[INFO] updating cached repository killercup/recycle_ebooks
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/killercup/recycle_ebooks
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/killercup/recycle_ebooks" "work/ex/beta-1.37-6/sources/1.36.0/gh/killercup/recycle_ebooks"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/killercup/recycle_ebooks'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/killercup/recycle_ebooks" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/killercup/recycle_ebooks"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/killercup/recycle_ebooks'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 47dbef1e6aa2385f5b048bf49cfd8058244a1606
[INFO] sha for GitHub repo killercup/recycle_ebooks: 47dbef1e6aa2385f5b048bf49cfd8058244a1606
[INFO] validating manifest of killercup/recycle_ebooks 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 killercup/recycle_ebooks 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 killercup/recycle_ebooks
[INFO] finished frobbing killercup/recycle_ebooks
[INFO] frobbed toml for killercup/recycle_ebooks written to work/ex/beta-1.37-6/sources/1.36.0/gh/killercup/recycle_ebooks/Cargo.toml
[INFO] started frobbing killercup/recycle_ebooks
[INFO] finished frobbing killercup/recycle_ebooks
[INFO] frobbed toml for killercup/recycle_ebooks written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/killercup/recycle_ebooks/Cargo.toml
[INFO] crate killercup/recycle_ebooks 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/killercup/recycle_ebooks/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[INFO] the lockfile is outdated, regenerating it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" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 killercup/recycle_ebooks against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/killercup/recycle_ebooks:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 9968b1ab237dc2a49f568c647bf5b730b511f55de5c4796456964379bf7df5e7
[INFO] running `"docker" "start" "-a" "9968b1ab237dc2a49f568c647bf5b730b511f55de5c4796456964379bf7df5e7"`
[INFO] [stderr]    Compiling markov v0.0.32
[INFO] [stderr]    Compiling rayon v0.4.3
[INFO] [stderr]    Compiling dotenv v0.8.0
[INFO] [stderr]    Compiling recycle_ebooks v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: constant item is never used: `ENGLISH`
[INFO] [stderr]   --> src/main.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | / const ENGLISH: &'static [&'static str; 3] = &[
[INFO] [stderr] 19 | |     "conquest_of_bread",
[INFO] [stderr] 20 | |     "structure-and-interpretation-of-computer-programs",
[INFO] [stderr] 21 | |     "alice_oz",
[INFO] [stderr] 22 | | ];
[INFO] [stderr]    | |__^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.77s
[INFO] running `"docker" "inspect" "9968b1ab237dc2a49f568c647bf5b730b511f55de5c4796456964379bf7df5e7"`
[INFO] running `"docker" "rm" "-f" "9968b1ab237dc2a49f568c647bf5b730b511f55de5c4796456964379bf7df5e7"`
[INFO] [stdout] 9968b1ab237dc2a49f568c647bf5b730b511f55de5c4796456964379bf7df5e7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/killercup/recycle_ebooks:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] f62ab59ec268020bcf0e3096e1962b30048a94653704ac9c8a7ce354c77d6058
[INFO] running `"docker" "start" "-a" "f62ab59ec268020bcf0e3096e1962b30048a94653704ac9c8a7ce354c77d6058"`
[INFO] [stderr]    Compiling recycle_ebooks v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: constant item is never used: `ENGLISH`
[INFO] [stderr]   --> src/main.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | / const ENGLISH: &'static [&'static str; 3] = &[
[INFO] [stderr] 19 | |     "conquest_of_bread",
[INFO] [stderr] 20 | |     "structure-and-interpretation-of-computer-programs",
[INFO] [stderr] 21 | |     "alice_oz",
[INFO] [stderr] 22 | | ];
[INFO] [stderr]    | |__^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `"docker" "inspect" "f62ab59ec268020bcf0e3096e1962b30048a94653704ac9c8a7ce354c77d6058"`
[INFO] running `"docker" "rm" "-f" "f62ab59ec268020bcf0e3096e1962b30048a94653704ac9c8a7ce354c77d6058"`
[INFO] [stdout] f62ab59ec268020bcf0e3096e1962b30048a94653704ac9c8a7ce354c77d6058
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/killercup/recycle_ebooks:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] f3a5422bd6f384e2efac3d25d4db15b1505946c42c6a800686f71b8315dfb000
[INFO] running `"docker" "start" "-a" "f3a5422bd6f384e2efac3d25d4db15b1505946c42c6a800686f71b8315dfb000"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/recycle_ebooks-4dd964036f5abdd7
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f3a5422bd6f384e2efac3d25d4db15b1505946c42c6a800686f71b8315dfb000"`
[INFO] running `"docker" "rm" "-f" "f3a5422bd6f384e2efac3d25d4db15b1505946c42c6a800686f71b8315dfb000"`
[INFO] [stdout] f3a5422bd6f384e2efac3d25d4db15b1505946c42c6a800686f71b8315dfb000