aqueduct document crashes

[poznanski]

aqueduct crashes when trying to generate OpenAPI client web page

aqueduct document client
-- Aqueduct CLI Version: 4.0.0-b1
-- Aqueduct project version: 4.0.0-b1
*** Uncaught error
Bad state: NoSuchMethodError: The method 'map' was called on null.
Receiver: null
Tried calling: map<String, dynamic>(Closure: (dynamic, dynamic) => MapEntry<String, dynamic>)
**** Stacktrace

• #0 Object.noSuchMethod (dart:core-patch/object_patch.dart:53:5)
• Build authentication adapter #1 new Configuration.fromString (package:safe_config/src/configuration.dart:23:17)
• Ensure application startup completes across isolates #2 new Configuration.fromFile (package:safe_config/src/configuration.dart:30:44)
• Documentation for application, controllers, router #3 new BumpConfig (package:parkio_bump_server/channel.dart:37:34)
• Allow resource controller endpoints to take query params as optional arguments #4 ParkioBumpServerChannel.prepare (package:parkio_bump_server/channel.dart:12:20)
• Ensure that path parameters from the router are parsed into the type the handler expects #5 Application.document (package:aqueduct/src/application/application.dart:165:26)
• Create API documentation intermediate file format #6 OpenAPIBuilder.execute (data:application/dart:17:1821)
• Integrate code coverage tool for tests #7 main (data:application/dart:13:35)
• Create Postman file from intermediate documentation #8 _startIsolate. (dart:isolate-patch/isolate_patch.dart:297:32)
• Create Swagger API specification generated from intermediate format #9 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)

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[owczaro]

@poznanski, after upgrading dart to the newest version I had similar problem, but during aqueduct db generate. Try to add pub run before all aqueduct commands. It's temporary solution, but works though

[poznanski]

after downgrading aqueduct version I got a meaningful error message about my classes, unfortunately I did not saved it. Anyway, I guess it is a problem of error reporting. If maintainers want, they can close the issue. Thanks.