Replace subtype check in derivedness check with flags and structure checks#27403
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weswigham merged 3 commits intoOct 4, 2018
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RyanCavanaugh
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Oct 1, 2018
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This way even if a given class or object overrides a method on
ObjectorFunctionin a structurally incompatible way, they still get measured as instances of those bases forinstanceof.Fixes #26159