`@usableFromInline internal` type doesn't get `Sendable` conformance synthesised

[dnadoba]

@usableFromInline
struct Foo {
    var integer: Int
}

struct Bar: Sendable {
    var foo: Foo // warning: Stored property 'foo' of 'Sendable'-conforming struct 'Bar' has non-sendable type 'Foo'
}

This warning only makes sense if the compiled with library evolution mode but this warning is also emitted if compiled without library evolution mode.
If @usableFromInline is removed from Foo the Sendable conformance is synthesised as expected.

Environment

• Swift compiler version info: swift-driver version: 1.87.3 Apple Swift version 5.9.2 (swiftlang-5.9.2.2.51 clang-1500.1.0.2.2)

[dnadoba]

rdar://118770461