[INFO] updating cached repository LegitBaboulinet/rust-cheatsheet
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/LegitBaboulinet/rust-cheatsheet
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/LegitBaboulinet/rust-cheatsheet" "work/ex/beta-1.38-1/sources/1.37.0/gh/LegitBaboulinet/rust-cheatsheet"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/LegitBaboulinet/rust-cheatsheet'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/LegitBaboulinet/rust-cheatsheet" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LegitBaboulinet/rust-cheatsheet"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LegitBaboulinet/rust-cheatsheet'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 86a181851a96f4c915c28b0d44b5125e7873e3f4
[INFO] sha for GitHub repo LegitBaboulinet/rust-cheatsheet: 86a181851a96f4c915c28b0d44b5125e7873e3f4
[INFO] validating manifest of LegitBaboulinet/rust-cheatsheet 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 LegitBaboulinet/rust-cheatsheet 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 LegitBaboulinet/rust-cheatsheet
[INFO] finished frobbing LegitBaboulinet/rust-cheatsheet
[INFO] frobbed toml for LegitBaboulinet/rust-cheatsheet written to work/ex/beta-1.38-1/sources/1.37.0/gh/LegitBaboulinet/rust-cheatsheet/Cargo.toml
[INFO] started frobbing LegitBaboulinet/rust-cheatsheet
[INFO] finished frobbing LegitBaboulinet/rust-cheatsheet
[INFO] frobbed toml for LegitBaboulinet/rust-cheatsheet written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LegitBaboulinet/rust-cheatsheet/Cargo.toml
[INFO] crate LegitBaboulinet/rust-cheatsheet 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/LegitBaboulinet/rust-cheatsheet/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 LegitBaboulinet/rust-cheatsheet 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/LegitBaboulinet/rust-cheatsheet:/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] 0c5a120d8745de4c17467e1683167e8d69d452abfd4389b4036bbebd8d30cf54
[INFO] running `"docker" "start" "-a" "0c5a120d8745de4c17467e1683167e8d69d452abfd4389b4036bbebd8d30cf54"`
[INFO] [stderr]    Compiling rust-cheatsheet v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/structs.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut p = Person::new("John", "Doe");
[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" "0c5a120d8745de4c17467e1683167e8d69d452abfd4389b4036bbebd8d30cf54"`
[INFO] running `"docker" "rm" "-f" "0c5a120d8745de4c17467e1683167e8d69d452abfd4389b4036bbebd8d30cf54"`
[INFO] [stdout] 0c5a120d8745de4c17467e1683167e8d69d452abfd4389b4036bbebd8d30cf54
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/LegitBaboulinet/rust-cheatsheet:/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] 7fea76c0eb4720bc54b1bc398bcb24b23369ffa5582726f263dcc523f0aa2349
[INFO] running `"docker" "start" "-a" "7fea76c0eb4720bc54b1bc398bcb24b23369ffa5582726f263dcc523f0aa2349"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-cheatsheet v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/structs.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut p = Person::new("John", "Doe");
[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 1.51s
[INFO] running `"docker" "inspect" "7fea76c0eb4720bc54b1bc398bcb24b23369ffa5582726f263dcc523f0aa2349"`
[INFO] running `"docker" "rm" "-f" "7fea76c0eb4720bc54b1bc398bcb24b23369ffa5582726f263dcc523f0aa2349"`
[INFO] [stdout] 7fea76c0eb4720bc54b1bc398bcb24b23369ffa5582726f263dcc523f0aa2349
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/LegitBaboulinet/rust-cheatsheet:/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] 72b5be55fd0912f56e29c1d8038f4febb00372d61c9f5060a2021d52bd89f0b3
[INFO] running `"docker" "start" "-a" "72b5be55fd0912f56e29c1d8038f4febb00372d61c9f5060a2021d52bd89f0b3"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_cheatsheet-76babd2751e20db8
[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" "72b5be55fd0912f56e29c1d8038f4febb00372d61c9f5060a2021d52bd89f0b3"`
[INFO] running `"docker" "rm" "-f" "72b5be55fd0912f56e29c1d8038f4febb00372d61c9f5060a2021d52bd89f0b3"`
[INFO] [stdout] 72b5be55fd0912f56e29c1d8038f4febb00372d61c9f5060a2021d52bd89f0b3