Tree closed on widget inspector test failure #128425
Description
Starting with a seemingly unrelated commit 6848110, this test started failing on the tree and on framework PRs (like this engine roll #128255).
Since it started failing early in the morning, I'll guess that it's due to today's random test order seed.
03:41 +4995 ~77: C:/b/s/w/ir/x/w/flutter/packages/flutter/test/widgets/widget_inspector_test.dart: ext.flutter.inspector.getParentChain
══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
The following TestFailure was thrown running a test:
Expected: <Instance of 'DiagnosticsNode'>
Actual: <null>
Which: is not an instance of 'DiagnosticsNode'
When the exception was thrown, this was the stack:
#4 _TestWidgetInspectorService.runTests.<anonymous closure> (file:///C:/b/s/w/ir/x/w/flutter/packages/flutter/test/widgets/widget_inspector_test.dart:2164:9)
<asynchronous suspension>
<asynchronous suspension>
(elided one frame from package:stack_trace)
This was caught by the test expectation on the following line:
file:///C:/b/s/w/ir/x/w/flutter/packages/flutter/test/widgets/widget_inspector_test.dart line 2164
The test description was:
ext.flutter.inspector.getParentChain
════════════════════════════════════════════════════════════════════════════════════════════════════
03:41 +4995 ~77 -1: C:/b/s/w/ir/x/w/flutter/packages/flutter/test/widgets/two_dimensional_viewport_test.dart: RenderTwoDimensionalViewport hitTestChildren (variant: TargetPlatform.android)
03:41 +4995 ~77 -1: C:/b/s/w/ir/x/w/flutter/packages/flutter/test/widgets/widget_inspector_test.dart: ext.flutter.inspector.getParentChain [E]
Test failed. See exception logs above.
The test description was: ext.flutter.inspector.getParentChain