[INFO] updating cached repository bgmarx/recommender
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bgmarx/recommender
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bgmarx/recommender" "work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/bgmarx/recommender"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/bgmarx/recommender'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bgmarx/recommender" "work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/bgmarx/recommender"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/bgmarx/recommender'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] db93a013d779f4cbfc6146ebca9045c0f19a84c4
[INFO] sha for GitHub repo bgmarx/recommender: db93a013d779f4cbfc6146ebca9045c0f19a84c4
[INFO] validating manifest of bgmarx/recommender on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of bgmarx/recommender on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing bgmarx/recommender
[INFO] finished frobbing bgmarx/recommender
[INFO] frobbed toml for bgmarx/recommender written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/bgmarx/recommender/Cargo.toml
[INFO] started frobbing bgmarx/recommender
[INFO] finished frobbing bgmarx/recommender
[INFO] frobbed toml for bgmarx/recommender written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/bgmarx/recommender/Cargo.toml
[INFO] crate bgmarx/recommender has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking bgmarx/recommender against try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-4/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/bgmarx/recommender:/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" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9ac245d34b9ef53835bd1aeaa0a1562c0334c75d9b5103e2d8839ebd59c706ca
[INFO] running `"docker" "start" "-a" "9ac245d34b9ef53835bd1aeaa0a1562c0334c75d9b5103e2d8839ebd59c706ca"`
[INFO] [stderr]    Compiling ndarray v0.11.2
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]    Compiling syn v0.14.7
[INFO] [stderr]     Checking backtrace-sys v0.1.23
[INFO] [stderr]     Checking smallvec v0.5.1
[INFO] [stderr]     Checking bincode v0.9.2
[INFO] [stderr]     Checking tokio-reactor v0.1.2
[INFO] [stderr]     Checking serde_urlencoded v0.5.2
[INFO] [stderr]     Checking tokio-threadpool v0.1.5
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]     Checking csv-core v0.1.4
[INFO] [stderr]     Checking hibitset v0.5.1
[INFO] [stderr]     Checking mime_guess v2.0.0-alpha.6
[INFO] [stderr]     Checking tokio-tcp v0.1.0
[INFO] [stderr]     Checking tokio-udp v0.1.1
[INFO] [stderr]     Checking csv v1.0.0
[INFO] [stderr]     Checking tokio-fs v0.1.2
[INFO] [stderr]     Checking tokio v0.1.7
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stderr]     Checking tokio-tls v0.1.4
[INFO] [stderr]     Checking hyper v0.11.27
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]     Checking hyper-tls v0.1.4
[INFO] [stderr]     Checking reqwest v0.8.7
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking rand v0.5.4
[INFO] [stderr]     Checking wyrm v0.9.1
[INFO] [stderr]     Checking sbr v0.4.0
[INFO] [stderr]     Checking goodbooks-recommender v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `title_to_id`
[INFO] [stderr]    --> src/main.rs:226:10
[INFO] [stderr]     |
[INFO] [stderr] 226 |          title_to_id) = deserialize_books(books_path).unwrap();
[INFO] [stderr]     |          ^^^^^^^^^^^ help: consider prefixing with an underscore: `_title_to_id`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `title_to_id`
[INFO] [stderr]    --> src/main.rs:226:10
[INFO] [stderr]     |
[INFO] [stderr] 226 |          title_to_id) = deserialize_books(books_path).unwrap();
[INFO] [stderr]     |          ^^^^^^^^^^^ help: consider prefixing with an underscore: `_title_to_id`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.86s
[INFO] running `"docker" "inspect" "9ac245d34b9ef53835bd1aeaa0a1562c0334c75d9b5103e2d8839ebd59c706ca"`
[INFO] running `"docker" "rm" "-f" "9ac245d34b9ef53835bd1aeaa0a1562c0334c75d9b5103e2d8839ebd59c706ca"`
[INFO] [stdout] 9ac245d34b9ef53835bd1aeaa0a1562c0334c75d9b5103e2d8839ebd59c706ca