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PageView applyViewportDimension throws Null check operator used on a null value #101007

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#104405
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PageView applyViewportDimension throws Null check operator used on a null value#101007
#104405
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bleroux
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P2Important issues not at the top of the work lista: error messageError messages from the Flutter frameworka: null-safetySupport for Dart's null safety featurea: productionIssues experienced in live production appsa: releaseChallenges faced when attempting to productionize an appc: crashStack traces logged to the consolecp: reviewCherry-picks in the review queuef: scrollingViewports, list views, slivers, etc.found in release: 3.0Found to occur in 3.0found in release: 3.1Found to occur in 3.1frameworkflutter/packages/flutter repository. See also f: labels.has reproducible stepsThe issue has been confirmed reproducible and is ready to work onplatform-androidAndroid applications specifically
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Description

@stx
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opened on Mar 30, 2022

Found this very rare Crashlytics error in production on a Galaxy Note10+. I'm not sure of the trigger or a reproduction.

Looks like it's due to this:

flutter/packages/flutter/lib/src/widgets/page_view.dart

Line 455 in f07f6fe

page = _cachedPage!; 

Non-fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: Null check operator used on a null value. Error thrown Instance of 'ErrorDescription'.
       at _PagePosition.applyViewportDimension(page_view.dart:453)
       at RenderViewport.performLayout(viewport.dart:1456)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderCustomPaint.performLayout(custom_paint.dart:545)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at ChildLayoutHelper.layoutChild(layout_helper.dart:56)
       at RenderStack._computeSize(stack.dart:570)
       at RenderStack.performLayout(stack.dart:597)
       at RenderObject.layout(object.dart:1887)
       at _RenderLayoutBuilder.performLayout(layout_builder.dart:321)
       at RenderObject.layout(object.dart:1887)
       at MultiChildLayoutDelegate.layoutChild(custom_layout.dart:171)
       at _ScaffoldLayout.performLayout(scaffold.dart:1005)
       at MultiChildLayoutDelegate._callPerformLayout(custom_layout.dart:240)
       at RenderCustomMultiChildLayoutBox.performLayout(custom_layout.dart:403)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at _RenderCustomClip.performLayout(proxy_box.dart:1376)
       at RenderObject.layout(object.dart:1887)
       at ChildLayoutHelper.layoutChild(layout_helper.dart:56)
       at RenderStack._computeSize(stack.dart:570)
       at RenderStack.performLayout(stack.dart:597)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at ChildLayoutHelper.layoutChild(layout_helper.dart:56)
       at RenderStack._computeSize(stack.dart:570)
       at RenderStack.performLayout(stack.dart:597)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderOffstage.performLayout(proxy_box.dart:3430)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at _RenderTheatre.performLayout(overlay.dart:751)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at ChildLayoutHelper.layoutChild(layout_helper.dart:56)
       at RenderStack._computeSize(stack.dart:570)
       at RenderStack.performLayout(stack.dart:597)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderProxyBoxMixin.performLayout(proxy_box.dart:116)
       at RenderObject.layout(object.dart:1887)
       at RenderView.performLayout(view.dart:165)
       at RenderObject._layoutWithoutResize(object.dart:1731)
       at PipelineOwner.flushLayout(object.dart:887)
       at RendererBinding.drawFrame(binding.dart:497)
       at WidgetsBinding.drawFrame(binding.dart:883)
       at RendererBinding._handlePersistentFrameCallback(binding.dart:363)
       at SchedulerBinding._invokeFrameCallback(binding.dart:1144)
       at SchedulerBinding.handleDrawFrame(binding.dart:1081)
       at SchedulerBinding._handleDrawFrame(binding.dart:995)
Logs 

[✓] Flutter (Channel stable, 2.10.1, on macOS 12.3 21E230 darwin-arm, locale en-US)
    • Flutter version 2.10.1 at /Users/james/Development/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision db747aa133 (7 weeks ago), 2022-02-09 13:57:35 -0600
    • Engine revision ab46186b24
    • Dart version 2.16.1
    • DevTools version 2.9.2

[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    • Android SDK at /Users/james/Library/Android/sdk
    • Platform android-31, build-tools 31.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.11+0-b60-7772763)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 13.2.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • CocoaPods version 1.11.2

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

[✓] Android Studio (version 2021.1)
    • 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 11.0.11+0-b60-7772763)

[✓] VS Code (version 1.65.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.32.0

[✓] Connected device (2 available)
    • Apollo (mobile) • da060dc78ac99566c39cb688206b34cb424a5ee1 • ios            • iOS 15.3.1 19D52
    • Chrome (web)    • chrome                                   • web-javascript • Google Chrome 99.0.4844.84
    ! Error: Apollo is busy: Preparing the watch for development via Apollo. Xcode will continue when Apollo is finished. (code -10)

[✓] HTTP Host Availability
    • All required HTTP hosts are available

• No issues found!

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Labels

P2Important issues not at the top of the work lista: error messageError messages from the Flutter frameworka: null-safetySupport for Dart's null safety featurea: productionIssues experienced in live production appsa: releaseChallenges faced when attempting to productionize an appc: crashStack traces logged to the consolecp: reviewCherry-picks in the review queuef: scrollingViewports, list views, slivers, etc.found in release: 3.0Found to occur in 3.0found in release: 3.1Found to occur in 3.1frameworkflutter/packages/flutter repository. See also f: labels.has reproducible stepsThe issue has been confirmed reproducible and is ready to work onplatform-androidAndroid applications specifically

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