[Swift 6] No diagnostic when explicitly capturing a non-sendable value

[rraphaeldev]

Description

When explicitly capturing a non-sendable value in a Task closure, no diagnostic is raised.

Reproduction

class NonSendable {
    func action() async {}
}

@MainActor
final class Foo {
    let value = NonSendable()

    func perform() {
        Task { [value] in
            await value.action() // no error, but can cause data races
        }

        Task {
            await value.action() // error: sending 'self.value' risks causing data races
        }
    }
}

Expected behavior

A data race diagnostic should most likely be raised even when value is manually captured in the task closure.

Environment

swift-driver version: 1.115 Apple Swift version 6.0.2 (swiftlang-6.0.2.1.2 clang-1600.0.26.4)
Target: arm64-apple-macosx15.0

Additional information

Swift forums question: https://forums.swift.org/t/task-capture-list-silence-data-race-error/78275