determine error incase of truth checking inside ternary operator

[jsuryahyd]

Erroneous Code :

isFavourite() {
    return wishListedUsers ? wishListedUsers.containsKey(id) : false;
}

So, the error was generated when I tried to check truthy of a Map (coming from javascript), inside a ternary operator.
Error says, that the it could not point out the exact stack and line of the error.(even though it does here.)
Ui breaks with red screen and overflowing.

I/flutter ( 6431): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
I/flutter ( 6431): The following assertion was thrown building ScopedModelDescendant<AppScopedModel>(dirty):
I/flutter ( 6431): type '_InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'bool'
I/flutter ( 6431): Either the assertion indicates an error in the framework itself, or we should provide substantially
I/flutter ( 6431): more information in this error message to help you determine and fix the underlying cause.
I/flutter ( 6431): In either case, please report this assertion by filing a bug on GitHub:
I/flutter ( 6431):   https://github.com/flutter/flutter/issues/new?template=BUG.md
I/flutter ( 6431): When the exception was thrown, this was the stack:
I/flutter ( 6431): #0      Product.isFavourite 
I/flutter ( 6431): #1      ProductsListItem._builderFunc.<anonymous closure> 
I/flutter ( 6431): #2      ScopedModelDescendant.build 
I/flutter ( 6431): #3      StatelessElement.build 
I/flutter ( 6431): #4      ComponentElement.performRebuild 
I/flutter ( 6431): #5      Element.rebuild 
I/flutter ( 6431): #6      ComponentElement._firstBuild 
I/flutter ( 6431): #7      ComponentElement.mount 
I/flutter ( 6431): #8      Element.inflateWidget 
I/flutter ( 6431): #9      Element.updateChild 
I/flutter ( 6431): #10     SingleChildRenderObjectElement.mount 
I/flutter ( 6431): #11     Element.inflateWidget 
I/flutter ( 6431): #12     MultiChildRenderObjectElement.mount 
I/flutter ( 6431): #13     Element.inflateWidget 
I/flutter ( 6431): #14     Element.updateChild 
I/flutter ( 6431): #15     SingleChildRenderObjectElement.mount 
I/flutter ( 6431): #16     Element.inflateWidget 
I/flutter ( 6431): #17     Element.updateChild 
I/flutter ( 6431): #18     ComponentElement.performRebuild 
I/flutter ( 6431): #19     Element.rebuild 
I/flutter ( 6431): #20     ComponentElement._firstBuild 
I/flutter ( 6431): #21     ComponentElement.mount 
I/flutter ( 6431): #22     Element.inflateWidget 
I/flutter ( 6431): #23     MultiChildRenderObjectElement.mount 
I/flutter ( 6431): #24     Element.inflateWidget 
I/flutter ( 6431): #25     Element.updateChild 
I/flutter ( 6431): #26     SingleChildRenderObjectElement.mount 
I/flutter ( 6431): #27     Element.inflateWidget 
I/flutter ( 6431): #28     Element.updateChild 
I/flutter ( 6431): #29     ComponentElement.performRebuild 
I/flutter ( 6431): #30     Element.rebuild 
I/flutter ( 6431): #31     ComponentElement._firstBuild 
I/flutter ( 6431): #32     ComponentElement.mount 
I/flutter ( 6431): #33     Element.inflateWidget 
I/flutter ( 6431): #34     Element.updateChild 
I/flutter ( 6431): #35     ComponentElement.performRebuild 
I/flutter ( 6431): #36     Element.rebuild 
I/flutter ( 6431): #37     ComponentElement._firstBuild 
I/flutter ( 6431): #38     StatefulElement._firstBuild 
I/flutter ( 6431): #39     ComponentElement.mount 
I/flutter ( 6431): #40     Element.inflateWidget 
I/flutter ( 6431): #41     Element.updateChild 
I/flutter ( 6431): #42     SingleChildRenderObjectElement.mount 
I/flutter ( 6431): #43     Element.inflateWidget 
I/flutter ( 6431): #44     Element.updateChild 
I/flutter ( 6431): #45     ComponentElement.performRebuild 
I/flutter ( 6431): #46     Element.rebuild 
I/flutter ( 6431): #47     ComponentElement._firstBuild 
I/flutter ( 6431): #48     ComponentElement.mount 
I/flutter ( 6431): #49     Element.inflateWidget 
I/flutter ( 6431): #50     Element.updateChild 
I/flutter ( 6431): #51     SingleChildRenderObjectElement.mount 
I/flutter ( 6431): #52     Element.inflateWidget 
I/flutter ( 6431): #53     Element.updateChild 
I/flutter ( 6431): #54     ComponentElement.performRebuild 
I/flutter ( 6431): #55     Element.rebuild 
I/flutter ( 6431): #56     ComponentElement._firstBuild 
I/flutter ( 6431): #57     ComponentElement.mount 
I/flutter ( 6431): #58     Element.inflateWidget 
I/flutter ( 6431): #59     Element.updateChild 
I/flutter ( 6431): #60     SingleChildRenderObjectElement.mount 
I/flutter ( 6431): #61     Element.inflateWidget 
I/flutter ( 6431): #62     Element.updateChild 
I/flutter ( 6431): #63     ComponentElement.performRebuild 
I/flutter ( 6431): #64     Element.rebuild 
I/flutter ( 6431): #65     ComponentElement._firstBuild 
I/flutter ( 6431): #66     StatefulElement._firstBuild 
I/flutter ( 6431): #67     ComponentElement.mount 
I/flutter ( 6431): #68     Element.inflateWidget 
I/flutter ( 6431): #69     Element.updateChild 
I/flutter ( 6431): #70     ComponentElement.performRebuild 
I/flutter ( 6431): #71     Element.rebuild 
I/flutter ( 6431): #72     ComponentElement._firstBuild 
I/flutter ( 6431): #73     StatefulElement._firstBuild 
I/flutter ( 6431): #74     ComponentElement.mount 
I/flutter ( 6431): #75     Element.inflateWidget 
I/flutter ( 6431): #76     Element.updateChild 
I/flutter ( 6431): #77     SingleChildRenderObjectElement.mount 
I/flutter ( 6431): #78     Element.inflateWidget 
I/flutter ( 6431): #79     Element.updateChild 
I/flutter ( 6431): #80     ComponentElement.performRebuild 
I/flutter ( 6431): #81     Element.rebuild 
I/flutter ( 6431): #82     ComponentElement._firstBuild 
I/flutter ( 6431): #83     ComponentElement.mount 
I/flutter ( 6431): #84     Element.inflateWidget 
I/flutter ( 6431): #85     Element.updateChild 
I/flutter ( 6431): #86     SingleChildRenderObjectElement.mount 
I/flutter ( 6431): #87     Element.inflateWidget 
I/flutter ( 6431): #88     Element.updateChild 
I/flutter ( 6431): #89     ComponentElement.performRebuild 
I/flutter ( 6431): #90     Element.rebuild 
I/flutter ( 6431): #91     ComponentElement._firstBuild 
I/flutter ( 6431): #92     ComponentElement.mount 
I/flutter ( 6431): #93     Element.inflateWidget 
I/flutter ( 6431): #94     Element.updateChild 
I/flutter ( 6431): #95     SingleChildRenderObjectElement.mount 
I/flutter ( 6431): #96     Element.inflateWidget 
I/flutter ( 6431): #97     Element.updateChild 
I/flutter ( 6431): #98     SingleChildRenderObjectElement.mount 
I/flutter ( 6431): #99     Element.inflateWidget 
I/flutter ( 6431): #100    Element.updateChild 
I/flutter ( 6431): #101    ComponentElement.performRebuild 
I/flutter ( 6431): #102    Element.rebuild 
I/flutter ( 6431): #103    ComponentElement._firstBuild 
I/flutter ( 6431): #104    ComponentElement.mount 
I/flutter ( 6431): #105    Element.inflateWidget 
I/flutter ( 6431): #106    Element.updateChild 
I/flutter ( 6431): #107    ComponentElement.performRebuild 
I/flutter ( 6431): #108    Element.rebuild 
I/flutter ( 6431): #109    ComponentElement._firstBuild 
I/flutter ( 6431): #110    ComponentElement.mount 
I/flutter ( 6431): #111    ParentDataElement.mount 
I/flutter ( 6431): #112    Element.inflateWidget 
I/flutter ( 6431): #113    Element.updateChild 
I/flutter ( 6431): #114    ComponentElement.performRebuild 
I/flutter ( 6431): #115    Element.rebuild 
I/flutter ( 6431): #116    ComponentElement._firstBuild 
I/flutter ( 6431): #117    StatefulElement._firstBuild 
I/flutter ( 6431): #118    ComponentElement.mount 
I/flutter ( 6431): #119    Element.inflateWidget 
I/flutter ( 6431): #120    Element.updateChild 
I/flutter ( 6431): #121    SliverMultiBoxAdaptorElement.updateChild 
I/flutter ( 6431): #122    SliverMultiBoxAdaptorElement.createChild.<anonymous closure> 
I/flutter ( 6431): #123    BuildOwner.buildScope 
I/flutter ( 6431): #124    SliverMultiBoxAdaptorElement.createChild 
I/flutter ( 6431): #125    RenderSliverMultiBoxAdaptor._createOrObtainChild.<anonymous closure> 
I/flutter ( 6431): #126    RenderObject.invokeLayoutCallback.<anonymous closure> 
I/flutter ( 6431): #127    PipelineOwner._enableMutationsToDirtySubtrees 
I/flutter ( 6431): #128    RenderObject.invokeLayoutCallback 
I/flutter ( 6431): #129    RenderSliverMultiBoxAdaptor._createOrObtainChild 
I/flutter ( 6431): #130    RenderSliverMultiBoxAdaptor.addInitialChild 
I/flutter ( 6431): #131    RenderSliverList.performLayout 
I/flutter ( 6431): #132    RenderObject.layout 
I/flutter ( 6431): #133    RenderSliverPadding.performLayout 
I/flutter ( 6431): #134    RenderObject.layout 
I/flutter ( 6431): #135    RenderViewportBase.layoutChildSequence 
I/flutter ( 6431): #136    RenderViewport._attemptLayout 
I/flutter ( 6431): #137    RenderViewport.performLayout 
I/flutter ( 6431): #138    RenderObject.layout 
I/flutter ( 6431): #139    _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
I/flutter ( 6431): #140    RenderObject.layout 
I/flutter ( 6431): #141    _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
I/flutter ( 6431): #142    RenderObject.layout 
I/flutter ( 6431): #143    _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
I/flutter ( 6431): #144    RenderObject.layout 
I/flutter ( 6431): #145    _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
I/flutter ( 6431): #146    RenderObject.layout 
I/flutter ( 6431): #147    _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
I/flutter ( 6431): #148    RenderObject.layout 
I/flutter ( 6431): #149    _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
I/flutter ( 6431): #150    RenderObject.layout 
I/flutter ( 6431): #151    _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
I/flutter ( 6431): #152    RenderObject.layout 
I/flutter ( 6431): #153    _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
I/flutter ( 6431): #154    RenderObject.layout 
I/flutter ( 6431): #155    RenderPadding.performLayout 
I/flutter ( 6431): #156    RenderObject.layout 
I/flutter ( 6431): #157    MultiChildLayoutDelegate.layoutChild 
I/flutter ( 6431): #158    _ScaffoldLayout.performLayout 
I/flutter ( 6431): #159    MultiChildLayoutDelegate._callPerformLayout 
I/flutter ( 6431): #160    RenderCustomMultiChildLayoutBox.performLayout 
I/flutter ( 6431): #161    RenderObject._layoutWithoutResize 
I/flutter ( 6431): #162    PipelineOwner.flushLayout 
I/flutter ( 6431): #163    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding.drawFrame 
I/flutter ( 6431): #164    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding.drawFrame 
I/flutter ( 6431): #165    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding._handlePersistentFrameCallback 
I/flutter ( 6431): #166    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback 
I/flutter ( 6431): #167    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleDrawFrame 
I/flutter ( 6431): #168    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._handleDrawFrame 
I/flutter ( 6431): #169    _invoke (dart:ui/hooks.dart:154:13)
I/flutter ( 6431): #170    _drawFrame (dart:ui/hooks.dart:143:3)
I/flutter ( 6431): ════════════════════════════════════════════════════════════════════════════════════════════════════
I/flutter ( 6431): Another exception was thrown: A RenderFlex overflowed by 99770 pixels on the right.```

[zoechi]

It's not clear what you try to accomplish.

Perhaps

isFavourite() {
    return wishListedUsers != null ? wishListedUsers.containsKey(id) : false;
}

Please consider asking support questions in one of the other channels listed at http://flutter.io/support .

[github-actions]

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.