[Generic environment] Only substitute top-level archetypes. #8840
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The core substitution routine for the archetypes-to-interface types substitution was attempting to provide mappings for nested archetypes, when in fact these archetypes would (1) always be resolvable via their parent, and (2) could in fact cause infinite recursion, as with the new test case. Fixes SR-4617 / rdar://problem/31673819.
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@swift-ci please smoke test and merge |
swiftix
approved these changes
Apr 18, 2017
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The core substitution routine for the archetypes-to-interface types
substitution was attempting to provide mappings for nested archetypes,
when in fact these archetypes would (1) always be resolvable via their
parent, and (2) could in fact cause infinite recursion, as with the
new test case. Fixes SR-4617 / rdar://problem/31673819.