[INFO] cloning repository ruiramos/rust-book-exercises
[INFO] running `"git" "clone" "--bare" "git://github.com/ruiramos/rust-book-exercises.git" "work/cache/sources/gh/ruiramos/rust-book-exercises"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/ruiramos/rust-book-exercises'...
[INFO] running `"git" "clone" "work/cache/sources/gh/ruiramos/rust-book-exercises" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/ruiramos/rust-book-exercises"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/ruiramos/rust-book-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ruiramos/rust-book-exercises" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/ruiramos/rust-book-exercises"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/ruiramos/rust-book-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] dbe8092108e6e0e73d42620714b15de4e7496922
[INFO] sha for GitHub repo ruiramos/rust-book-exercises: dbe8092108e6e0e73d42620714b15de4e7496922
[INFO] validating manifest of ruiramos/rust-book-exercises on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ruiramos/rust-book-exercises on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ruiramos/rust-book-exercises
[INFO] finished frobbing ruiramos/rust-book-exercises
[INFO] frobbed toml for ruiramos/rust-book-exercises written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/ruiramos/rust-book-exercises/Cargo.toml
[INFO] started frobbing ruiramos/rust-book-exercises
[INFO] finished frobbing ruiramos/rust-book-exercises
[INFO] frobbed toml for ruiramos/rust-book-exercises written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/ruiramos/rust-book-exercises/Cargo.toml
[INFO] crate ruiramos/rust-book-exercises already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ruiramos/rust-book-exercises against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-3/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/ruiramos/rust-book-exercises:/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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 5e1fd35da7fd6366bdd28fadae7651b8c8949e1db495d6cd51eec6cab85e6ca2
[INFO] running `"docker" "start" "-a" "5e1fd35da7fd6366bdd28fadae7651b8c8949e1db495d6cd51eec6cab85e6ca2"`
[INFO] [stderr]     Checking rust-book-exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.43s
[INFO] running `"docker" "inspect" "5e1fd35da7fd6366bdd28fadae7651b8c8949e1db495d6cd51eec6cab85e6ca2"`
[INFO] running `"docker" "rm" "-f" "5e1fd35da7fd6366bdd28fadae7651b8c8949e1db495d6cd51eec6cab85e6ca2"`
[INFO] [stdout] 5e1fd35da7fd6366bdd28fadae7651b8c8949e1db495d6cd51eec6cab85e6ca2