[INFO] crate tokio-cache 0.2.0-alpha.0 is already in cache
[INFO] testing tokio-cache-0.2.0-alpha.0 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate tokio-cache 0.2.0-alpha.0 into work/builds/worker-1/source
[INFO] validating manifest of crates.io crate tokio-cache 0.2.0-alpha.0 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate tokio-cache 0.2.0-alpha.0
[INFO] finished tweaking crates.io crate tokio-cache 0.2.0-alpha.0
[INFO] tweaked toml for crates.io crate tokio-cache 0.2.0-alpha.0 written to work/builds/worker-1/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 360bdc731a6412bd3665efcbc53ec8a7ed5deb58683e492243f0ab1dc9c70641
[INFO] running `"docker" "start" "-a" "360bdc731a6412bd3665efcbc53ec8a7ed5deb58683e492243f0ab1dc9c70641"`
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling im v13.0.0
[INFO] [stderr]    Compiling sized-chunks v0.3.1
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling tokio-sync v0.2.0-alpha.6
[INFO] [stderr]    Compiling tokio-cache v0.2.0-alpha.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `tokio_sync::Lock`
[INFO] [stderr]   --> src/core.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use tokio_sync::Lock;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^ no `Lock` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(async_await)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `tokio-cache`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "360bdc731a6412bd3665efcbc53ec8a7ed5deb58683e492243f0ab1dc9c70641"`
[INFO] running `"docker" "rm" "-f" "360bdc731a6412bd3665efcbc53ec8a7ed5deb58683e492243f0ab1dc9c70641"`
[INFO] [stdout] 360bdc731a6412bd3665efcbc53ec8a7ed5deb58683e492243f0ab1dc9c70641