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AST: GenericEnvironment::getOrCreateArchetypeFromInterfaceType() needs to handle case where parent of concrete anchor is concrete #39965

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slavapestov
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This still doesn't handle the case where a non-concrete anchor has a
concrete parent; that requires switching the archetype representation
to be "flat".

Fixes rdar://problem/84734584.

…s to handle case where parent of concrete anchor is concrete

This still doesn't handle the case where a non-concrete anchor has a
concrete parent; that requires switching the archetype representation
to be "flat".

Fixes <rdar://problem/84734584>.
@slavapestov slavapestov force-pushed the parent-of-concrete-is-concrete branch from a2ee2ab to 215fbf1 Compare October 29, 2021 00:08
@slavapestov
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@swift-ci Please smoke test

@slavapestov
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@swift-ci Please test source compatibility

@slavapestov slavapestov merged commit 646397a into swiftlang:main Oct 29, 2021
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