Cargo cannot install crate?

[akshaynanavati]

I have futures = "0.2.1" in my cargo.toml, yet I get the following when I try to build:

Updating registry `https://github.com/rust-lang/crates.io-index`
error: no matching version `^0.2` found for package `futures`
location searched: registry `https://github.com/rust-lang/crates.io-index`
versions found: 0.1.21, 0.1.20, 0.1.18, ...

Cargo version:

$ cargo --version
cargo 1.28.0-nightly (e2348c2db 2018-06-07)

Any help would be appreciated.

[MajorBreakfast]

Version 0.2 has been yanked from the fututres crate. It has been republished as the futures-preview crate.

#1039

I am sure that this will be communicated widely soon. This issue should best be kept open until that happened so that other people can easily find it.

[akshaynanavati]

Thanks. Is there a more recent version of futures in the nightly build, should I instead use futures 0.1.x, or should I use futures-preview? I'd like to use the one that is most recent and closest to being standardized (if this is possible).

[MajorBreakfast]

In that case I recommend using the 0.3 branch. It's not yet available on crates.io and currently in pre-alpha state, but most of it already works. Just don't trust any descriptions in the documentation, because in most cases only the code examples were updated to make them compile ;-)

Edit: futures-core 0.3 just reexports the stuff from libcore (plus defines some stuff like Stream). So, it includes exactly what's about to be standardized :P

Edit: Again, don't close this issue until there was a proper announcement about the fate of 0.2