[INFO] updating cached repository adam-mcdaniel/parkinglot-generator-optimizer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/adam-mcdaniel/parkinglot-generator-optimizer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/adam-mcdaniel/parkinglot-generator-optimizer" "work/ex/beta-1.38-1/sources/1.37.0/gh/adam-mcdaniel/parkinglot-generator-optimizer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/adam-mcdaniel/parkinglot-generator-optimizer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/adam-mcdaniel/parkinglot-generator-optimizer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/adam-mcdaniel/parkinglot-generator-optimizer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/adam-mcdaniel/parkinglot-generator-optimizer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ac4391480658f0bba08eb343db1a6cf963298e59
[INFO] sha for GitHub repo adam-mcdaniel/parkinglot-generator-optimizer: ac4391480658f0bba08eb343db1a6cf963298e59
[INFO] validating manifest of adam-mcdaniel/parkinglot-generator-optimizer on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of adam-mcdaniel/parkinglot-generator-optimizer on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing adam-mcdaniel/parkinglot-generator-optimizer
[INFO] finished frobbing adam-mcdaniel/parkinglot-generator-optimizer
[INFO] frobbed toml for adam-mcdaniel/parkinglot-generator-optimizer written to work/ex/beta-1.38-1/sources/1.37.0/gh/adam-mcdaniel/parkinglot-generator-optimizer/Cargo.toml
[INFO] started frobbing adam-mcdaniel/parkinglot-generator-optimizer
[INFO] finished frobbing adam-mcdaniel/parkinglot-generator-optimizer
[INFO] frobbed toml for adam-mcdaniel/parkinglot-generator-optimizer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/adam-mcdaniel/parkinglot-generator-optimizer/Cargo.toml
[INFO] crate adam-mcdaniel/parkinglot-generator-optimizer already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing adam-mcdaniel/parkinglot-generator-optimizer against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/adam-mcdaniel/parkinglot-generator-optimizer:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] bdc66e948e90e9ef82ad56e0c1479ca0452bcb7355c502bd4a023c21a2f4e0a1
[INFO] running `"docker" "start" "-a" "bdc66e948e90e9ef82ad56e0c1479ca0452bcb7355c502bd4a023c21a2f4e0a1"`
[INFO] [stderr]    Compiling pathfinding v1.0.3
[INFO] [stderr]    Compiling parking v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:79:13
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let mut lot = t.join().unwrap();
[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 4.44s
[INFO] running `"docker" "inspect" "bdc66e948e90e9ef82ad56e0c1479ca0452bcb7355c502bd4a023c21a2f4e0a1"`
[INFO] running `"docker" "rm" "-f" "bdc66e948e90e9ef82ad56e0c1479ca0452bcb7355c502bd4a023c21a2f4e0a1"`
[INFO] [stdout] bdc66e948e90e9ef82ad56e0c1479ca0452bcb7355c502bd4a023c21a2f4e0a1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/adam-mcdaniel/parkinglot-generator-optimizer:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 775193772aa4b3fd9852d6391440cd3d67d9060cbda13226d182d089b0682c14
[INFO] running `"docker" "start" "-a" "775193772aa4b3fd9852d6391440cd3d67d9060cbda13226d182d089b0682c14"`
[INFO] [stderr]    Compiling parking v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:79:13
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let mut lot = t.join().unwrap();
[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 0.81s
[INFO] running `"docker" "inspect" "775193772aa4b3fd9852d6391440cd3d67d9060cbda13226d182d089b0682c14"`
[INFO] running `"docker" "rm" "-f" "775193772aa4b3fd9852d6391440cd3d67d9060cbda13226d182d089b0682c14"`
[INFO] [stdout] 775193772aa4b3fd9852d6391440cd3d67d9060cbda13226d182d089b0682c14
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/adam-mcdaniel/parkinglot-generator-optimizer:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] bbda037d72f0724422eb439c692945f532088103a0bf78a0d317a57e631975f6
[INFO] running `"docker" "start" "-a" "bbda037d72f0724422eb439c692945f532088103a0bf78a0d317a57e631975f6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/parking-a8156ea8daee51cf
[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" "bbda037d72f0724422eb439c692945f532088103a0bf78a0d317a57e631975f6"`
[INFO] running `"docker" "rm" "-f" "bbda037d72f0724422eb439c692945f532088103a0bf78a0d317a57e631975f6"`
[INFO] [stdout] bbda037d72f0724422eb439c692945f532088103a0bf78a0d317a57e631975f6