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[NFC] CHANGELOG: Log new existential any diagnostic behavior #79653

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Feb 28, 2025
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[NFC] CHANGELOG: Log new existential any diagnostic behavior #79653

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9 changes: 9 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -5,6 +5,14 @@

## Swift 6.1

* [#78389][]:
Errors pertaining to the enforcement of [`any` syntax][SE-0335] on boxed
protocol types (aka existential types), including those produced by enabling
the upcoming feature `ExistentialAny`, are downgraded to warnings until a
future language mode.

These warnings can be escalated back to errors with `-Werror ExistentialAny`.

* Previous versions of Swift would incorrectly allow Objective-C `-init...`
methods with custom Swift names to be imported as initializers, but with base
names other than `init`. The compiler now diagnoses these attributes and
Expand Down Expand Up @@ -10719,4 +10727,5 @@ using the `.dynamicType` member to retrieve the type of an expression should mig
[#56139]: <https://github.com/apple/swift/issues/56139>
[#70065]: <https://github.com/apple/swift/pull/70065>
[#71075]: <https://github.com/apple/swift/pull/71075>
[#78389]: <https://github.com/swiftlang/swift/pull/78389>
[swift-syntax]: https://github.com/apple/swift-syntax