[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/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/killercup/recycle_ebooks"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/killercup/recycle_ebooks'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/killercup/recycle_ebooks" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/killercup/recycle_ebooks"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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 master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of killercup/recycle_ebooks on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "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/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/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/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/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" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking killercup/recycle_ebooks against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-3/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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=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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 203e8a6f19390930bdbe94e173d40af9a5c72849b7e0e294a07791d77c534c7e
[INFO] running `"docker" "start" "-a" "203e8a6f19390930bdbe94e173d40af9a5c72849b7e0e294a07791d77c534c7e"`
[INFO] [stderr]     Checking rayon v0.4.3
[INFO] [stderr]     Checking markov v0.0.32
[INFO] [stderr]     Checking dotenv v0.8.0
[INFO] [stderr]     Checking 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] 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 3.39s
[INFO] running `"docker" "inspect" "203e8a6f19390930bdbe94e173d40af9a5c72849b7e0e294a07791d77c534c7e"`
[INFO] running `"docker" "rm" "-f" "203e8a6f19390930bdbe94e173d40af9a5c72849b7e0e294a07791d77c534c7e"`
[INFO] [stdout] 203e8a6f19390930bdbe94e173d40af9a5c72849b7e0e294a07791d77c534c7e