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I/flutter ( 7305): 'package:flutter/src/widgets/framework.dart': Failed assertion: line 1346 pos 12:
I/flutter ( 7305): '!children.any((Widget child) => child == null)': is not true.
I/flutter ( 7305):
I/flutter ( 7305): Either the assertion indicates an error in the framework itself, or we should provide substantially
I/flutter ( 7305): more information in this error message to help you determine and fix the underlying cause.
I/flutter ( 7305): In either case, please report this assertion by filing a bug on GitHub:
I/flutter ( 7305): https://github.com/flutter/flutter/issues/new
I/flutter ( 7305):
I/flutter ( 7305): When the exception was thrown, this was the stack:
I/flutter ( 7305): #2 MultiChildRenderObjectWidget.MultiChildRenderObjectWidget (package:flutter/src/widgets/framework.dart:1346:12)