cancelOnGracefulShutdown never returns

[sliemeobn]

In version 2.0.0-alpha.1

swift-driver version: 1.75.2 Apple Swift version 5.8 (swiftlang-5.8.0.124.2 clang-1403.0.22.11.100)
Target: arm64-apple-macosx13.0

Calling cancelOnGracefulShutdown currently never finishes, because the withThrowingTaskGroup keeps running the "waiting-for-graceful-shutdown" task.

Afaik this is due to some unfortunate inconsistency with task groups with their "cancelAll on return" behavior.
edit: this has nothing to do with environment or inconsistencies, was just a plain bug.

This test will never finish in my environment:

    func testResumesCancelOnGracefulShutdownWithResult() async throws {
        await testGracefulShutdown { _ in
            let result = await cancelOnGracefulShutdown {
                await Task.yield()
                return "hello"
            }

            XCTAssertEqual(result, "hello")
        }
    }

Adding a "manual" group.cancelAll() should do the trick.