[INFO] updating cached repository Nobuyuki-Tokuchi/cent_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Nobuyuki-Tokuchi/cent_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Nobuyuki-Tokuchi/cent_rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/Nobuyuki-Tokuchi/cent_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Nobuyuki-Tokuchi/cent_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Nobuyuki-Tokuchi/cent_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nobuyuki-Tokuchi/cent_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nobuyuki-Tokuchi/cent_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 45872c159b0064bda839464ee4f63fd66b839767
[INFO] sha for GitHub repo Nobuyuki-Tokuchi/cent_rust: 45872c159b0064bda839464ee4f63fd66b839767
[INFO] validating manifest of Nobuyuki-Tokuchi/cent_rust 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 Nobuyuki-Tokuchi/cent_rust 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 Nobuyuki-Tokuchi/cent_rust
[INFO] finished frobbing Nobuyuki-Tokuchi/cent_rust
[INFO] frobbed toml for Nobuyuki-Tokuchi/cent_rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/Nobuyuki-Tokuchi/cent_rust/Cargo.toml
[INFO] started frobbing Nobuyuki-Tokuchi/cent_rust
[INFO] finished frobbing Nobuyuki-Tokuchi/cent_rust
[INFO] frobbed toml for Nobuyuki-Tokuchi/cent_rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nobuyuki-Tokuchi/cent_rust/Cargo.toml
[INFO] crate Nobuyuki-Tokuchi/cent_rust 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing Nobuyuki-Tokuchi/cent_rust 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Nobuyuki-Tokuchi/cent_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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 7cd3d744b062db0c516672cfa455b42d99606cbbca73d5e6715938d1b6e6c16a
[INFO] running `"docker" "start" "-a" "7cd3d744b062db0c516672cfa455b42d99606cbbca73d5e6715938d1b6e6c16a"`
[INFO] [stderr]    Compiling cent v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:165:17
[INFO] [stderr]     |
[INFO] [stderr] 165 |             let mut count = state.label_count.get_mut(operation.as_str()).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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:187:17
[INFO] [stderr]     |
[INFO] [stderr] 187 |             let mut count = state.label_count.get_mut(operation.as_str()).unwrap();
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:227:17
[INFO] [stderr]     |
[INFO] [stderr] 227 |             let mut count = state.label_count.get_mut(operation.as_str()).unwrap();
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.99s
[INFO] running `"docker" "inspect" "7cd3d744b062db0c516672cfa455b42d99606cbbca73d5e6715938d1b6e6c16a"`
[INFO] running `"docker" "rm" "-f" "7cd3d744b062db0c516672cfa455b42d99606cbbca73d5e6715938d1b6e6c16a"`
[INFO] [stdout] 7cd3d744b062db0c516672cfa455b42d99606cbbca73d5e6715938d1b6e6c16a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Nobuyuki-Tokuchi/cent_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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] f5c05a96d82f681b8b359f39a05f2446032bb4e84e91d03cc7764f9773249a68
[INFO] running `"docker" "start" "-a" "f5c05a96d82f681b8b359f39a05f2446032bb4e84e91d03cc7764f9773249a68"`
[INFO] [stderr]    Compiling cent v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:165:17
[INFO] [stderr]     |
[INFO] [stderr] 165 |             let mut count = state.label_count.get_mut(operation.as_str()).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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:187:17
[INFO] [stderr]     |
[INFO] [stderr] 187 |             let mut count = state.label_count.get_mut(operation.as_str()).unwrap();
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/cent/sh2003lk.rs:227:17
[INFO] [stderr]     |
[INFO] [stderr] 227 |             let mut count = state.label_count.get_mut(operation.as_str()).unwrap();
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `"docker" "inspect" "f5c05a96d82f681b8b359f39a05f2446032bb4e84e91d03cc7764f9773249a68"`
[INFO] running `"docker" "rm" "-f" "f5c05a96d82f681b8b359f39a05f2446032bb4e84e91d03cc7764f9773249a68"`
[INFO] [stdout] f5c05a96d82f681b8b359f39a05f2446032bb4e84e91d03cc7764f9773249a68
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Nobuyuki-Tokuchi/cent_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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 64d01d8526cb2fc7595c1da330f0db4f7a1408bf76ff4ab8a731af752c4a9baf
[INFO] running `"docker" "start" "-a" "64d01d8526cb2fc7595c1da330f0db4f7a1408bf76ff4ab8a731af752c4a9baf"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cent-8361023ee79f12ba
[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" "64d01d8526cb2fc7595c1da330f0db4f7a1408bf76ff4ab8a731af752c4a9baf"`
[INFO] running `"docker" "rm" "-f" "64d01d8526cb2fc7595c1da330f0db4f7a1408bf76ff4ab8a731af752c4a9baf"`
[INFO] [stdout] 64d01d8526cb2fc7595c1da330f0db4f7a1408bf76ff4ab8a731af752c4a9baf