Bad state: No element for one of our users in one specific channel.

[jagged91]

Describe the bug
One of our users sees a grey block where the message list should be in one specific channel. All other channels work fine. It looks like an issue in message_list_view#957.

What package are you using? What version?
nullsafety.8

What platform is it about?

• Android
• iOS
• Web
• Windows
• MacOS
• Linux

**Logs **
flutter: ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
flutter: The following StateError was thrown building:
flutter: Bad state: No element
flutter:
flutter: When the exception was thrown, this was the stack:
flutter: #0 ListMixin.firstWhere (dart:collection/list.dart:167:5)
flutter: #1 _MessageListViewState.buildMessage
flutter: #2 _MessageListViewState._buildBottomMessage
flutter: #3 _MessageListViewState._buildListView..
flutter: #4 _PositionedListState._buildItem
flutter: #5 _PositionedListState._buildSeparatedListElement
flutter: #6 _PositionedListState.build.
flutter: #7 SliverChildBuilderDelegate.build
flutter: #8 SliverMultiBoxAdaptorElement._build
flutter: #9 SliverMultiBoxAdaptorElement.createChild.
flutter: #10 BuildOwner.buildScope
flutter: #11 SliverMultiBoxAdaptorElement.createChild
flutter: #12 RenderSliverMultiBoxAdaptor._createOrObtainChild.
flutter: #13 RenderObject.invokeLayoutCallback.
flutter: #14 PipelineOwner._enableMutationsToDirtySubtrees
flutter: #15 RenderObject.invokeLayoutCallback
flutter: #16 RenderSliverMultiBoxAdaptor._createOrObtainChild
flutter: #17 RenderSliverMultiBoxAdaptor.insertAndLayoutChild
flutter: #18 RenderSliverList.performLayout.advance
flutter: #19 RenderSliverList.performLayout
flutter: #20 RenderObject.layout
flutter: #21 RenderSliverEdgeInsetsPadding.performLayout
flutter: #22 RenderSliverPadding.performLayout
flutter: #23 RenderObject.layout
flutter: #24 RenderViewportBase.layoutChildSequence
flutter: #25 UnboundedRenderViewport._attemptLayout
flutter: #26 UnboundedRenderViewport.performLayout
flutter: #27 RenderObject.layout
flutter: #28 RenderProxyBoxMixin.performLayout
flutter: #29 RenderObject.layout
flutter: #30 RenderProxyBoxMixin.performLayout
flutter: #31 RenderObject.layout
flutter: #32 RenderProxyBoxMixin.performLayout
flutter: #33 RenderObject.layout
flutter: #34 RenderProxyBoxMixin.performLayout
flutter: #35 RenderObject.layout
flutter: #36 RenderProxyBoxMixin.performLayout
flutter: #37 RenderObject.layout
flutter: #38 RenderProxyBoxMixin.performLayout
flutter: #39 RenderObject.layout
flutter: #40 RenderProxyBoxMixin.performLayout
flutter: #41 RenderObject.layout
flutter: #42 ChildLayoutHelper.layoutChild
flutter: #43 RenderStack._computeSize
flutter: #44 RenderStack.performLayout
flutter: #45 RenderObject.layout
flutter: #46 RenderProxyBoxMixin.performLayout
flutter: #47 RenderObject.layout
flutter: #48 _RenderLayoutBuilder.performLayout
flutter: #49 RenderObject.layout
flutter: #50 RenderProxyBoxMixin.performLayout
flutter: #51 RenderLeaderLayer.performLayout
flutter: #52 RenderObject.layout
flutter: #53 ChildLayoutHelper.layoutChild
flutter: #54 RenderStack._computeSize
flutter: #55 RenderStack.performLayout
flutter: #56 RenderObject.layout
flutter: #57 ChildLayoutHelper.layoutChild
flutter: #58 RenderStack._computeSize
flutter: #59 RenderStack.performLayout
flutter: #60 RenderObject.layout
flutter: #61 ChildLayoutHelper.layoutChild
flutter: #62 RenderFlex._computeSizes
flutter: #63 RenderFlex.performLayout
flutter: #64 RenderObject.layout
flutter: #65 RenderProxyBoxMixin.performLayout
flutter: #66 RenderObject.layout
flutter: #67 MultiChildLayoutDelegate.layoutChild
flutter: #68 _ScaffoldLayout.performLayout
flutter: #69 MultiChildLayoutDelegate._callPerformLayout
flutter: #70 RenderCustomMultiChildLayoutBox.performLayout
flutter: #71 RenderObject.layout
flutter: #72 RenderProxyBoxMixin.performLayout
flutter: #73 RenderObject.layout
flutter: #74 RenderProxyBoxMixin.performLayout
flutter: #75 _RenderCustomClip.performLayout
flutter: #76 RenderObject.layout
flutter: #77 RenderProxyBoxMixin.performLayout
flutter: #78 RenderObject.layout
flutter: #79 RenderProxyBoxMixin.performLayout
flutter: #80 RenderObject._layoutWithoutResize
flutter: #81 PipelineOwner.flushLayout
flutter: #82 RendererBinding.drawFrame
flutter: #83 WidgetsBinding.drawFrame
flutter: #84 RendererBinding._handlePersistentFrameCallback
flutter: #85 SchedulerBinding._invokeFrameCallback
flutter: #86 SchedulerBinding.handleDrawFrame
flutter: #87 SchedulerBinding._handleDrawFrame
flutter: #91 _invoke (dart:ui/hooks.dart:163:10)
flutter: #92 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:259:5)
flutter: #93 _drawFrame (dart:ui/hooks.dart:126:31)
flutter: (elided 3 frames from dart:async)
flutter: ════════════════════════════════════════════════════════════════════════════════════════════════════
flutter: ----------------FIREBASE CRASHLYTICS----------------
flutter: Bad state: No element
flutter:
#0 ListMixin.firstWhere (dart:collection/list.dart:167:5)
#1 _MessageListViewState.buildMessage
#2 _MessageListViewState._buildBottomMessage
#3 _MessageListViewState._buildListView..
#4 _PositionedListState._buildItem
#5 _PositionedListState._buildSeparatedListElement
#6 _PositionedListState.build.
#7 SliverChildBuilderDelegate.build
#8 SliverMultiBoxAdaptorElement._build
#9 SliverMultiBoxAd<…>

[deven98]

Taking a look into this,

I'll get back to you when I have more information.

Thanks!

[jagged91]

@deven98 it was a bug on our end, the user wasn't in the channel like they should have been.