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[GenericEnvironment] Don't apply outer context substitutions before type.subst in mapTypeIntoContext. #66589

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Merged
merged 1 commit into from
Jun 13, 2023

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@hborla hborla commented Jun 13, 2023

The outer context substitutions are already applied when invoking QueryInterfaceTypeSubstitutions. Applying the context substitutions before subst also causes problems because QueryInterfaceTypeSubstitutions will return a null type if given an archetype, which manifested with opened pack element environments.

Resolves #66502, #66125

type.subst in mapTypeIntoContext.

The outer context substitutions are already applied when invoking
QueryInterfaceTypeSubstitutions. Applying the context substitutions
before subst also causes problems because QueryInterfaceTypeSubstitutions
will return a null type if given an archetype, which manifested with
opened pack element environments.
@hborla hborla requested review from xedin and slavapestov as code owners June 13, 2023 06:11
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hborla commented Jun 13, 2023

@swift-ci please smoke test

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These changes should cover #66125 too, right?

@hborla hborla merged commit 76ee456 into swiftlang:main Jun 13, 2023
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hborla commented Jun 13, 2023

These changes should cover #66125 too, right?

Yes!

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"Ambiguous without more context" using parameter packs and key-paths
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