[INFO] updating cached repository LucioFranco/assets-benchmark
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/LucioFranco/assets-benchmark
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/LucioFranco/assets-benchmark" "work/ex/beta-1.38-1/sources/1.37.0/gh/LucioFranco/assets-benchmark"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/LucioFranco/assets-benchmark'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/LucioFranco/assets-benchmark" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LucioFranco/assets-benchmark"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LucioFranco/assets-benchmark'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8262c1864a0bef122cd555f9cde8b6128f93b91f
[INFO] sha for GitHub repo LucioFranco/assets-benchmark: 8262c1864a0bef122cd555f9cde8b6128f93b91f
[INFO] validating manifest of LucioFranco/assets-benchmark 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 LucioFranco/assets-benchmark 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 LucioFranco/assets-benchmark
[INFO] finished frobbing LucioFranco/assets-benchmark
[INFO] frobbed toml for LucioFranco/assets-benchmark written to work/ex/beta-1.38-1/sources/1.37.0/gh/LucioFranco/assets-benchmark/Cargo.toml
[INFO] started frobbing LucioFranco/assets-benchmark
[INFO] finished frobbing LucioFranco/assets-benchmark
[INFO] frobbed toml for LucioFranco/assets-benchmark written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LucioFranco/assets-benchmark/Cargo.toml
[INFO] crate LucioFranco/assets-benchmark 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] [stderr]     Blocking waiting for file lock on package cache
[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 LucioFranco/assets-benchmark against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/LucioFranco/assets-benchmark:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 100a6f52244827f5f9fdc82852660fc6f990a9d301bed18526a96d1319f42abe
[INFO] running `"docker" "start" "-a" "100a6f52244827f5f9fdc82852660fc6f990a9d301bed18526a96d1319f42abe"`
[INFO] [stderr]    Compiling crossbeam-utils v0.6.2
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling tokio-io v0.1.10
[INFO] [stderr]    Compiling speedometer v0.2.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.1
[INFO] [stderr]    Compiling tokio-timer v0.2.8
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling crossbeam-deque v0.6.2
[INFO] [stderr]    Compiling tokio-threadpool v0.1.9
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling tokio-reactor v0.1.7
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-uds v0.2.4
[INFO] [stderr]    Compiling tokio-tcp v0.1.2
[INFO] [stderr]    Compiling tokio-fs v0.1.4
[INFO] [stderr]    Compiling tokio v0.1.13
[INFO] [stderr]    Compiling assets-benchmark v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(duration_as_u128)]
[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 `assets-benchmark`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "100a6f52244827f5f9fdc82852660fc6f990a9d301bed18526a96d1319f42abe"`
[INFO] running `"docker" "rm" "-f" "100a6f52244827f5f9fdc82852660fc6f990a9d301bed18526a96d1319f42abe"`
[INFO] [stdout] 100a6f52244827f5f9fdc82852660fc6f990a9d301bed18526a96d1319f42abe