Dec 17 13:42:02.433 INFO checking thomwiggers/decoder against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 13:42:02.433 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/thomwiggers/decoder:/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 17 13:42:02.900 INFO [stdout] 1f8d8f22fdbee26f54e77054796ea8cd423c94e1284dc5eadcfbb71941bb8519
Dec 17 13:42:02.902 INFO running `"docker" "start" "-a" "1f8d8f22fdbee26f54e77054796ea8cd423c94e1284dc5eadcfbb71941bb8519"`
Dec 17 13:42:04.824 INFO [stderr]     Checking zero_one v0.1.0 (/opt/crater/workdir/zero_one)
Dec 17 13:42:05.144 INFO [stderr]     Checking bit_vector v0.1.0 (/opt/crater/workdir/bit_vector)
Dec 17 13:42:05.564 INFO [stderr]     Checking matrix v0.1.0 (/opt/crater/workdir/matrix)
Dec 17 13:42:06.884 INFO [stderr]     Checking decoder v0.1.0 (/opt/crater/workdir)
Dec 17 13:42:07.756 INFO [stderr] warning: unused arithmetic operation that must be used
Dec 17 13:42:07.756 INFO [stderr]    --> matrix/src/vector.rs:240:9
Dec 17 13:42:07.756 INFO [stderr]     |
Dec 17 13:42:07.756 INFO [stderr] 240 |         &Vector::from_vec(vec![0]) + &Vector::from_vec(vec![0, 1]);
Dec 17 13:42:07.756 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 13:42:07.756 INFO [stderr]     |
Dec 17 13:42:07.756 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 17 13:42:07.756 INFO [stderr] 
Dec 17 13:42:07.756 INFO [stderr] warning: unused arithmetic operation that must be used
Dec 17 13:42:07.756 INFO [stderr]    --> matrix/src/vector.rs:246:9
Dec 17 13:42:07.756 INFO [stderr]     |
Dec 17 13:42:07.756 INFO [stderr] 246 |         &Vector::from_vec(vec![0]) - &Vector::from_vec(vec![0, 1]);
Dec 17 13:42:07.756 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 13:42:07.756 INFO [stderr] 
Dec 17 13:42:07.759 INFO [stderr] warning: unused arithmetic operation that must be used
Dec 17 13:42:07.759 INFO [stderr]    --> matrix/src/matrix.rs:471:9
Dec 17 13:42:07.759 INFO [stderr]     |
Dec 17 13:42:07.759 INFO [stderr] 471 |         m1 + m2;
Dec 17 13:42:07.759 INFO [stderr]     |         ^^^^^^^
Dec 17 13:42:07.759 INFO [stderr] 
Dec 17 13:42:07.759 INFO [stderr] warning: unused arithmetic operation that must be used
Dec 17 13:42:07.759 INFO [stderr]    --> matrix/src/matrix.rs:479:9
Dec 17 13:42:07.759 INFO [stderr]     |
Dec 17 13:42:07.759 INFO [stderr] 479 |         m1 + m2;
Dec 17 13:42:07.759 INFO [stderr]     |         ^^^^^^^
Dec 17 13:42:07.759 INFO [stderr] 
Dec 17 13:42:07.812 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.06s
Dec 17 13:42:08.514 INFO running `"docker" "inspect" "1f8d8f22fdbee26f54e77054796ea8cd423c94e1284dc5eadcfbb71941bb8519"`
Dec 17 13:42:08.834 INFO running `"docker" "rm" "-f" "1f8d8f22fdbee26f54e77054796ea8cd423c94e1284dc5eadcfbb71941bb8519"`
Dec 17 13:42:09.168 INFO [stdout] 1f8d8f22fdbee26f54e77054796ea8cd423c94e1284dc5eadcfbb71941bb8519