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# rustc version
rustc 1.28.0-dev (b9bf4f162 2018-06-02)# docs.rs version
cratesfyi 0.5.0 (579f83b 2018-03-05)# build log
Updating registry `https://github.com/rust-lang/crates.io-index`
Downloading futures-io-preview v0.3.0-alpha.3
thread 'main' panicked at 'Error(
CargoError(
no matching version `^0.3.0-alpha.3` found for package `futures-preview` (required by `futures-io-preview`)
location searched: registry https://github.com/rust-lang/crates.io-index
versions found: 0.2.2
),
State {
next_error: None,
backtrace: None
}
)', src/bin/cratesfyi.rs:142:13
note: Run with `RUST_BACKTRACE=1` for a backtrace.