Waiting for observatory port to be available... stuck forever

[jlubeck]

I just upgraded my flutter master branch and now I cannot run my apps on the iOS simulator anymore. It's stuck on that observatory message forever.

Please see attached file for full logs since they are too long to include in the comment
output.txt

Logs

[✓] Flutter (Channel master, 2.3.0-1.0.pre.156, on macOS 11.2.3 20D91 darwin-x64, locale en-US)
    • Flutter version 2.3.0-1.0.pre.156 at /Users/jan/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 91de4bd3e3 (29 minutes ago), 2021-04-28 12:51:27 -0700
    • Engine revision d0688da4b1
    • Dart version 2.14.0 (build 2.14.0-48.0.dev)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /Users/jan/Library/Android/sdk
    • Platform android-30, build-tools 29.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.4, Build version 12D4e
    • CocoaPods version 1.10.0

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)

[✓] VS Code (version 1.55.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.21.0

[pedromassangocode]

Related to #81196.

[darshankawar]

Considering the age of this issue and lack of any activity since the issue was filed and also based on the verification that this issue doesn't occur anymore using latest master and stable version of framework on iOS simulator, I am going ahead and closing this issue as stale.
@jlubeck If you see same issue using latest master version, please open a new issue.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.