[INFO] cloning repository peter-wilkins-mayden/percolation
[INFO] running `"git" "clone" "--bare" "git://github.com/peter-wilkins-mayden/percolation.git" "work/cache/sources/gh/peter-wilkins-mayden/percolation"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/peter-wilkins-mayden/percolation'...
[INFO] running `"git" "clone" "work/cache/sources/gh/peter-wilkins-mayden/percolation" "work/ex/beta-1.37-6/sources/1.36.0/gh/peter-wilkins-mayden/percolation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/peter-wilkins-mayden/percolation'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/peter-wilkins-mayden/percolation" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/peter-wilkins-mayden/percolation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/peter-wilkins-mayden/percolation'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 56392c28377f4d6615d990b0d4f7e36133a41822
[INFO] sha for GitHub repo peter-wilkins-mayden/percolation: 56392c28377f4d6615d990b0d4f7e36133a41822
[INFO] validating manifest of peter-wilkins-mayden/percolation 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 peter-wilkins-mayden/percolation 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 peter-wilkins-mayden/percolation
[INFO] finished frobbing peter-wilkins-mayden/percolation
[INFO] frobbed toml for peter-wilkins-mayden/percolation written to work/ex/beta-1.37-6/sources/1.36.0/gh/peter-wilkins-mayden/percolation/Cargo.toml
[INFO] started frobbing peter-wilkins-mayden/percolation
[INFO] finished frobbing peter-wilkins-mayden/percolation
[INFO] frobbed toml for peter-wilkins-mayden/percolation written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/peter-wilkins-mayden/percolation/Cargo.toml
[INFO] crate peter-wilkins-mayden/percolation already has a lockfile, it will not be regenerated
[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 peter-wilkins-mayden/percolation 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-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/peter-wilkins-mayden/percolation:/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] f507ec605179d752b04213ad249c4317e2c986eb963831e4f183435879f9720b
[INFO] running `"docker" "start" "-a" "f507ec605179d752b04213ad249c4317e2c986eb963831e4f183435879f9720b"`
[INFO] [stderr]    Compiling getrandom v0.1.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling rayon v1.1.0
[INFO] [stderr]    Compiling perc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[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 `perc`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f507ec605179d752b04213ad249c4317e2c986eb963831e4f183435879f9720b"`
[INFO] running `"docker" "rm" "-f" "f507ec605179d752b04213ad249c4317e2c986eb963831e4f183435879f9720b"`
[INFO] [stdout] f507ec605179d752b04213ad249c4317e2c986eb963831e4f183435879f9720b