Error when trying example on Flutter 0.2.8 and Dart 2.0.0

[rodydavis]

The following assertion was thrown building Builder: type '(() => void) => void' is not a subtype of type '(dynamic) => void' Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.

[rodydavis]

[flutter] flutter doctor Doctor summary (to see all details, run flutter doctor -v): [✓] Flutter (Channel beta, v0.2.8, on Mac OS X 10.13.3 17D102, locale en-US) [✓] Android toolchain - develop for Android devices (Android SDK 27.0.3) [✓] iOS toolchain - develop for iOS devices (Xcode 9.3) [✓] Android Studio (version 3.0) [✓] VS Code (version 1.22.2) [✓] Connected devices (4 available)

• No issues found! exit code 0

[ArcticZeroo]

I cannot reproduce on my Pixel 2 XL;

[√] Flutter (Channel beta, v0.2.8, on Microsoft Windows [Version 10.0.16299.371], locale en-US)
[√] Android toolchain - develop for Android devices (Android SDK 27.0.3)
[√] Android Studio (version 3.1)
[√] IntelliJ IDEA Ultimate Edition (version 2017.2)
[√] IntelliJ IDEA Ultimate Edition (version 2018.1)
[√] Connected devices (1 available)

• No issues found!

I did find an issue with the search bar package being missing from the pubspec, I don't think that would cause it though (you'd be getting an error regarding being unable to resolve the import)

Which line was that thrown on?

[rodydavis]

I think I got it to resolve, but not sure what I did. I will reopen If it happens again.