[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-1.37-6/sources/1.36.0/gh/LegitBaboulinet/rust-cheatsheet"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/LegitBaboulinet/rust-cheatsheet'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/LegitBaboulinet/rust-cheatsheet" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/LegitBaboulinet/rust-cheatsheet"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of LegitBaboulinet/rust-cheatsheet 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 LegitBaboulinet/rust-cheatsheet
[INFO] finished frobbing LegitBaboulinet/rust-cheatsheet
[INFO] frobbed toml for LegitBaboulinet/rust-cheatsheet written to work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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[INFO] the lockfile is outdated, regenerating it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" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing LegitBaboulinet/rust-cheatsheet 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-4/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/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] e93779d6f482c68f839be530b727d2ad2a7073ff3436b3a703b3c51947c2d1e4
[INFO] running `"docker" "start" "-a" "e93779d6f482c68f839be530b727d2ad2a7073ff3436b3a703b3c51947c2d1e4"`
[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 0.93s
[INFO] running `"docker" "inspect" "e93779d6f482c68f839be530b727d2ad2a7073ff3436b3a703b3c51947c2d1e4"`
[INFO] running `"docker" "rm" "-f" "e93779d6f482c68f839be530b727d2ad2a7073ff3436b3a703b3c51947c2d1e4"`
[INFO] [stdout] e93779d6f482c68f839be530b727d2ad2a7073ff3436b3a703b3c51947c2d1e4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 05df4efefa7aa93554d6d59ef12da946dff8b1ce72092cef22e77deb4d1cb125
[INFO] running `"docker" "start" "-a" "05df4efefa7aa93554d6d59ef12da946dff8b1ce72092cef22e77deb4d1cb125"`
[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 0.86s
[INFO] running `"docker" "inspect" "05df4efefa7aa93554d6d59ef12da946dff8b1ce72092cef22e77deb4d1cb125"`
[INFO] running `"docker" "rm" "-f" "05df4efefa7aa93554d6d59ef12da946dff8b1ce72092cef22e77deb4d1cb125"`
[INFO] [stdout] 05df4efefa7aa93554d6d59ef12da946dff8b1ce72092cef22e77deb4d1cb125
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 6d6912b3087aaa8efc86ba5bc3033b122b3a81e9c97c412b0330ae82530d16ed
[INFO] running `"docker" "start" "-a" "6d6912b3087aaa8efc86ba5bc3033b122b3a81e9c97c412b0330ae82530d16ed"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_cheatsheet-722cbdffa5adb92e
[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" "6d6912b3087aaa8efc86ba5bc3033b122b3a81e9c97c412b0330ae82530d16ed"`
[INFO] running `"docker" "rm" "-f" "6d6912b3087aaa8efc86ba5bc3033b122b3a81e9c97c412b0330ae82530d16ed"`
[INFO] [stdout] 6d6912b3087aaa8efc86ba5bc3033b122b3a81e9c97c412b0330ae82530d16ed