[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-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/Gisleburt/Skitty"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/Gisleburt/Skitty'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Gisleburt/Skitty" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/Gisleburt/Skitty"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/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#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Gisleburt/Skitty on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-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-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/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-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/Gisleburt/Skitty/Cargo.toml
[INFO] crate Gisleburt/Skitty already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Gisleburt/Skitty against master#39401465da4ce27aeeb2c2a26133ac35c63aa515 for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-3/master#39401465da4ce27aeeb2c2a26133ac35c63aa515:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/Gisleburt/Skitty:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 91ab61db485ca874698ca07566e7c9bf41f291a06a7d866cedb69c7bddcbfd48
[INFO] running `"docker" "start" "-a" "91ab61db485ca874698ca07566e7c9bf41f291a06a7d866cedb69c7bddcbfd48"`
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.1.3
[INFO] [stderr]    Compiling bzip2-sys v0.1.6
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]     Checking flate2 v1.0.2
[INFO] [stderr]     Checking notify v4.0.6
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking zip v0.4.2
[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 17.20s
[INFO] running `"docker" "inspect" "91ab61db485ca874698ca07566e7c9bf41f291a06a7d866cedb69c7bddcbfd48"`
[INFO] running `"docker" "rm" "-f" "91ab61db485ca874698ca07566e7c9bf41f291a06a7d866cedb69c7bddcbfd48"`
[INFO] [stdout] 91ab61db485ca874698ca07566e7c9bf41f291a06a7d866cedb69c7bddcbfd48