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controller.lastElapsedDuration is null in ScrollableState.didUpdateScrollBehavior #3231

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jason-simmons opened this issue Apr 8, 2016 · 4 comments
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controller.lastElapsedDuration is null in ScrollableState.didUpdateScrollBehavior #3231

jason-simmons opened this issue Apr 8, 2016 · 4 comments
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@abarth

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jason-simmons commented Apr 8, 2016 •
edited by abarth
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I don't have a reliable reproduction of this. But while scrolling the main list in Stocks I occasionally see this NPE:

I/flutter (16268): ══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════════════════════════
I/flutter (16268): The following exception was raised during performLayout():
I/flutter (16268): The null object does not have a getter 'inMicroseconds'.
I/flutter (16268): NoSuchMethodError: method not found: 'inMicroseconds'
I/flutter (16268): Receiver: null
I/flutter (16268): Arguments: []
I/flutter (16268): The following RenderObject was being processed when the exception was fired:
I/flutter (16268): RenderList NEEDS-LAYOUT
I/flutter (16268): This RenderObject had the following creator:
I/flutter (16268):   ListViewport ← Listener ← _GestureSemantics ← RawGestureDetector-[GlobalKey 201783932] ← ScrollableList-['stock-list']
I/flutter (16268):   ← StockList ← Container-['StockHomeTab.market'] ← KeyedSubtree-['['StockHomeTab.market']'] ←
I/flutter (16268):   RepaintBoundary-['['['StockHomeTab.market']']'] ← PageViewport ← ⋯
I/flutter (16268): This RenderObject had the following descendants (showing up to depth 5):
I/flutter (16268):   RenderRepaintBoundary
I/flutter (16268):     RenderSemanticsGestureHandler
I/flutter (16268):       RenderPointerListener
I/flutter (16268):         RenderDecoratedBox
I/flutter (16268):           RenderPadding
I/flutter (16268):   RenderRepaintBoundary
I/flutter (16268):     RenderSemanticsGestureHandler
I/flutter (16268):       RenderPointerListener
I/flutter (16268):         RenderDecoratedBox
I/flutter (16268):           RenderPadding
I/flutter (16268):   RenderRepaintBoundary
I/flutter (16268):     RenderSemanticsGestureHandler
I/flutter (16268):       RenderPointerListener
I/flutter (16268):         RenderDecoratedBox
I/flutter (16268):           RenderPadding
I/flutter (16268):   RenderRepaintBoundary
I/flutter (16268):     RenderSemanticsGestureHandler
I/flutter (16268):       RenderPointerListener
I/flutter (16268):         RenderDecoratedBox
I/flutter (16268):           RenderPadding
I/flutter (16268):   RenderRepaintBoundary
I/flutter (16268):     RenderSemanticsGestureHandler
I/flutter (16268):       RenderPointerListener
I/flutter (16268):         RenderDecoratedBox
I/flutter (16268):           RenderPadding
I/flutter (16268):   RenderRepaintBoundary
I/flutter (16268):     RenderSemanticsGestureHandler
I/flutter (16268):       RenderPointerListener
I/flutter (16268):         RenderDecoratedBox
I/flutter (16268):           RenderPadding
I/flutter (16268):   ...(descendants list truncated after 30 lines)
I/flutter (16268): Stack trace:
I/flutter (16268): #0      Object._noSuchMethod (dart:core-patch/object_patch.dart:42)
I/flutter (16268): #1      Object.noSuchMethod (dart:core-patch/object_patch.dart:45)
I/flutter (16268): #2      ScrollableState.didUpdateScrollBehavior (package:flutter/src/widgets/scrollable.dart:392)
I/flutter (16268): #3      _ScrollableListState._handleExtentsChanged.<anonymous closure> (package:flutter/src/widgets/scrollable_list.dart:60)
I/flutter (16268): #4      State.setState (package:flutter/src/widgets/framework.dart:415)
I/flutter (16268): #5      _ScrollableListState._handleExtentsChanged (package:flutter/src/widgets/scrollable_list.dart:59)
I/flutter (16268): #6      _VirtualListViewportElement.layout (package:flutter/src/widgets/scrollable_list.dart:258)
I/flutter (16268): #7      RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:1275)
I/flutter (16268): #8      RenderList.performLayout (package:flutter/src/rendering/list.dart:138)
I/flutter (16268): #9      RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:1100)
I/flutter (16268): #10     PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:703)
I/flutter (16268): #11     BindingBase&Scheduler&Gesturer&Services&Renderer.beginFrame (package:flutter/src/rendering/binding.dart:88)
I/flutter (16268): #12     WidgetFlutterBinding.beginFrame (package:flutter/src/widgets/binding.dart:103)
I/flutter (16268): #13     BindingBase&Scheduler&Gesturer&Services&Renderer._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:82)
I/flutter (16268): #14     BindingBase&Scheduler.invokeFrameCallback (package:flutter/src/scheduler/scheduler.dart:270)
I/flutter (16268): #15     BindingBase&Scheduler.handleBeginFrame (package:flutter/src/scheduler/scheduler.dart:247)
I/flutter (16268): #16     _beginFrame (file:///ssd2/sky/engine/src/out/android_Debug/gen/sky/bindings/hooks.dart:48)
I/flutter (16268): ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
@jason-simmons
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@abarth

@abarth abarth self-assigned this Apr 8, 2016
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abarth commented Apr 8, 2016

I can take a look

@abarth abarth mentioned this issue Apr 20, 2016
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abarth commented Apr 20, 2016

Dupe of #3417

@abarth abarth closed this as completed Apr 20, 2016
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github-actions bot commented Sep 6, 2021

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

@github-actions github-actions bot locked as resolved and limited conversation to collaborators Sep 6, 2021
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