Dec 04 12:24:21.766 INFO checking pierrechevalier83/2048-rs against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 12:24:21.767 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-7/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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 12:24:21.991 INFO [stdout] 3d521cfb4433ca2c770467dfe8bf8501d8d8e7b076a8f1e3741e60d633884415
Dec 04 12:24:21.993 INFO running `"docker" "start" "-a" "3d521cfb4433ca2c770467dfe8bf8501d8d8e7b076a8f1e3741e60d633884415"`
Dec 04 12:24:22.736 INFO [stderr] usermod: no changes
Dec 04 12:24:22.841 INFO [stderr]     Checking termion v1.2.0
Dec 04 12:24:22.842 INFO [stderr]     Checking matrix_display v0.3.0
Dec 04 12:24:22.842 INFO [stderr]     Checking num-bigint v0.1.36
Dec 04 12:24:24.227 INFO [stderr]     Checking num-rational v0.1.36
Dec 04 12:24:24.726 INFO [stderr]     Checking num v0.1.37
Dec 04 12:24:24.901 INFO [stderr]     Checking game-2048 v0.5.1 (/source)
Dec 04 12:24:25.463 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 04 12:24:25.463 INFO [stderr]   --> src/game.rs:69:9
Dec 04 12:24:25.463 INFO [stderr]    |
Dec 04 12:24:25.463 INFO [stderr] 69 | /         self.data
Dec 04 12:24:25.463 INFO [stderr] 70 | |             .chunks_mut(4)
Dec 04 12:24:25.463 INFO [stderr] 71 | |             .map(|row| {
Dec 04 12:24:25.463 INFO [stderr] 72 | |                 let (new_row, new_score) = match dir {
Dec 04 12:24:25.463 INFO [stderr] ...  |
Dec 04 12:24:25.463 INFO [stderr] 87 | |             })
Dec 04 12:24:25.463 INFO [stderr] 88 | |             .collect::<Vec<_>>();
Dec 04 12:24:25.463 INFO [stderr]    | |_________________________________^
Dec 04 12:24:25.463 INFO [stderr]    |
Dec 04 12:24:25.463 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 12:24:25.463 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 04 12:24:25.463 INFO [stderr] 
Dec 04 12:24:25.612 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 04 12:24:25.612 INFO [stderr]   --> src/game.rs:69:9
Dec 04 12:24:25.612 INFO [stderr]    |
Dec 04 12:24:25.612 INFO [stderr] 69 | /         self.data
Dec 04 12:24:25.612 INFO [stderr] 70 | |             .chunks_mut(4)
Dec 04 12:24:25.612 INFO [stderr] 71 | |             .map(|row| {
Dec 04 12:24:25.612 INFO [stderr] 72 | |                 let (new_row, new_score) = match dir {
Dec 04 12:24:25.612 INFO [stderr] ...  |
Dec 04 12:24:25.612 INFO [stderr] 87 | |             })
Dec 04 12:24:25.612 INFO [stderr] 88 | |             .collect::<Vec<_>>();
Dec 04 12:24:25.612 INFO [stderr]    | |_________________________________^
Dec 04 12:24:25.612 INFO [stderr]    |
Dec 04 12:24:25.612 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 12:24:25.612 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 04 12:24:25.612 INFO [stderr] 
Dec 04 12:24:25.626 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.87s
Dec 04 12:24:25.632 INFO [stderr] su: No module specific data is present
Dec 04 12:24:25.908 INFO running `"docker" "inspect" "3d521cfb4433ca2c770467dfe8bf8501d8d8e7b076a8f1e3741e60d633884415"`
Dec 04 12:24:26.000 INFO running `"docker" "rm" "-f" "3d521cfb4433ca2c770467dfe8bf8501d8d8e7b076a8f1e3741e60d633884415"`
Dec 04 12:24:26.135 INFO [stdout] 3d521cfb4433ca2c770467dfe8bf8501d8d8e7b076a8f1e3741e60d633884415