVariables(objectClassBuilder);
       program = link(new List<Library>.from(loader.libraries));
       if (uri == null) return program;
       return await writeLinkedProgram(uri, program, isFullProgram: false);
     } on InputError catch (e) {
       return handleInputError(uri, e, isFullProgram: false);
     } catch (e, s) {
       return reportCrash(e, s, loader?.currentUriForCrashReporting);
     }
   }
 
@@ skipping 320 matching lines @@
     superclass = superclass.superclass;
   }
   for (Constructor constructor in superclass.constructors) {
     if (constructor.name.name.isEmpty) {
       return constructor.function.requiredParameterCount == 0 ?
           constructor : null;
     }
   }
   return null;
 }