OS: android - RQ3A.210905.001
Null check operator used on a null value
#0      _RenderRangeSlider.assembleSemanticsNode (package:flutter/src/material/range_slider.dart:1575)
#1      _SwitchableSemanticsFragment.compileChildren (package:flutter/src/rendering/object.dart:3822)
#2      _SwitchableSemanticsFragment.compileChildren (package:flutter/src/rendering/object.dart:3814)
#3      _SwitchableSemanticsFragment.compileChildren (package:flutter/src/rendering/object.dart:3814)
#4      _SwitchableSemanticsFragment.compileChildren (package:flutter/src/rendering/object.dart:3768)
#5      _SwitchableSemanticsFragment.compileChildren (package:flutter/src/rendering/object.dart:3768)
#6      _SwitchableSemanticsFragment.compileChildren (package:flutter/src/rendering/object.dart:3768)
#7      _SwitchableSemanticsFragment.compileChildren (package:flutter/src/rendering/object.dart:3814)
#8      _RootSemanticsFragment.compileChildren (package:flutter/src/rendering/object.dart:3692)
#9      RenderObject._updateSemantics (package:flutter/src/rendering/object.dart:2731)
#10     PipelineOwner.flushSemantics (package:flutter/src/rendering/object.dart:1080)
#11     RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:458)
#12     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:883)
#13     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:319)
#14     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1143)
#15     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1080)
#16     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:996)
#17     _rootRun (dart:async/zone.dart:1428)
#18     _CustomZone.run (dart:async/zone.dart:1328)
#19     _CustomZone.runGuarded (dart:async/zone.dart:1236)
#20     _invoke (dart:ui/hooks.dart:166)
#21     PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:270)
#22     _drawFrame (dart:ui/hooks.dart:129)

% flutter analyze
Analyzing app...                                     
No issues found! (ran in 3.5s)

% flutter doctor -v
[✓] Flutter (Channel stable, 2.5.1, on macOS 11.3.1 20E241 darwin-x64, locale en-CA)
    • Flutter version 2.5.1 at /Users/user/development/flutter_stable
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ffb2ecea52 (13 days ago), 2021-09-17 15:26:33 -0400
    • Engine revision b3af521a05
    • Dart version 2.14.2

[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at /Users/user/Library/Android/sdk
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/macos#android-setup for more details.

[✓] Xcode - develop for iOS and macOS
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.5.1, Build version 12E507
    • CocoaPods version 1.10.1

[✓] 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)

[!] Android Studio
    • Android Studio at /Users/user/Downloads/Android Studio Preview.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
    ✗ Unable to find bundled Java version.
    • Try updating or re-installing Android Studio.

[✓] IntelliJ IDEA Community Edition (version 2021.1)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    • 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

[✓] VS Code (version 1.60.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.26.0

[✓] Connected device (2 available)
    • iPhone 12 (mobile) • 73C2DF31-CA40-4FF0-9532-389A33FFE62E • ios            • com.apple.CoreSimulator.SimRuntime.iOS-14-5 (simulator)
    • Chrome (web)       • chrome                               • web-javascript • Google Chrome 94.0.4606.61