NPE while scanning instance methods

[isoos]

Found on pub.dev for fid_widgets 0.0.6

Unhandled exception:
NoSuchMethodError: The getter 'inheritanceManager' was called on null.
Receiver: null
Tried calling: inheritanceManager
#0      Object.noSuchMethod (dart:core-patch/object_patch.dart:53:5)
#1      Class._inheritedElements (package:dartdoc/src/model/class.dart:306:41)
#2      Class.inheritedMethods (package:dartdoc/src/model/class.dart:159:37)
#3      Class.instanceMethods (package:dartdoc/src/model/class.dart:61:45)
#4      Container.allModelElements (package:dartdoc/src/model/container.dart:39:9)
#5      Class.allModelElements (package:dartdoc/src/model/class.dart:75:17)
#6      Library.modelElementsMap.<anonymous closure> (package:dartdoc/src/model/library.dart:598:15)
#7      ExpandIterator.moveNext (dart:_internal/iterable.dart:484:31)
#8      ExpandIterator.moveNext (dart:_internal/iterable.dart:478:31)
#9      Iterable.forEach (dart:core/iterable.dart:279:23)
#10     Library.modelElementsMap (package:dartdoc/src/model/library.dart:615:15)
#11     Library.allModelElements (package:dartdoc/src/model/library.dart:630:33)
#12     PackageGraph.allModelElements.<anonymous closure>.<anonymous closure> (package:dartdoc/src/model/package_graph.dart:882:48)
#13     SetMixin.forEach (dart:collection/set.dart:148:30)
#14     PackageGraph.allModelElements.<anonymous closure> (package:dartdoc/src/model/package_graph.dart:881:18)
#15     SetMixin.forEach (dart:collection/set.dart:148:30)
#16     PackageGraph.allModelElements (package:dartdoc/src/model/package_graph.dart:875:52)
#17     PackageGraph.precacheLocalDocs (package:dartdoc/src/model/package_graph.dart:120:19)
#18     _SyncIterator.moveNext (dart:core-patch/core_patch.dart:146:23)
#19     new List.from (dart:core-patch/array_patch.dart:47:19)
#20     Iterable.toList (dart:core/iterable.dart:400:12)
#21     PackageGraph.initializePackageGraph (package:dartdoc/src/model/package_graph.dart:71:47)
#22     PubPackageBuilder.buildPackageGraph (package:dartdoc/src/model/package_builder.dart:73:20)
<asynchronous suspension>

[srawlins]

Looks like this is caused by the // in export 'src/fid_enum_picker//enum_picker.dart';

[srawlins]

There is a quick fix I intend to implement, which will just prevent dartdoc from crashing.

A more broad fix might be desired, but the behavior is correct according to the dart spec. For example, take these three libs:

// lib/src/a.dart
class C {}

// lib/b.dart
import 'src/a.dart';

f(C c) {}

// lib/c.dart
import 'src//a.dart';
import 'b.dart';

main() => f(C());

Running c.dart results in a crash:

lib/c.dart:4:13: Error: The argument type 'C/*1*/' can't be assigned to the parameter type 'C/*2*/'.
 - 'C/*1*/' is from 'package:fid_widgets/src//a.dart' ('lib/src//a.dart').
 - 'C/*2*/' is from 'package:fid_widgets/src/a.dart' ('lib/src/a.dart').
main() => f(C());
            ^