futures-preview-0.3.0-alpha.13 build fails on nightly-2019-04-08 or later

[taiki-e]

Probably it will take a while to release the next version.

It can be avoided by pinning the nightly toolchain to the 2019-04-07 or early.

[Nemo157]

Now that #1514 has been merged master once again works on the latest nightly (for now...). If you want to prepare for the new release (or have other reasons you can't stay on nightly-2019-04-07 or earlier) you can override the crate in your Cargo.toml:

[patch.crates-io]
futures-preview = { git = "https://github.com/rust-lang-nursery/futures-rs" }
futures-core-preview = { git = "https://github.com/rust-lang-nursery/futures-rs" }
futures-util-preview = { git = "https://github.com/rust-lang-nursery/futures-rs" }
futures-sink-preview = { git = "https://github.com/rust-lang-nursery/futures-rs" }
futures-channel-preview = { git = "https://github.com/rust-lang-nursery/futures-rs" }
futures-executor-preview = { git = "https://github.com/rust-lang-nursery/futures-rs" }
futures-io-preview = { git = "https://github.com/rust-lang-nursery/futures-rs" }
futures-test-preview = { git = "https://github.com/rust-lang-nursery/futures-rs" }

this will apply throughout your dependency tree, so will likely fail if you have dependencies that directly implement the Future trait unless they also prepare for the next version, but ¯\_(ツ)_/¯ such is life on nightly (and thank you to everyone that is willing to help test this stuff while it's on nightly).

[vorot93]

@cramertj This can be closed now, I believe?