Nov 27 22:48:14.264 INFO checking pierrechevalier83/2048-rs against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 27 22:48:14.264 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-7/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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"`
Nov 27 22:48:14.738 INFO [stdout] 44043d5aa2038dbb76e1f62d7e4344186a64e0572ecf1ee7a381ccfe653449fc
Nov 27 22:48:14.742 INFO running `"docker" "start" "-a" "44043d5aa2038dbb76e1f62d7e4344186a64e0572ecf1ee7a381ccfe653449fc"`
Nov 27 22:48:15.940 INFO [stderr] usermod: no changes
Nov 27 22:48:16.128 INFO [stderr]     Checking termion v1.2.0
Nov 27 22:48:16.128 INFO [stderr]     Checking matrix_display v0.3.0
Nov 27 22:48:16.128 INFO [stderr]     Checking num-bigint v0.1.36
Nov 27 22:48:17.951 INFO [stderr]     Checking num-rational v0.1.36
Nov 27 22:48:18.511 INFO [stderr]     Checking num v0.1.37
Nov 27 22:48:18.848 INFO [stderr]     Checking game-2048 v0.5.1 (/source)
Nov 27 22:48:19.417 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Nov 27 22:48:19.418 INFO [stderr]   --> src/game.rs:69:9
Nov 27 22:48:19.418 INFO [stderr]    |
Nov 27 22:48:19.418 INFO [stderr] 69 | /         self.data
Nov 27 22:48:19.424 INFO [stderr] 70 | |             .chunks_mut(4)
Nov 27 22:48:19.424 INFO [stderr] 71 | |             .map(|row| {
Nov 27 22:48:19.424 INFO [stderr] 72 | |                 let (new_row, new_score) = match dir {
Nov 27 22:48:19.424 INFO [stderr] ...  |
Nov 27 22:48:19.424 INFO [stderr] 87 | |             })
Nov 27 22:48:19.424 INFO [stderr] 88 | |             .collect::<Vec<_>>();
Nov 27 22:48:19.424 INFO [stderr]    | |_________________________________^
Nov 27 22:48:19.424 INFO [stderr]    |
Nov 27 22:48:19.424 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 27 22:48:19.424 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Nov 27 22:48:19.424 INFO [stderr] 
Nov 27 22:48:19.739 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Nov 27 22:48:19.739 INFO [stderr]   --> src/game.rs:69:9
Nov 27 22:48:19.739 INFO [stderr]    |
Nov 27 22:48:19.739 INFO [stderr] 69 | /         self.data
Nov 27 22:48:19.739 INFO [stderr] 70 | |             .chunks_mut(4)
Nov 27 22:48:19.739 INFO [stderr] 71 | |             .map(|row| {
Nov 27 22:48:19.739 INFO [stderr] 72 | |                 let (new_row, new_score) = match dir {
Nov 27 22:48:19.739 INFO [stderr] ...  |
Nov 27 22:48:19.739 INFO [stderr] 87 | |             })
Nov 27 22:48:19.739 INFO [stderr] 88 | |             .collect::<Vec<_>>();
Nov 27 22:48:19.739 INFO [stderr]    | |_________________________________^
Nov 27 22:48:19.739 INFO [stderr]    |
Nov 27 22:48:19.740 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 27 22:48:19.740 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Nov 27 22:48:19.740 INFO [stderr] 
Nov 27 22:48:19.773 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.80s
Nov 27 22:48:19.781 INFO [stderr] su: No module specific data is present
Nov 27 22:48:20.299 INFO running `"docker" "inspect" "44043d5aa2038dbb76e1f62d7e4344186a64e0572ecf1ee7a381ccfe653449fc"`
Nov 27 22:48:20.574 INFO running `"docker" "rm" "-f" "44043d5aa2038dbb76e1f62d7e4344186a64e0572ecf1ee7a381ccfe653449fc"`
Nov 27 22:48:20.892 INFO [stdout] 44043d5aa2038dbb76e1f62d7e4344186a64e0572ecf1ee7a381ccfe653449fc