======== Exception caught by scheduler library =====================================================
The following assertion was thrown during a scheduler callback:
Updated layout information required for RenderIndexedSemantics#55c1c NEEDS-LAYOUT to calculate semantics.
'package:flutter/src/rendering/object.dart':
Failed assertion: line 2658 pos 12: '!_needsLayout'


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      RenderObject._getSemanticsForParent (package:flutter/src/rendering/object.dart:2658:12)
#3      RenderObject._getSemanticsForParent.<anonymous closure> (package:flutter/src/rendering/object.dart:2680:61)
#4      Iterable.forEach (dart:core/iterable.dart:257:30)
#5      RenderSliverVariableSizeBoxAdaptor.visitChildren (package:flutter_staggered_grid_view/src/rendering/sliver_variable_size_box_adaptor.dart:294:29)
#6      RenderObject.visitChildrenForSemantics (package:flutter/src/rendering/object.dart:2765:5)
...
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