UnnecessaryInnerClass: add test for safe qualified expressions #4864
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Add a unit test for a bug in which safe qualified references to a nullable field
in the parent class (i.e. as
?.
) would not be marked as warnings in release1.20.0. This issue has been inadvertently fixed by
#4738, but adding a unit test will guard
against future regressions.
I was able to confirm this test fails by checking out the 1.20.0 tag and running
the unit test; against that tag the fix was to override the
visitSafeQualifiedExpression() function with the same logic as
visitCallExpression().