[INFO] updating cached repository VaclavStebra/rust-book-slices
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/VaclavStebra/rust-book-slices
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/VaclavStebra/rust-book-slices" "work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/VaclavStebra/rust-book-slices"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/VaclavStebra/rust-book-slices'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/VaclavStebra/rust-book-slices" "work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/VaclavStebra/rust-book-slices"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/VaclavStebra/rust-book-slices'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bdf432f1c8082f6b7b0697b704a641f579905b1d
[INFO] sha for GitHub repo VaclavStebra/rust-book-slices: bdf432f1c8082f6b7b0697b704a641f579905b1d
[INFO] validating manifest of VaclavStebra/rust-book-slices on toolchain master#6ecad338381cc3b8d56e2df22e5971a598eddd6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of VaclavStebra/rust-book-slices on toolchain try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing VaclavStebra/rust-book-slices
[INFO] finished frobbing VaclavStebra/rust-book-slices
[INFO] frobbed toml for VaclavStebra/rust-book-slices written to work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/VaclavStebra/rust-book-slices/Cargo.toml
[INFO] started frobbing VaclavStebra/rust-book-slices
[INFO] finished frobbing VaclavStebra/rust-book-slices
[INFO] frobbed toml for VaclavStebra/rust-book-slices written to work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/VaclavStebra/rust-book-slices/Cargo.toml
[INFO] crate VaclavStebra/rust-book-slices has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking VaclavStebra/rust-book-slices against try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f for pr-57501
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57501/worker-1/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/VaclavStebra/rust-book-slices:/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=forbid" "-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" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] fdd401cb313d91c5902247070daf0e3776b1cd5638cf415a8d68538c2cc8ebfa
[INFO] running `"docker" "start" "-a" "fdd401cb313d91c5902247070daf0e3776b1cd5638cf415a8d68538c2cc8ebfa"`
[INFO] [stderr]     Checking rust-book-slices v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `"docker" "inspect" "fdd401cb313d91c5902247070daf0e3776b1cd5638cf415a8d68538c2cc8ebfa"`
[INFO] running `"docker" "rm" "-f" "fdd401cb313d91c5902247070daf0e3776b1cd5638cf415a8d68538c2cc8ebfa"`
[INFO] [stdout] fdd401cb313d91c5902247070daf0e3776b1cd5638cf415a8d68538c2cc8ebfa