flutter_01.log

Flutter crash report.
Please report a bug at https://github.com/flutter/flutter/issues.

## command

flutter --no-color attach --machine --device-id=emulator-5554 lib/main.dart

## exception

StateError: Bad state: Future already completed

```
#0      _AsyncCompleter.complete (dart:async/future_impl.dart:43:31)
#1      DartDevelopmentService.startDartDevelopmentService (package:flutter_tools/src/base/dds.dart:56:18)
<asynchronous suspension>
#2      FlutterDevice.connect.<anonymous closure> (package:flutter_tools/src/resident_runner.dart:239:11)
<asynchronous suspension>
```

## flutter doctor

```
[✓] Flutter (Channel master, 1.24.0-8.0.pre.236, on macOS 11.0.1 20B50 darwin-x64, locale de-AT)
    • Flutter version 1.24.0-8.0.pre.236 at /Users/jonasschweigler/Developer/flutter
    • Framework revision f7811ea541 (5 weeks ago), 2020-11-13 11:16:50 -0800
    • Engine revision bbcf19ad14
    • Dart version 2.12.0 (build 2.12.0-38.0.dev)

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    • Android SDK at /Users/jonasschweigler/Library/Android/sdk
    • Platform android-30, build-tools 30.0.2
    • 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 12.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.2, Build version 12B45b
    • CocoaPods version 1.10.0

[✓] 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)

[✓] Connected device (1 available)
    • AOSP on IA Emulator (mobile) • emulator-5554 • android-x86 • Android 9 (API 28) (emulator)

• No issues found!
```