`ManagedAtomicLazyReference` leaks memory

[nkbelov]

ManagedAtomicLazyReference leaks its contents.

Information

• Package version: .upToNextMajor(from: "1.0.0")
• Platform version: macOS 12.6
• Swift version: 1.62.8 Apple Swift version 5.7 (swiftlang-5.7.0.127.4 clang-1400.0.29.50)

Checklist

• [x] If possible, I've reproduced the issue using the main branch of this package.
• [x] I've searched for existing reports of the same issue.

Steps to Reproduce

final class Box<T: Sendable> {
    let value: T

    init(value: T) {
        self.value = value
    }

    deinit {
        print("BOX DEINIT")
    }
}

final class Item {

    private let test = ManagedAtomicLazyReference<Box<Int>>()

    init() {
        test.storeIfNilThenLoad(Box(value: 12345))
    }

    deinit {
        print("ITEM DEINIT")
    }
}

func test() {
    let _ = Item()
}

//`main.swift`:
test()

// prints "ITEM DEINIT" only

Expected behavior

"BOX DEINIT" and "ITEM DEINIT" get printed.

Actual behavior

Only "ITEM DEINIT" gets printed.

[lorentey]

Good catch! ManagedAtomicLazyReference fails to call dispose on its stored value.