[INFO] fetching crate http-service-hyper 0.4.0...
[INFO] extracting crate http-service-hyper 0.4.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/http-service-hyper/0.4.0
[INFO] extracting crate http-service-hyper 0.4.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/http-service-hyper/0.4.0
[INFO] validating manifest of http-service-hyper-0.4.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of http-service-hyper-0.4.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing http-service-hyper-0.4.0
[INFO] finished frobbing http-service-hyper-0.4.0
[INFO] frobbed toml for http-service-hyper-0.4.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/http-service-hyper/0.4.0/Cargo.toml
[INFO] started frobbing http-service-hyper-0.4.0
[INFO] finished frobbing http-service-hyper-0.4.0
[INFO] frobbed toml for http-service-hyper-0.4.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/http-service-hyper/0.4.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing http-service-hyper-0.4.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/http-service-hyper/0.4.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 8ebbc097baaaa2c8f647a2d8a453d41c6c420918b7ca7e13bc9d69ccd96565be
[INFO] running `"docker" "start" "-a" "8ebbc097baaaa2c8f647a2d8a453d41c6c420918b7ca7e13bc9d69ccd96565be"`
[INFO] [stderr]    Compiling hyper v0.12.33
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling http-service v0.3.0
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/http-service-0.3.0/src/lib.rs:58:1
[INFO] [stderr]    |
[INFO] [stderr] 58 | #![feature(async_await, arbitrary_self_types)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `http-service`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8ebbc097baaaa2c8f647a2d8a453d41c6c420918b7ca7e13bc9d69ccd96565be"`
[INFO] running `"docker" "rm" "-f" "8ebbc097baaaa2c8f647a2d8a453d41c6c420918b7ca7e13bc9d69ccd96565be"`
[INFO] [stdout] 8ebbc097baaaa2c8f647a2d8a453d41c6c420918b7ca7e13bc9d69ccd96565be