Exception processing event: Flutter.RebuiltWidgets

Thanks for the feedback! If your issue is related to the Flutter framework itself,
please open an issue at
[github.com/flutter/flutter](https://github.com/flutter/flutter/issues/new).

## Steps to Reproduce

1. Clone the sloth_app at https://github.com/filiph/sloth_app/commit/5e4e5f73776812fd29f2deff294e804d1753571f
2. Open in Android Studio
3. Run in debug mode
4. Turn on the "Show widget rebuild information" feature
5. Navigate to the fourth screen (the app is a PageView, so just swipe right 3 times)
6. Look into the console

#### Expected

The widget rebuild info continues working

#### Actual

I get the error below, and the widget rebuild panel doesn't update.

## Logs

```
Launching lib/main.dart on Pixel 2 XL in debug mode...
Running Gradle task 'assembleDebug'...
✓ Built build/app/outputs/apk/debug/app-debug.apk.
Syncing files to device Pixel 2 XL...
Exception processing event: Extension, {"type":"Event","kind":"Extension","extensionKind":"Flutter.RebuiltWidgets","isolate":{"type":"@Isolate","id":"isolates/3734909494352719","name":"main","number":"3734909494352719"},"timestamp":1579689893650,"extensionData":{"startTime":7472203,"events":[88,1,89,1,90,1,91,1,103,1,104,1,105,1,106,1,110,19],"newLocations":{"file:///Users/filiph/dev/performance_test_app/lib/main.dart":[88,39,11],"file:///Users/filiph/dev/performance_test_app/lib/src/green.dart":[89,37,12,91,41,11,103,43,20,104,46,11,105,47,20,106,52,26,110,59,34],"file:///Users/filiph/dev/performance_test_app/lib/src/rounded_card.dart":[90,13,12]}}}
```

## Version info

```
$ flutter doctor -v
[✓] Flutter (Channel stable, v1.12.13+hotfix.5, on Mac OS X 10.14.6 18G2022,
locale en-US)
• Flutter version 1.12.13+hotfix.5 at /Users/filiph/dev/flutter
• Framework revision 27321ebbad (6 weeks ago), 2019-12-10 18:15:01 -0800
• Engine revision 2994f7e1e6
• Dart version 2.7.0

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /Users/filiph/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling
support)
• Platform android-28, build-tools 28.0.3
• Java binary at: /Applications/Android
Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build
1.8.0_202-release-1483-b49-5587405)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.0)
• Xcode at /Applications/Xcode_11.app/Contents/Developer
• Xcode 11.0, Build version 11A420a
• CocoaPods version 1.7.5

[✓] Android Studio (version 3.5)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 40.2.2
• Dart plugin version 191.8593
• Java version OpenJDK Runtime Environment (build
1.8.0_202-release-1483-b49-5587405)

[✓] VS Code (version 1.41.1)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.7.1

[✓] Connected device (1 available)
• Pixel 2 XL • 711KPZK0592485 • android-arm64 • Android 10 (API 29)

• No issues found!
```

Reproduce the report with the linked sloth_app commit in Android Studio, enable “Show widget rebuild information,” and navigate to the fourth screen. Then trace how the IntelliJ plugin handles the Flutter.RebuiltWidgets extension event; done means the console exception is resolved and the widget rebuild panel continues updating.

Written by the indexing model from the issue text.