[INFO] updating cached repository raj-maurya/rust-hack
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/raj-maurya/rust-hack
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/raj-maurya/rust-hack" "work/ex/beta-1.38-1/sources/1.37.0/gh/raj-maurya/rust-hack"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/raj-maurya/rust-hack'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/raj-maurya/rust-hack" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/raj-maurya/rust-hack"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/raj-maurya/rust-hack'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3530a18ba27a752db923301fccfd8b9dc7999b53
[INFO] sha for GitHub repo raj-maurya/rust-hack: 3530a18ba27a752db923301fccfd8b9dc7999b53
[INFO] validating manifest of raj-maurya/rust-hack on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of raj-maurya/rust-hack on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing raj-maurya/rust-hack
[INFO] finished frobbing raj-maurya/rust-hack
[INFO] frobbed toml for raj-maurya/rust-hack written to work/ex/beta-1.38-1/sources/1.37.0/gh/raj-maurya/rust-hack/Cargo.toml
[INFO] started frobbing raj-maurya/rust-hack
[INFO] finished frobbing raj-maurya/rust-hack
[INFO] frobbed toml for raj-maurya/rust-hack written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/raj-maurya/rust-hack/Cargo.toml
[INFO] crate raj-maurya/rust-hack already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing raj-maurya/rust-hack against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/raj-maurya/rust-hack:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] b6464a3a629e2da2ee2f36de93ebd5e94e36510fcd3162134868c17db922e721
[INFO] running `"docker" "start" "-a" "b6464a3a629e2da2ee2f36de93ebd5e94e36510fcd3162134868c17db922e721"`
[INFO] [stderr]    Compiling version_check v0.1.0
[INFO] [stderr]    Compiling term v0.4.5
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling state v0.2.0
[INFO] [stderr]    Compiling num_cpus v1.3.0
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling hyper v0.10.5
[INFO] [stderr]    Compiling idna v0.1.0
[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/state-0.2.0/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(const_fn)]
[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 `state`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "b6464a3a629e2da2ee2f36de93ebd5e94e36510fcd3162134868c17db922e721"`
[INFO] running `"docker" "rm" "-f" "b6464a3a629e2da2ee2f36de93ebd5e94e36510fcd3162134868c17db922e721"`
[INFO] [stdout] b6464a3a629e2da2ee2f36de93ebd5e94e36510fcd3162134868c17db922e721