[INFO] updating cached repository wbigger/RustIntro
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/wbigger/RustIntro
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/wbigger/RustIntro" "work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/wbigger/RustIntro"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/wbigger/RustIntro'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/wbigger/RustIntro" "work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/wbigger/RustIntro"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/wbigger/RustIntro'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7e1c039a0b5396dc86b1435860f521e4065dea32
[INFO] sha for GitHub repo wbigger/RustIntro: 7e1c039a0b5396dc86b1435860f521e4065dea32
[INFO] validating manifest of wbigger/RustIntro on toolchain master#e2f221c75932de7a29845c8d6f1f73536ad00c41
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of wbigger/RustIntro on toolchain try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing wbigger/RustIntro
[INFO] finished frobbing wbigger/RustIntro
[INFO] frobbed toml for wbigger/RustIntro written to work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/wbigger/RustIntro/Cargo.toml
[INFO] started frobbing wbigger/RustIntro
[INFO] finished frobbing wbigger/RustIntro
[INFO] frobbed toml for wbigger/RustIntro written to work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/wbigger/RustIntro/Cargo.toml
[INFO] crate wbigger/RustIntro has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking wbigger/RustIntro against master#e2f221c75932de7a29845c8d6f1f73536ad00c41 for pr-57617
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57617/worker-0/master#e2f221c75932de7a29845c8d6f1f73536ad00c41:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/wbigger/RustIntro:/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" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9890479f5699840878fe09818dd4dc11c3021eb4f335bdd49e6f7a56db300787
[INFO] running `"docker" "start" "-a" "9890479f5699840878fe09818dd4dc11c3021eb4f335bdd49e6f7a56db300787"`
[INFO] [stderr]     Checking RustIntro v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `vec`
[INFO] [stderr]  --> src/borrowing.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn user(vec: &Vec<i32>) {
[INFO] [stderr]   |         ^^^ help: consider using `_vec` instead
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vec`
[INFO] [stderr]  --> src/ownership.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn take(vec: Vec<i32>) {
[INFO] [stderr]   |         ^^^ help: consider using `_vec` instead
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vec`
[INFO] [stderr] warning: unused variable: `s1`
[INFO] [stderr]  --> src/lifetime.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let (s1,s2) = line.split_at(prefix.len());
[INFO] [stderr]   |          ^^ help: consider using `_s1` instead
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]  --> src/ownership.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn take(vec: Vec<i32>) {
[INFO] [stderr]   |         ^^^ help: consider using `_vec` instead
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vec`
[INFO] [stderr]  --> src/borrowing.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn user(vec: &Vec<i32>) {
[INFO] [stderr]   |         ^^^ help: consider using `_vec` instead
[INFO] [stderr] warning: unused variable: `s1`
[INFO] [stderr]  --> src/lifetime.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let (s1,s2) = line.split_at(prefix.len());
[INFO] [stderr]   |          ^^ help: consider using `_s1` instead
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `"docker" "inspect" "9890479f5699840878fe09818dd4dc11c3021eb4f335bdd49e6f7a56db300787"`
[INFO] running `"docker" "rm" "-f" "9890479f5699840878fe09818dd4dc11c3021eb4f335bdd49e6f7a56db300787"`
[INFO] [stdout] 9890479f5699840878fe09818dd4dc11c3021eb4f335bdd49e6f7a56db300787