[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/beta-1.37-6/sources/1.36.0/gh/Gisleburt/Skitty"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Gisleburt/Skitty'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Gisleburt/Skitty" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Gisleburt/Skitty"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 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 Gisleburt/Skitty 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 Gisleburt/Skitty
[INFO] finished frobbing Gisleburt/Skitty
[INFO] frobbed toml for Gisleburt/Skitty written to work/ex/beta-1.37-6/sources/1.36.0/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/beta-1.37-6/sources/beta-2019-07-23/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" "+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 Gisleburt/Skitty 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-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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=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] dad37dcec6901fee3bfe46d14f976075c943f17100249a306d7804ceeeb3afe3
[INFO] running `"docker" "start" "-a" "dad37dcec6901fee3bfe46d14f976075c943f17100249a306d7804ceeeb3afe3"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.16
[INFO] [stderr]    Compiling cc v1.0.23
[INFO] [stderr]    Compiling futures v0.1.23
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]    Compiling serde v1.0.76
[INFO] [stderr]    Compiling same-file v1.0.3
[INFO] [stderr]    Compiling lazycell v1.0.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.9
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling log v0.4.4
[INFO] [stderr]    Compiling filetime v0.2.1
[INFO] [stderr]    Compiling miniz_oxide v0.1.3
[INFO] [stderr]    Compiling walkdir v2.2.5
[INFO] [stderr]    Compiling bytes v0.4.9
[INFO] [stderr]    Compiling msdos_time v0.1.6
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling parking_lot_core v0.3.0
[INFO] [stderr]    Compiling mio v0.6.15
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling bzip2-sys v0.1.6
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.1.3
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling backtrace v0.3.9
[INFO] [stderr]    Compiling flate2 v1.0.2
[INFO] [stderr]    Compiling tokio-io v0.1.8
[INFO] [stderr]    Compiling tokio-executor v0.1.4
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling zip v0.4.2
[INFO] [stderr]    Compiling tokio-reactor v0.1.5
[INFO] [stderr]    Compiling inotify v0.6.1
[INFO] [stderr]    Compiling notify v4.0.6
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.26
[INFO] [stderr]    Compiling failure v0.1.2
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 58.33s
[INFO] running `"docker" "inspect" "dad37dcec6901fee3bfe46d14f976075c943f17100249a306d7804ceeeb3afe3"`
[INFO] running `"docker" "rm" "-f" "dad37dcec6901fee3bfe46d14f976075c943f17100249a306d7804ceeeb3afe3"`
[INFO] [stdout] dad37dcec6901fee3bfe46d14f976075c943f17100249a306d7804ceeeb3afe3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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=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] b22025a3a5f62283777d0b8ef92936388b37a8b3d90a1282a630f54a95e6b293
[INFO] running `"docker" "start" "-a" "b22025a3a5f62283777d0b8ef92936388b37a8b3d90a1282a630f54a95e6b293"`
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "b22025a3a5f62283777d0b8ef92936388b37a8b3d90a1282a630f54a95e6b293"`
[INFO] running `"docker" "rm" "-f" "b22025a3a5f62283777d0b8ef92936388b37a8b3d90a1282a630f54a95e6b293"`
[INFO] [stdout] b22025a3a5f62283777d0b8ef92936388b37a8b3d90a1282a630f54a95e6b293
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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=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] 76e441fe4cb4ffc713951ed51d2905f92e0351d8d90bc9d754c2e2f0aa991b64
[INFO] running `"docker" "start" "-a" "76e441fe4cb4ffc713951ed51d2905f92e0351d8d90bc9d754c2e2f0aa991b64"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.22s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/skitty-6b4beb786e589b41
[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] [stderr]      Running /opt/crater/target/debug/deps/skitty-2aceffce9eef19ca
[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] [stderr]    Doc-tests skitty
[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" "76e441fe4cb4ffc713951ed51d2905f92e0351d8d90bc9d754c2e2f0aa991b64"`
[INFO] running `"docker" "rm" "-f" "76e441fe4cb4ffc713951ed51d2905f92e0351d8d90bc9d754c2e2f0aa991b64"`
[INFO] [stdout] 76e441fe4cb4ffc713951ed51d2905f92e0351d8d90bc9d754c2e2f0aa991b64