[INFO] updating cached repository marcbreitung/problem-map-generator-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/marcbreitung/problem-map-generator-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/marcbreitung/problem-map-generator-rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/marcbreitung/problem-map-generator-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/marcbreitung/problem-map-generator-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/marcbreitung/problem-map-generator-rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/marcbreitung/problem-map-generator-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/marcbreitung/problem-map-generator-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e354237c833a9b9f15d0a2f9c757a86d6bcd8c99
[INFO] sha for GitHub repo marcbreitung/problem-map-generator-rust: e354237c833a9b9f15d0a2f9c757a86d6bcd8c99
[INFO] validating manifest of marcbreitung/problem-map-generator-rust 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 marcbreitung/problem-map-generator-rust 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 marcbreitung/problem-map-generator-rust
[INFO] finished frobbing marcbreitung/problem-map-generator-rust
[INFO] frobbed toml for marcbreitung/problem-map-generator-rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/marcbreitung/problem-map-generator-rust/Cargo.toml
[INFO] started frobbing marcbreitung/problem-map-generator-rust
[INFO] finished frobbing marcbreitung/problem-map-generator-rust
[INFO] frobbed toml for marcbreitung/problem-map-generator-rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/marcbreitung/problem-map-generator-rust/Cargo.toml
[INFO] crate marcbreitung/problem-map-generator-rust 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]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing marcbreitung/problem-map-generator-rust against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/marcbreitung/problem-map-generator-rust:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 2c94c7f7a38f94d0b0e1e7b2e4986a88cabf8a99321a1cc0c963453c3038da08
[INFO] running `"docker" "start" "-a" "2c94c7f7a38f94d0b0e1e7b2e4986a88cabf8a99321a1cc0c963453c3038da08"`
[INFO] [stderr]    Compiling serde v1.0.32
[INFO] [stderr]    Compiling num-traits v0.2.1
[INFO] [stderr]    Compiling serde_derive_internals v0.20.1
[INFO] [stderr]    Compiling serde_derive v1.0.32
[INFO] [stderr]    Compiling serde_json v1.0.11
[INFO] [stderr]    Compiling problem_map_generator v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let mut neighbours = get_neighbours(&leaves, &leave);
[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 21.47s
[INFO] running `"docker" "inspect" "2c94c7f7a38f94d0b0e1e7b2e4986a88cabf8a99321a1cc0c963453c3038da08"`
[INFO] running `"docker" "rm" "-f" "2c94c7f7a38f94d0b0e1e7b2e4986a88cabf8a99321a1cc0c963453c3038da08"`
[INFO] [stdout] 2c94c7f7a38f94d0b0e1e7b2e4986a88cabf8a99321a1cc0c963453c3038da08
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/marcbreitung/problem-map-generator-rust:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 252b51d468bca0328845acbe48480b728b522f75b2b1b0ecda8343c35a52c53b
[INFO] running `"docker" "start" "-a" "252b51d468bca0328845acbe48480b728b522f75b2b1b0ecda8343c35a52c53b"`
[INFO] [stderr]    Compiling problem_map_generator v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let mut neighbours = get_neighbours(&leaves, &leave);
[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 0.77s
[INFO] running `"docker" "inspect" "252b51d468bca0328845acbe48480b728b522f75b2b1b0ecda8343c35a52c53b"`
[INFO] running `"docker" "rm" "-f" "252b51d468bca0328845acbe48480b728b522f75b2b1b0ecda8343c35a52c53b"`
[INFO] [stdout] 252b51d468bca0328845acbe48480b728b522f75b2b1b0ecda8343c35a52c53b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/marcbreitung/problem-map-generator-rust:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 9b8dd5f05e08a19cb9b0f2a43bd39dea09b085bb34f88df5240394c438f6ac7f
[INFO] running `"docker" "start" "-a" "9b8dd5f05e08a19cb9b0f2a43bd39dea09b085bb34f88df5240394c438f6ac7f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/problem_map_generator-a2a879ab5f7d9bb5
[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" "9b8dd5f05e08a19cb9b0f2a43bd39dea09b085bb34f88df5240394c438f6ac7f"`
[INFO] running `"docker" "rm" "-f" "9b8dd5f05e08a19cb9b0f2a43bd39dea09b085bb34f88df5240394c438f6ac7f"`
[INFO] [stdout] 9b8dd5f05e08a19cb9b0f2a43bd39dea09b085bb34f88df5240394c438f6ac7f