[INFO] updating cached repository ivanovaleksey/exonum-employees
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ivanovaleksey/exonum-employees
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ivanovaleksey/exonum-employees" "work/ex/beta-1.38-1/sources/1.37.0/gh/ivanovaleksey/exonum-employees"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ivanovaleksey/exonum-employees'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ivanovaleksey/exonum-employees" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ivanovaleksey/exonum-employees"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ivanovaleksey/exonum-employees'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c691b0b3fae052e40bd17caf82d6c991eb0cc354
[INFO] sha for GitHub repo ivanovaleksey/exonum-employees: c691b0b3fae052e40bd17caf82d6c991eb0cc354
[INFO] validating manifest of ivanovaleksey/exonum-employees 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 ivanovaleksey/exonum-employees 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 ivanovaleksey/exonum-employees
[INFO] finished frobbing ivanovaleksey/exonum-employees
[INFO] frobbed toml for ivanovaleksey/exonum-employees written to work/ex/beta-1.38-1/sources/1.37.0/gh/ivanovaleksey/exonum-employees/Cargo.toml
[INFO] started frobbing ivanovaleksey/exonum-employees
[INFO] finished frobbing ivanovaleksey/exonum-employees
[INFO] frobbed toml for ivanovaleksey/exonum-employees written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ivanovaleksey/exonum-employees/Cargo.toml
[INFO] crate ivanovaleksey/exonum-employees 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing ivanovaleksey/exonum-employees 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-2/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/ivanovaleksey/exonum-employees:/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] 70866db7c65eb579358c5232ca80b556946fa68bfe5d04201859a67262d7496d
[INFO] running `"docker" "start" "-a" "70866db7c65eb579358c5232ca80b556946fa68bfe5d04201859a67262d7496d"`
[INFO] [stderr]    Compiling futures v0.1.19
[INFO] [stderr]    Compiling serde v1.0.34
[INFO] [stderr]    Compiling unwrap v1.1.0
[INFO] [stderr]    Compiling os_info v0.7.0
[INFO] [stderr]    Compiling route-recognizer v0.1.12
[INFO] [stderr]    Compiling sequence_trie v0.3.5
[INFO] [stderr]    Compiling exonum v0.6.0
[INFO] [stderr]    Compiling headers v0.1.0
[INFO] [stderr] error[E0658]: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/route-recognizer-0.1.12/src/nfa.rs:568:3
[INFO] [stderr]     |
[INFO] [stderr] 568 | #[bench]
[INFO] [stderr]     |   ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/50297
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/route-recognizer-0.1.12/src/nfa.rs:582:3
[INFO] [stderr]     |
[INFO] [stderr] 582 | #[bench]
[INFO] [stderr]     |   ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/50297
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/route-recognizer-0.1.12/src/nfa.rs:596:3
[INFO] [stderr]     |
[INFO] [stderr] 596 | #[bench]
[INFO] [stderr]     |   ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/50297
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/route-recognizer-0.1.12/src/lib.rs:332:3
[INFO] [stderr]     |
[INFO] [stderr] 332 | #[bench]
[INFO] [stderr]     |   ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/50297
[INFO] [stderr] 
[INFO] [stderr]    Compiling hex v0.3.1
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `route-recognizer`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "70866db7c65eb579358c5232ca80b556946fa68bfe5d04201859a67262d7496d"`
[INFO] running `"docker" "rm" "-f" "70866db7c65eb579358c5232ca80b556946fa68bfe5d04201859a67262d7496d"`
[INFO] [stdout] 70866db7c65eb579358c5232ca80b556946fa68bfe5d04201859a67262d7496d