[INFO] updating cached repository RustExamples/understand_ownership
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/RustExamples/understand_ownership
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/RustExamples/understand_ownership" "work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/RustExamples/understand_ownership"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/RustExamples/understand_ownership'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/RustExamples/understand_ownership" "work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/RustExamples/understand_ownership"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/RustExamples/understand_ownership'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e129a09715d80aababea59e9878dec5062aa98b6
[INFO] sha for GitHub repo RustExamples/understand_ownership: e129a09715d80aababea59e9878dec5062aa98b6
[INFO] validating manifest of RustExamples/understand_ownership 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 RustExamples/understand_ownership 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 RustExamples/understand_ownership
[INFO] finished frobbing RustExamples/understand_ownership
[INFO] frobbed toml for RustExamples/understand_ownership written to work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/RustExamples/understand_ownership/Cargo.toml
[INFO] started frobbing RustExamples/understand_ownership
[INFO] finished frobbing RustExamples/understand_ownership
[INFO] frobbed toml for RustExamples/understand_ownership written to work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/RustExamples/understand_ownership/Cargo.toml
[INFO] crate RustExamples/understand_ownership 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 RustExamples/understand_ownership against master#6ecad338381cc3b8d56e2df22e5971a598eddd6c for pr-57501
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57501/worker-7/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/RustExamples/understand_ownership:/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" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e30b64722db14e66dfdc4a2cd3809f91d3cda46b8c9e065215f2715656645f54
[INFO] running `"docker" "start" "-a" "e30b64722db14e66dfdc4a2cd3809f91d3cda46b8c9e065215f2715656645f54"`
[INFO] [stderr]     Checking understand_ownership v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let word = first_word(&s);
[INFO] [stderr]   |         ^^^^ help: consider using `_word` instead
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let word = first_word(&s[..5]);
[INFO] [stderr]   |         ^^^^ help: consider using `_word` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let word = first_word(literal);
[INFO] [stderr]   |         ^^^^ help: consider using `_word` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let word = first_word(&literal[..5]);
[INFO] [stderr]   |         ^^^^ help: consider using `_word` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let word = first_word(&s);
[INFO] [stderr]   |         ^^^^ help: consider using `_word` instead
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let word = first_word(&s[..5]);
[INFO] [stderr]   |         ^^^^ help: consider using `_word` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let word = first_word(literal);
[INFO] [stderr]   |         ^^^^ help: consider using `_word` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let word = first_word(&literal[..5]);
[INFO] [stderr]   |         ^^^^ help: consider using `_word` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `"docker" "inspect" "e30b64722db14e66dfdc4a2cd3809f91d3cda46b8c9e065215f2715656645f54"`
[INFO] running `"docker" "rm" "-f" "e30b64722db14e66dfdc4a2cd3809f91d3cda46b8c9e065215f2715656645f54"`
[INFO] [stdout] e30b64722db14e66dfdc4a2cd3809f91d3cda46b8c9e065215f2715656645f54