statusBarBrightness: Brightness.dark problem

[honzasvasek]

Since the last cleanup setting statusBarBrightness: Brightness.dark gives an error, and on return to the calling screen, the calling screen is not shown.

I/flutter (14249): ══╡ EXCEPTION CAUGHT BY SCHEDULER LIBRARY ╞═════════════════════════════════════════════════════════
I/flutter (14249): The following assertion was thrown during a scheduler callback:
I/flutter (14249): Failed assertion: boolean expression must not be null
I/flutter (14249):
I/flutter (14249): Either the assertion indicates an error in the framework itself, or we should provide substantially
I/flutter (14249): more information in this error message to help you determine and fix the underlying cause.
I/flutter (14249): In either case, please report this assertion by filing a bug on GitHub:
I/flutter (14249): https://github.com/flutter/flutter/issues/new?template=BUG.md
I/flutter (14249):
I/flutter (14249): When the exception was thrown, this was the stack:
I/flutter (14249): #0 RenderView.compositeFrame (package:flutter/src/rendering/view.dart:200:11)
I/flutter (14249): #1 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:332:16)
I/flutter (14249): #2 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:701:13)
I/flutter (14249): #3 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:268:5)
I/flutter (14249): #4 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:988:15)
I/flutter (14249): #5 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:928:9)
I/flutter (14249): #6 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:840:5)
I/flutter (14249): #10 _invoke (dart:ui/hooks.dart:209:10)
I/flutter (14249): #11 _drawFrame (dart:ui/hooks.dart:168:3)
I/flutter (14249): (elided 3 frames from package dart:async)
I/flutter (14249): ════════════════════════════════════════════════════════════════════════════════════════════════════
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