return err
	}

	var partIDbin [4]byte
	binary.LittleEndian.PutUint32(partIDbin[:], uint32(partID)) // marshal part ID

	mac := hmac.New(sha256.New, objectEncryptionKey) // derive part encryption key from part ID and object key
	mac.Write(partIDbin[:])
	partEncryptionKey := mac.Sum(nil)

	// Limit the reader, so the decryptor doesn't receive bytes
	// from the next part (different DARE stream)

        if (!OperatingSystem.current().macOsX) {
            excludeTestsMatching "org.gradle.docs.samples.*.building-swift-*.sample"
        }
        // We don't maintain Java 7 on Windows and Mac
        if (OperatingSystem.current().windows || OperatingSystem.current().macOsX) {
            excludeTestsMatching "*java7CrossCompilation.sample"
        }

		go func() {
			defer wg.Done()
			Sleep(10 * Microsecond)
		}()
	}
	for range count {
		Sleep(1 * Microsecond)
	}

	// Give ourselves 60 seconds to complete.
	// This used to reliably fail on a Mac M3 laptop,
	// which needed 77 seconds.
	// Trybots are slower, so it will fail even more reliably there.
	// With the fix, the code runs in under a second.
	done := make(chan bool)