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Blocks appear as gray boxes #11

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howardabrams opened this issue Jun 10, 2020 · 2 comments
Open

Blocks appear as gray boxes #11

howardabrams opened this issue Jun 10, 2020 · 2 comments
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@howardabrams
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Just downloaded the app and started viewing the documentation, and noticed a few places where blocks are a large gray box, that send to go on forever. See to screenshots on my Android phone

Screenshot_20200610-130617

Screenshot_20200610-130721
@amake
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amake commented Jun 11, 2020

Thanks for the report. That's very strange; I can't reproduce it on my Pixel 2.

The big gray blocks seem to indicate an exception happening during layout. The only thing I can think of that would make it happen to you but not me is a difference in screen width, maybe?

Can you let me know your

  • your phone model (in particular so I can figure out your screen size)
  • your OS version
  • the app version

and I'll see what I can do.

@amake amake added the bug Something isn't working label Jun 11, 2020
@howardabrams
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howardabrams commented Jun 16, 2020 via email

amake added a commit that referenced this issue Oct 28, 2022
@amake
Fix internal Flutter error scrolling doc while width constrained
b93803a 
```
══╡ EXCEPTION CAUGHT BY SCHEDULER LIBRARY ╞═════════════════════════════════════════════════════════
The following assertion was thrown during a scheduler callback:
Layer OffsetEngineLayer was previously used as oldLayer.
Once a layer is used as oldLayer, it may not be used again. Instead, after calling one of the
SceneBuilder.push* methods and passing an oldLayer to it, use the layer returned by the method as
oldLayer in subsequent frames.
'dart:ui/compositing.dart':
Failed assertion: line 110 pos 9: '<optimized out>'

Either the assertion indicates an error in the framework itself, or we should provide substantially
more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
  https://github.com/flutter/flutter/issues/new?template=2_bug.md

When the exception was thrown, this was the stack:
#2      _EngineLayerWrapper._debugCheckNotUsedAsOldLayer (dart:ui/compositing.dart:110:9)
#3      SceneBuilder.addRetained.<anonymous closure>.recursivelyCheckChildrenUsedOnce (dart:ui/compositing.dart:695:21)
#4      List.forEach (dart:core-patch/growable_array.dart:416:8)
#5      SceneBuilder.addRetained.<anonymous closure>.recursivelyCheckChildrenUsedOnce (dart:ui/compositing.dart:701:18)
#6      SceneBuilder.addRetained.<anonymous closure> (dart:ui/compositing.dart:704:7)
#7      SceneBuilder.addRetained (dart:ui/compositing.dart:707:6)
#8      Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:671:15)
#9      ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#10     OffsetLayer.addToScene (package:flutter/src/rendering/layer.dart:1421:5)
#11     Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:674:5)
#12     ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#13     ClipRectLayer.addToScene (package:flutter/src/rendering/layer.dart:1590:5)
#14     Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:674:5)
#15     ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#16     OffsetLayer.addToScene (package:flutter/src/rendering/layer.dart:1421:5)
#17     Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:674:5)
#18     ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#19     OffsetLayer.addToScene (package:flutter/src/rendering/layer.dart:1421:5)
#20     Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:674:5)
#21     ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#22     OffsetLayer.addToScene (package:flutter/src/rendering/layer.dart:1421:5)
#23     Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:674:5)
#24     ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#25     TransformLayer.addToScene (package:flutter/src/rendering/layer.dart:1914:5)
#26     ContainerLayer.buildScene (package:flutter/src/rendering/layer.dart:1097:5)
#27     RenderView.compositeFrame (package:flutter/src/rendering/view.dart:231:37)
#28     RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:514:18)
#29     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:869:13)
#30     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:375:5)
#31     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1271:15)
#32     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1200:9)
#33     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1058:5)
#34     _invoke (dart:ui/hooks.dart:145:13)
#35     PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:338:5)
#36     _drawFrame (dart:ui/hooks.dart:112:31)
(elided 2 frames from class _AssertionError)
════════════════════════════════════════════════════════════════════════════════════════════════════
```
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@howardabrams @amake