The method 'retype' isn't defined for the class 'Stream<T>' (rx-dart)

Question

I have a flutter project, i upgraded flutter to the latest version. Then suddenly the application stopped building and gives the error in the question.

Ive tried

flutter clean
flutter packages upgrade
flutter packages get
flutter doctor

Flutter doctor shows no errors

/Users/mac/Desktop/code/flutter/flutter/bin/flutter --no-color doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel master, v0.5.6-pre.30, on Mac OS X 10.13.4 17E199, 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 3.1)
[✓] Connected devices (1 available)

• No issues found!
Process finished with exit code 0

Any ideas as to why the project isn't building?

Answer 1

You need to upgrade rxdart to the newest 0.18.0 version that works with the Dart version included in the Flutter version you are using.