Dec 04 23:37:49.623 INFO checking VaclavStebra/rust-book-references-and-borrowing against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 23:37:49.623 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 23:37:49.812 INFO [stdout] 32636ff5c29d2ab8898a33b31b0c020d13d379ebafab8ed326f11f0db07d58f0
Dec 04 23:37:49.821 INFO running `"docker" "start" "-a" "32636ff5c29d2ab8898a33b31b0c020d13d379ebafab8ed326f11f0db07d58f0"`
Dec 04 23:37:50.468 INFO [stderr] usermod: no changes
Dec 04 23:37:50.500 INFO [stderr]     Checking rust-book-references-and-borrowing v0.1.0 (/source)
Dec 04 23:37:50.851 INFO [stderr] warning: unused variable: `r1`
Dec 04 23:37:50.851 INFO [stderr]   --> src/main.rs:20:9
Dec 04 23:37:50.851 INFO [stderr]    |
Dec 04 23:37:50.851 INFO [stderr] 20 |     let r1 = &mut s2;
Dec 04 23:37:50.851 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 04 23:37:50.851 INFO [stderr]    |
Dec 04 23:37:50.851 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 23:37:50.851 INFO [stderr] 
Dec 04 23:37:50.953 INFO [stderr] warning: unused variable: `r1`
Dec 04 23:37:50.953 INFO [stderr]   --> src/main.rs:20:9
Dec 04 23:37:50.953 INFO [stderr]    |
Dec 04 23:37:50.953 INFO [stderr] 20 |     let r1 = &mut s2;
Dec 04 23:37:50.953 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 04 23:37:50.953 INFO [stderr]    |
Dec 04 23:37:50.953 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 23:37:50.953 INFO [stderr] 
Dec 04 23:37:50.966 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
Dec 04 23:37:50.969 INFO [stderr] su: No module specific data is present
Dec 04 23:37:51.319 INFO running `"docker" "inspect" "32636ff5c29d2ab8898a33b31b0c020d13d379ebafab8ed326f11f0db07d58f0"`
Dec 04 23:37:51.505 INFO running `"docker" "rm" "-f" "32636ff5c29d2ab8898a33b31b0c020d13d379ebafab8ed326f11f0db07d58f0"`
Dec 04 23:37:51.662 INFO [stdout] 32636ff5c29d2ab8898a33b31b0c020d13d379ebafab8ed326f11f0db07d58f0