Webdev failed with an unexpected exception (Dart SDK 2.0.0-dev.69.1)

Issue

1. I have updated Dart SDK to 2.0.0-dev.69.1 version.

2. Also, I hace updated my pubspec.yaml file to this:

   environment:
       sdk: '>=2.0.0-dev.69.1 <2.0.0'
   
   dependencies:
       sass_builder: ^2.1.1
       angular: ^5.0.0-beta+2
       angular_components: ^0.9.0-beta
       angular_forms: ^2.0.0-beta+2
       angular_router: ^2.0.0-alpha+17
       js: ^0.6.1+1
       path: ^1.6.2
   
   dev_dependencies:
       angular_test: ^2.0.0-beta+2
       build_runner: ^0.9.2
       build_test: ^0.10.3+1
       build_web_compilers: ^0.4.1
       test: ^1.3.0
   

3. I run the command pub global activate webdev.

⚠ After these steps, I tried to run webdev serve command. I receive this error message:

webdev failed with an unexpected exception.
Unable to spawn isolate: file:///C:/Users/marco/AppData/Roaming/Pub/Cache/hosted/pub.dartlang.org/analyzer-0.32.3/lib/src/dart/analysis/library_context.dart:96:34: Error: Can't return a value from a void function.
        return appendLibraryFiles(targetLibrary);
                                 ^

❔ Did you also find the same problem? How can I solve this problem?

Thanks!

Solution

There is an issue with SDK 2.0.0-dev.69.1 — see this announcement. I’m not sure if it is related, but you might need to wait for the next release of the SDK, or downgrade to 2.0.0-dev.69.0.

Answered By – Patrice Chalin

Answer Checked By – Willingham (FlutterFixes Volunteer)