Dec 11 11:50:31.776 INFO checking pierrechevalier83/2048-rs against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 11:50:31.776 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 11 11:50:32.088 INFO [stdout] a760e6719d7c162d81415ffd23c2389e3ec4098809985ed967e7e8aa89946c59
Dec 11 11:50:32.090 INFO running `"docker" "start" "-a" "a760e6719d7c162d81415ffd23c2389e3ec4098809985ed967e7e8aa89946c59"`
Dec 11 11:50:33.735 INFO [stderr] usermod: no changes
Dec 11 11:50:33.868 INFO [stderr]     Checking termion v1.2.0
Dec 11 11:50:33.868 INFO [stderr]     Checking num-complex v0.1.36
Dec 11 11:50:33.868 INFO [stderr]     Checking matrix_display v0.3.0
Dec 11 11:50:33.868 INFO [stderr]     Checking num-bigint v0.1.36
Dec 11 11:50:36.376 INFO [stderr]     Checking num-rational v0.1.36
Dec 11 11:50:36.948 INFO [stderr]     Checking num v0.1.37
Dec 11 11:50:37.320 INFO [stderr]     Checking game-2048 v0.5.1 (/source)
Dec 11 11:50:37.952 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 11 11:50:37.952 INFO [stderr]   --> src/game.rs:69:9
Dec 11 11:50:37.952 INFO [stderr]    |
Dec 11 11:50:37.952 INFO [stderr] 69 | /         self.data
Dec 11 11:50:37.952 INFO [stderr] 70 | |             .chunks_mut(4)
Dec 11 11:50:37.952 INFO [stderr] 71 | |             .map(|row| {
Dec 11 11:50:37.952 INFO [stderr] 72 | |                 let (new_row, new_score) = match dir {
Dec 11 11:50:37.952 INFO [stderr] ...  |
Dec 11 11:50:37.952 INFO [stderr] 87 | |             })
Dec 11 11:50:37.952 INFO [stderr] 88 | |             .collect::<Vec<_>>();
Dec 11 11:50:37.952 INFO [stderr]    | |_________________________________^
Dec 11 11:50:37.952 INFO [stderr]    |
Dec 11 11:50:37.952 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 11:50:37.952 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 11 11:50:37.952 INFO [stderr] 
Dec 11 11:50:38.120 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 11 11:50:38.120 INFO [stderr]   --> src/game.rs:69:9
Dec 11 11:50:38.120 INFO [stderr]    |
Dec 11 11:50:38.120 INFO [stderr] 69 | /         self.data
Dec 11 11:50:38.120 INFO [stderr] 70 | |             .chunks_mut(4)
Dec 11 11:50:38.120 INFO [stderr] 71 | |             .map(|row| {
Dec 11 11:50:38.120 INFO [stderr] 72 | |                 let (new_row, new_score) = match dir {
Dec 11 11:50:38.120 INFO [stderr] ...  |
Dec 11 11:50:38.120 INFO [stderr] 87 | |             })
Dec 11 11:50:38.120 INFO [stderr] 88 | |             .collect::<Vec<_>>();
Dec 11 11:50:38.120 INFO [stderr]    | |_________________________________^
Dec 11 11:50:38.120 INFO [stderr]    |
Dec 11 11:50:38.120 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 11:50:38.120 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 11 11:50:38.120 INFO [stderr] 
Dec 11 11:50:38.138 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.37s
Dec 11 11:50:38.139 INFO [stderr] su: No module specific data is present
Dec 11 11:50:38.542 INFO running `"docker" "inspect" "a760e6719d7c162d81415ffd23c2389e3ec4098809985ed967e7e8aa89946c59"`
Dec 11 11:50:38.761 INFO running `"docker" "rm" "-f" "a760e6719d7c162d81415ffd23c2389e3ec4098809985ed967e7e8aa89946c59"`
Dec 11 11:50:38.918 INFO [stdout] a760e6719d7c162d81415ffd23c2389e3ec4098809985ed967e7e8aa89946c59