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══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
The following assertion was thrown building
RawGestureDetector-\[LabeledGlobalKey<RawGestureDetectorState>#.+\]\(state:
RawGestureDetectorState#.+\(gestures: <none>, behavior: opaque\)\):
'package:flutter\/src\/painting\/basic_types\.dart': Failed assertion: line 223 pos 10: 'textDirection
!= null': is not true\.

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=BUG\.md

User-created ancestor of the error-causing widget was:
  CustomScrollView
  file:\/\/\/.+print_user_created_ancestor_test\.dart:[0-9]+:7

When the exception was thrown, this was the stack:
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\(elided [0-9]+ frames from .+\)
════════════════════════════════════════════════════════════════════════════════════════════════════
.*..:.. \+0 -1: Rendering Error *
  Test failed\. See exception logs above\.
  The test description was: Rendering Error
 *
.*..:.. \+0 -1: Some tests failed\. *
