[INFO] updating cached repository stanistan/sudokrust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/stanistan/sudokrust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/stanistan/sudokrust" "work/ex/beta-1.38-1/sources/1.37.0/gh/stanistan/sudokrust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/stanistan/sudokrust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/stanistan/sudokrust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stanistan/sudokrust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stanistan/sudokrust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7e684c305d759302d929cae2fa0860691ca2e1bc
[INFO] sha for GitHub repo stanistan/sudokrust: 7e684c305d759302d929cae2fa0860691ca2e1bc
[INFO] validating manifest of stanistan/sudokrust 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 stanistan/sudokrust 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 stanistan/sudokrust
[INFO] finished frobbing stanistan/sudokrust
[INFO] frobbed toml for stanistan/sudokrust written to work/ex/beta-1.38-1/sources/1.37.0/gh/stanistan/sudokrust/Cargo.toml
[INFO] started frobbing stanistan/sudokrust
[INFO] finished frobbing stanistan/sudokrust
[INFO] frobbed toml for stanistan/sudokrust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stanistan/sudokrust/Cargo.toml
[INFO] crate stanistan/sudokrust 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] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/stanistan/sudokrust/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 stanistan/sudokrust 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-3/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/stanistan/sudokrust:/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] cfc2cb7de3c5cf3178c36e20ac6285745cf502f09e2f814c4e524f8c00085227
[INFO] running `"docker" "start" "-a" "cfc2cb7de3c5cf3178c36e20ac6285745cf502f09e2f814c4e524f8c00085227"`
[INFO] [stderr]    Compiling sudokrust v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(core)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(collections)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the trait bound `position::Position: std::clone::Clone` is not satisfied
[INFO] [stderr]  --> src/position.rs:7:32
[INFO] [stderr]   |
[INFO] [stderr] 7 | #[derive(PartialEq, Eq, Debug, Copy)]
[INFO] [stderr]   |                                ^^^^ the trait `std::clone::Clone` is not implemented for `position::Position`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `sudokrust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "cfc2cb7de3c5cf3178c36e20ac6285745cf502f09e2f814c4e524f8c00085227"`
[INFO] running `"docker" "rm" "-f" "cfc2cb7de3c5cf3178c36e20ac6285745cf502f09e2f814c4e524f8c00085227"`
[INFO] [stdout] cfc2cb7de3c5cf3178c36e20ac6285745cf502f09e2f814c4e524f8c00085227