[INFO] updating cached repository TomLingham/zaity
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/TomLingham/zaity
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/TomLingham/zaity" "work/ex/beta-1.38-1/sources/1.37.0/gh/TomLingham/zaity"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/TomLingham/zaity'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/TomLingham/zaity" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TomLingham/zaity"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TomLingham/zaity'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3e6d76266e1a25f4f077ea6c58b227d0732ac0b5
[INFO] sha for GitHub repo TomLingham/zaity: 3e6d76266e1a25f4f077ea6c58b227d0732ac0b5
[INFO] validating manifest of TomLingham/zaity 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 TomLingham/zaity 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 TomLingham/zaity
[INFO] finished frobbing TomLingham/zaity
[INFO] frobbed toml for TomLingham/zaity written to work/ex/beta-1.38-1/sources/1.37.0/gh/TomLingham/zaity/Cargo.toml
[INFO] started frobbing TomLingham/zaity
[INFO] finished frobbing TomLingham/zaity
[INFO] frobbed toml for TomLingham/zaity written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TomLingham/zaity/Cargo.toml
[INFO] crate TomLingham/zaity 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 TomLingham/zaity 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/TomLingham/zaity:/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] 85aef4c67f2d7cdb53de1d60c59db25b5bb9fc16af66520c2579157e767aa920
[INFO] running `"docker" "start" "-a" "85aef4c67f2d7cdb53de1d60c59db25b5bb9fc16af66520c2579157e767aa920"`
[INFO] [stderr]    Compiling serde v1.0.7
[INFO] [stderr]    Compiling serde_json v1.0.2
[INFO] [stderr]    Compiling zaity v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `cpu_json`
[INFO] [stderr]   --> src/main.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let cpu_json: Value = serde_json::from_str(&json_str).unwrap();
[INFO] [stderr]    |         ^^^^^^^^ help: consider prefixing with an underscore: `_cpu_json`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     file.read_to_end(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.63s
[INFO] running `"docker" "inspect" "85aef4c67f2d7cdb53de1d60c59db25b5bb9fc16af66520c2579157e767aa920"`
[INFO] running `"docker" "rm" "-f" "85aef4c67f2d7cdb53de1d60c59db25b5bb9fc16af66520c2579157e767aa920"`
[INFO] [stdout] 85aef4c67f2d7cdb53de1d60c59db25b5bb9fc16af66520c2579157e767aa920
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/TomLingham/zaity:/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] 8202ffd59a084e94a43ec9f845ae6e24f79c5518383eab707b91326ebbbca1d8
[INFO] running `"docker" "start" "-a" "8202ffd59a084e94a43ec9f845ae6e24f79c5518383eab707b91326ebbbca1d8"`
[INFO] [stderr]    Compiling zaity v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `cpu_json`
[INFO] [stderr]   --> src/main.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let cpu_json: Value = serde_json::from_str(&json_str).unwrap();
[INFO] [stderr]    |         ^^^^^^^^ help: consider prefixing with an underscore: `_cpu_json`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     file.read_to_end(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "8202ffd59a084e94a43ec9f845ae6e24f79c5518383eab707b91326ebbbca1d8"`
[INFO] running `"docker" "rm" "-f" "8202ffd59a084e94a43ec9f845ae6e24f79c5518383eab707b91326ebbbca1d8"`
[INFO] [stdout] 8202ffd59a084e94a43ec9f845ae6e24f79c5518383eab707b91326ebbbca1d8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/TomLingham/zaity:/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] cf5ea3c54fd8298f8d6e531c66920c4b3baa03b9e4c9b3aa40ed8837147f3c7c
[INFO] running `"docker" "start" "-a" "cf5ea3c54fd8298f8d6e531c66920c4b3baa03b9e4c9b3aa40ed8837147f3c7c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/zaity-62d7e16fb455d7e5
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "cf5ea3c54fd8298f8d6e531c66920c4b3baa03b9e4c9b3aa40ed8837147f3c7c"`
[INFO] running `"docker" "rm" "-f" "cf5ea3c54fd8298f8d6e531c66920c4b3baa03b9e4c9b3aa40ed8837147f3c7c"`
[INFO] [stdout] cf5ea3c54fd8298f8d6e531c66920c4b3baa03b9e4c9b3aa40ed8837147f3c7c