Recent change to SDK breaks dartdoc assertions

[jcollins-g]

Detected in bots and in 2.0.0-dev-1.0.

documenting Dart SDK
 warning: unresolved doc reference [apply], from dart-js: (file:///usr/local/google/home/jcollins/dart/all_sdks/2.0.0-dev.1.0/lib/js/dart2js/js_dart2js.dart:88:9)
generating docs for library dart:async from async.dart...
Generation failed: 'package:dartdoc/src/model.dart': Failed assertion: line 3038 pos 12: '!name.isEmpty ||
        (this.element is TypeDefiningElement &&
            (this.element as TypeDefiningElement).type.name == "dynamic")': is not true.
dart:core                                                     _AssertionError._throwNew
package:dartdoc/src/model.dart 3038:12                        ModelElement._calculateLinkedName
package:dartdoc/src/model.dart 2744:21                        ModelElement.linkedName
package:dartdoc/src/element_type.dart 43:25                   ElementType.linkedName
package:dartdoc/src/element_type.dart 129:26                  ElementType.createLinkedReturnTypeName
package:dartdoc/src/model.dart 2034:44                        Method.linkedReturnType
dart:mirrors                                                  _LocalInstanceMirror.getField
package:mustache4dart/mustache_context.dart 335:19            _ObjectReflectorDeclaration.value
package:mustache4dart/mustache_context.dart 264:24            _ObjectReflector.[]
package:mustache4dart/mustache_context.dart 144:26            _MustacheContext._getActualValue
package:mustache4dart/mustache_context.dart 105:13            _MustacheContext._getMustachContext
package:mustache4dart/mustache_context.dart 101:12            _MustacheContext._getContextForKey
package:mustache4dart/mustache_context.dart 74:18             _MustacheContext._getInThisOrParent
package:mustache4dart/mustache_context.dart 70:12             _MustacheContext.[]
package:mustache4dart/src/tokens.dart 163:18                  _ExpressionToken.apply
package:mustache4dart/src/tokens.dart 40:18                   Token.call
package:mustache4dart/src/tmpl.dart 101:20                    _Template._write
package:mustache4dart/src/tmpl.dart 76:5                      _Template.call
package:mustache4dart/src/mustache.dart 11:64                 render
package:mustache4dart/src/tokens.dart 205:16                  _PartialToken.apply
package:mustache4dart/src/tokens.dart 280:57                  _StartSectionToken.apply.<fn>.<fn>
package:mustache4dart/src/tokens.dart 303:8                   _StartSectionToken.forEachUntilEndSection
package:mustache4dart/src/tokens.dart 280:9                   _StartSectionToken.apply.<fn>
dart:core                                                     Iterable.forEach
package:mustache4dart/src/tokens.dart 279:11                  _StartSectionToken.apply
package:mustache4dart/src/tokens.dart 293:53                  _StartSectionToken.apply.<fn>
package:mustache4dart/src/tokens.dart 303:8                   _StartSectionToken.forEachUntilEndSection
package:mustache4dart/src/tokens.dart 293:5                   _StartSectionToken.apply
package:mustache4dart/src/tokens.dart 40:18                   Token.call
package:mustache4dart/src/tmpl.dart 101:20                    _Template._write
package:mustache4dart/src/tmpl.dart 76:5                      _Template.call
package:dartdoc/src/html/html_generator_instance.dart 304:30  HtmlGeneratorInstance._build
package:dartdoc/src/html/html_generator_instance.dart 205:5   HtmlGeneratorInstance.generateClass
package:dartdoc/src/html/html_generator_instance.dart 106:9   HtmlGeneratorInstance._generateDocs
package:dartdoc/src/html/html_generator_instance.dart 47:7    HtmlGeneratorInstance.generate
package:dartdoc/src/html/html_generator.dart 74:22            HtmlGenerator.generate
package:dartdoc/dartdoc.dart 187:23                           DartDoc.generateDocs
../../dartdoc/bin/dartdoc.dart 200:44                         main.<fn>
package:stack_trace                                           Chain.capture
../../dartdoc/bin/dartdoc.dart 199:9                          main
===== asynchronous gap ===========================
dart:async                                                    _Completer.completeError
package:dartdoc/src/html/html_generator_instance.dart 56:3    HtmlGeneratorInstance.generate
===== asynchronous gap ===========================
dart:async                                                    new Future.microtask
package:dartdoc/src/html/html_generator_instance.dart 43:27   HtmlGeneratorInstance.generate
package:dartdoc/src/html/html_generator.dart 74:22            HtmlGenerator.generate
package:dartdoc/dartdoc.dart 187:23                           DartDoc.generateDocs
===== asynchronous gap ===========================
dart:async                                                    new Future.microtask
package:dartdoc/dartdoc.dart 128:47                           DartDoc.generateDocs
../../dartdoc/bin/dartdoc.dart 200:44                         main.<fn>
===== asynchronous gap ===========================
dart:async                                                    new Future.microtask
../../dartdoc/bin/dartdoc.dart 199:26                         main.<fn>
package:stack_trace                                           Chain.capture
../../dartdoc/bin/dartdoc.dart 199:9                          main

[jcollins-g]

dart-lang/sdk@38bf70d

is the root cause, here. dartdoc does not handle anonymous typed functions well. While the code will continue outside checked mode, dartdoc doesn't generate right output without #1506.