[INFO] updating cached repository seeba8/rustsweeper
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/seeba8/rustsweeper
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/seeba8/rustsweeper" "work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/seeba8/rustsweeper"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/seeba8/rustsweeper'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/seeba8/rustsweeper" "work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/seeba8/rustsweeper"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/seeba8/rustsweeper'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 26af1322ebebf64a2e75e056edaf4161134e0864
[INFO] sha for GitHub repo seeba8/rustsweeper: 26af1322ebebf64a2e75e056edaf4161134e0864
[INFO] validating manifest of seeba8/rustsweeper on toolchain master#6ecad338381cc3b8d56e2df22e5971a598eddd6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of seeba8/rustsweeper on toolchain try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing seeba8/rustsweeper
[INFO] finished frobbing seeba8/rustsweeper
[INFO] frobbed toml for seeba8/rustsweeper written to work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/seeba8/rustsweeper/Cargo.toml
[INFO] started frobbing seeba8/rustsweeper
[INFO] finished frobbing seeba8/rustsweeper
[INFO] frobbed toml for seeba8/rustsweeper written to work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/seeba8/rustsweeper/Cargo.toml
[INFO] crate seeba8/rustsweeper has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking seeba8/rustsweeper against try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f for pr-57501
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57501/worker-1/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/seeba8/rustsweeper:/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=forbid" "-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" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f8b88e0841c7b7f67a79bb1114a1c3d8da6dbeabceb75981f343be1a8066c09e
[INFO] running `"docker" "start" "-a" "f8b88e0841c7b7f67a79bb1114a1c3d8da6dbeabceb75981f343be1a8066c09e"`
[INFO] [stderr]     Checking rustsweeper v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:61:13
[INFO] [stderr]    |
[INFO] [stderr] 61 |         let mut state = [[FieldState::None; 9]; 9];
[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/main.rs:61:13
[INFO] [stderr]    |
[INFO] [stderr] 61 |         let mut state = [[FieldState::None; 9]; 9];
[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 0.63s
[INFO] running `"docker" "inspect" "f8b88e0841c7b7f67a79bb1114a1c3d8da6dbeabceb75981f343be1a8066c09e"`
[INFO] running `"docker" "rm" "-f" "f8b88e0841c7b7f67a79bb1114a1c3d8da6dbeabceb75981f343be1a8066c09e"`
[INFO] [stdout] f8b88e0841c7b7f67a79bb1114a1c3d8da6dbeabceb75981f343be1a8066c09e