Oct 31 23:11:53.141 INFO checking pierrechevalier83/2048-rs against try#d7816399d50d407bbce1efe9dbadf8faaaf568fc for pr-55538
Oct 31 23:11:53.141 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-3/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-55538/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/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 +d7816399d50d407bbce1efe9dbadf8faaaf568fc-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"`
Oct 31 23:11:53.724 INFO blam! 074320f0191172b9368d7f61d8031404f2dc66955a5ec6e14f443aac37b85ea1
Oct 31 23:11:53.725 INFO running `"docker" "start" "-a" "074320f0191172b9368d7f61d8031404f2dc66955a5ec6e14f443aac37b85ea1"`
Oct 31 23:11:56.260 INFO kablam! usermod: no changes
Oct 31 23:11:56.430 INFO kablam!     Checking termion v1.2.0
Oct 31 23:11:56.436 INFO kablam!     Checking num-complex v0.1.36
Oct 31 23:11:56.452 INFO kablam!     Checking matrix_display v0.3.0
Oct 31 23:11:56.468 INFO kablam!     Checking num-bigint v0.1.36
Oct 31 23:11:59.266 INFO kablam!     Checking num-rational v0.1.36
Oct 31 23:11:59.933 INFO kablam!     Checking num v0.1.37
Oct 31 23:12:00.275 INFO kablam!     Checking game-2048 v0.5.1 (/source)
Oct 31 23:12:01.156 INFO kablam! warning: unused return value of `std::iter::Iterator::collect` that must be used
Oct 31 23:12:01.157 INFO kablam!   --> src/game.rs:69:9
Oct 31 23:12:01.158 INFO kablam!    |
Oct 31 23:12:01.159 INFO kablam! 69 | /         self.data
Oct 31 23:12:01.160 INFO kablam! 70 | |             .chunks_mut(4)
Oct 31 23:12:01.160 INFO kablam! 71 | |             .map(|row| {
Oct 31 23:12:01.161 INFO kablam! 72 | |                 let (new_row, new_score) = match dir {
Oct 31 23:12:01.161 INFO kablam! ...  |
Oct 31 23:12:01.161 INFO kablam! 87 | |             })
Oct 31 23:12:01.161 INFO kablam! 88 | |             .collect::<Vec<_>>();
Oct 31 23:12:01.161 INFO kablam!    | |_________________________________^
Oct 31 23:12:01.161 INFO kablam!    |
Oct 31 23:12:01.161 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Oct 31 23:12:01.162 INFO kablam!    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Oct 31 23:12:01.162 INFO kablam! 
Oct 31 23:12:01.345 INFO kablam! warning: unused return value of `std::iter::Iterator::collect` that must be used
Oct 31 23:12:01.345 INFO kablam!   --> src/game.rs:69:9
Oct 31 23:12:01.345 INFO kablam!    |
Oct 31 23:12:01.345 INFO kablam! 69 | /         self.data
Oct 31 23:12:01.345 INFO kablam! 70 | |             .chunks_mut(4)
Oct 31 23:12:01.345 INFO kablam! 71 | |             .map(|row| {
Oct 31 23:12:01.345 INFO kablam! 72 | |                 let (new_row, new_score) = match dir {
Oct 31 23:12:01.345 INFO kablam! ...  |
Oct 31 23:12:01.345 INFO kablam! 87 | |             })
Oct 31 23:12:01.345 INFO kablam! 88 | |             .collect::<Vec<_>>();
Oct 31 23:12:01.360 INFO kablam!    | |_________________________________^
Oct 31 23:12:01.360 INFO kablam!    |
Oct 31 23:12:01.360 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Oct 31 23:12:01.360 INFO kablam!    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Oct 31 23:12:01.360 INFO kablam! 
Oct 31 23:12:01.404 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.10s
Oct 31 23:12:01.423 INFO kablam! su: No module specific data is present
Oct 31 23:12:02.541 INFO running `"docker" "rm" "-f" "074320f0191172b9368d7f61d8031404f2dc66955a5ec6e14f443aac37b85ea1"`
Oct 31 23:12:02.941 INFO blam! 074320f0191172b9368d7f61d8031404f2dc66955a5ec6e14f443aac37b85ea1