Tokio-tls compile error

[Drevoed]

Version

cargo tree | grep tokio                                                                   ░▒▓ at 13:18:40 
│   │   ├── tokio-codec v0.2.0-alpha.4
│   │   │   └── tokio-io v0.2.0-alpha.4
│   │   ├── tokio-io v0.2.0-alpha.4 (*)
│   │   └── tokio-sync v0.2.0-alpha.4
│   ├── tokio v0.2.0-alpha.4
│   │   ├── tokio-codec v0.2.0-alpha.4 (*)
│   │   ├── tokio-executor v0.2.0-alpha.4
│   │   │   ├── tokio-sync v0.2.0-alpha.4 (*)
│   │   ├── tokio-fs v0.2.0-alpha.4
│   │   │   ├── tokio-executor v0.2.0-alpha.4 (*)
│   │   │   ├── tokio-io v0.2.0-alpha.4 (*)
│   │   │   └── tokio-sync v0.2.0-alpha.4 (*)
│   │   ├── tokio-io v0.2.0-alpha.4 (*)
│   │   ├── tokio-macros v0.2.0-alpha.4
│   │   ├── tokio-net v0.2.0-alpha.4
│   │   │   ├── tokio-codec v0.2.0-alpha.4 (*)
│   │   │   ├── tokio-executor v0.2.0-alpha.4 (*)
│   │   │   ├── tokio-io v0.2.0-alpha.4 (*)
│   │   │   ├── tokio-sync v0.2.0-alpha.4 (*)
│   │   ├── tokio-sync v0.2.0-alpha.4 (*)
│   │   ├── tokio-timer v0.3.0-alpha.4
│   │   │   ├── tokio-executor v0.2.0-alpha.4 (*)
│   │   │   └── tokio-sync v0.2.0-alpha.4 (*)
│   ├── tokio-executor v0.2.0-alpha.4 (*)
│   ├── tokio-io v0.2.0-alpha.4 (*)
│   ├── tokio-net v0.2.0-alpha.4 (*)
│   ├── tokio-sync v0.2.0-alpha.4 (*)
│   ├── tokio-timer v0.3.0-alpha.4 (*)
│   │   ├── tokio-io v0.2.0-alpha.4 (*)
│   └── tokio v0.2.0-alpha.4 (*)
│   ├── tokio-io v0.2.0-alpha.4 (*)
│   └── tokio-tls v0.3.0-alpha.4
│       └── tokio-io v0.2.0-alpha.4 (*)
└── tokio v0.2.0-alpha.4 (*)

Platform

Linux arkrait 5.2.11-arch1-1-ARCH #1 SMP PREEMPT Thu Aug 29 08:09:36 UTC 2019 x86_64 GNU/Linux

Subcrates

tokio-tls

Description

When trying to compile tokio-tls with latest nightly (2019-09-10) compiler fails with

error[E0597]: `self` does not live long enough
   --> /home/miron/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-tls-0.3.0-alpha.4/src/lib.rs:305:23
    |
305 |         handshake(|s| self.0.accept(s), stream).await
    |         --------------^^^^---------------------
    |         |         |   |
    |         |         |   borrowed value does not live long enough
    |         |         value captured here
    |         a temporary with access to the borrow is created here ...
306 |     }
    |     -
    |     |
    |     `self` dropped here while still borrowed
    |     ... and the borrow might be used here, when that temporary is dropped and runs the destructor for type `impl std::future::Future`
    |
    = note: The temporary is part of an expression at the end of a block. Consider forcing this temporary to be dropped sooner, before the block's local variables are dropped. For example, you could save the expression's value in a new local variable `x` and then make `x` be the expression at the end of the block.

[fakeshadow]

add move in closure and it compiles on my machine.

[Drevoed]

Indeed that will work, but I suppose developers would like to see that the library in current state won't compile :)

[WaffleLapkin]

Also, with the previous nightly (nightly-2019-09-10-x86_64-unknown-linux-gnu - rustc 1.39.0-nightly (0b36e9dea 2019-09-09)) tokio-tls compiles just fine.

[davidbarsky]

I think this compilation error might be related to rust-lang/rust#64292.