[INFO] updating cached repository Gisleburt/Skitty
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Gisleburt/Skitty
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Gisleburt/Skitty" "work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/Gisleburt/Skitty"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/Gisleburt/Skitty'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Gisleburt/Skitty" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/Gisleburt/Skitty"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/Gisleburt/Skitty'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a9a1b8a8fcd99473697944e74e99bf2702ccb525
[INFO] sha for GitHub repo Gisleburt/Skitty: a9a1b8a8fcd99473697944e74e99bf2702ccb525
[INFO] validating manifest of Gisleburt/Skitty on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Gisleburt/Skitty on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Gisleburt/Skitty
[INFO] finished frobbing Gisleburt/Skitty
[INFO] frobbed toml for Gisleburt/Skitty written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/Gisleburt/Skitty/Cargo.toml
[INFO] started frobbing Gisleburt/Skitty
[INFO] finished frobbing Gisleburt/Skitty
[INFO] frobbed toml for Gisleburt/Skitty written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/Gisleburt/Skitty/Cargo.toml
[INFO] crate Gisleburt/Skitty already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Gisleburt/Skitty against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-7/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/Gisleburt/Skitty:/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" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 13f2947111d47d75f5f74e6b5fc8eeae2dc314fb7cdd31ec5fb29a841c2c437d
[INFO] running `"docker" "start" "-a" "13f2947111d47d75f5f74e6b5fc8eeae2dc314fb7cdd31ec5fb29a841c2c437d"`
[INFO] [stderr]    Compiling bzip2-sys v0.1.6
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.1.3
[INFO] [stderr]     Checking tokio-executor v0.1.4
[INFO] [stderr]    Compiling proc-macro2 v0.4.16
[INFO] [stderr]     Checking parking_lot_core v0.3.0
[INFO] [stderr]     Checking tokio-io v0.1.8
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking serde_json v1.0.26
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking flate2 v1.0.2
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]     Checking tokio-reactor v0.1.5
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking zip v0.4.2
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]     Checking notify v4.0.6
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]     Checking skitty v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/project/zip_tools.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let mut file = zip.by_index(i)?;
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/project/zip_tools.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let mut file = zip.by_index(i)?;
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.78s
[INFO] running `"docker" "inspect" "13f2947111d47d75f5f74e6b5fc8eeae2dc314fb7cdd31ec5fb29a841c2c437d"`
[INFO] running `"docker" "rm" "-f" "13f2947111d47d75f5f74e6b5fc8eeae2dc314fb7cdd31ec5fb29a841c2c437d"`
[INFO] [stdout] 13f2947111d47d75f5f74e6b5fc8eeae2dc314fb7cdd31ec5fb29a841c2c437d