When can JoinSet become stable?

[Cloud33]

JoinSet -> join_one It's too helpful for me. I can't wait to use it, but it's very troublesome to use it at present, so I want to know when it will be stable?

Strangely, I can compile it, but vs code displays error:
tokio = { version = "1.19.2", features = ["full"] }

[Darksonn]

Maybe in two or three releases.

Your VS code error is because VS code is not set up with --cfg tokio_unstable.

[Cloud33]

Maybe in two or three releases.

Great. I hope I can use it as soon as possible

Your VS code error is because VS code is not set up with . --cfg tokio_unstable

I am in a project Cargo.toml add

[build]
rustflags = ["--cfg", "tokio_unstable"]

But it didn't work. Was I wrong?

[Cloud33]

Well, I'm sure I'm wrong. I should be on this path .cargo/config.toml , thank you

[Darksonn]

Yeah, it doesn't go in Cargo.toml.