Dec 18 05:01:32.771 INFO checking VaclavStebra/rust-book-references-and-borrowing against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 05:01:32.771 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/VaclavStebra/rust-book-references-and-borrowing:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 05:01:33.264 INFO [stdout] a4e628f0c2b63e6e823ecd87d588c3c21afe8f53ae14776d3cbc605f41e6056c
Dec 18 05:01:33.272 INFO running `"docker" "start" "-a" "a4e628f0c2b63e6e823ecd87d588c3c21afe8f53ae14776d3cbc605f41e6056c"`
Dec 18 05:01:34.827 INFO [stderr]     Checking rust-book-references-and-borrowing v0.1.0 (/opt/crater/workdir)
Dec 18 05:01:35.202 INFO [stderr] warning: unused variable: `r1`
Dec 18 05:01:35.202 INFO [stderr]   --> src/main.rs:20:9
Dec 18 05:01:35.202 INFO [stderr]    |
Dec 18 05:01:35.202 INFO [stderr] 20 |     let r1 = &mut s2;
Dec 18 05:01:35.202 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 18 05:01:35.202 INFO [stderr]    |
Dec 18 05:01:35.202 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 05:01:35.202 INFO [stderr] 
Dec 18 05:01:35.208 INFO [stderr] warning: unused variable: `r1`
Dec 18 05:01:35.208 INFO [stderr]   --> src/main.rs:20:9
Dec 18 05:01:35.208 INFO [stderr]    |
Dec 18 05:01:35.208 INFO [stderr] 20 |     let r1 = &mut s2;
Dec 18 05:01:35.208 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 18 05:01:35.208 INFO [stderr]    |
Dec 18 05:01:35.208 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 05:01:35.208 INFO [stderr] 
Dec 18 05:01:35.240 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
Dec 18 05:01:35.874 INFO running `"docker" "inspect" "a4e628f0c2b63e6e823ecd87d588c3c21afe8f53ae14776d3cbc605f41e6056c"`
Dec 18 05:01:36.198 INFO running `"docker" "rm" "-f" "a4e628f0c2b63e6e823ecd87d588c3c21afe8f53ae14776d3cbc605f41e6056c"`
Dec 18 05:01:36.446 INFO [stdout] a4e628f0c2b63e6e823ecd87d588c3c21afe8f53ae14776d3cbc605f41e6056c