Nov 28 14:16:39.860 INFO checking Cackbone/2048.rs against master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5 for pr-56074
Nov 28 14:16:39.861 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-5/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56074/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/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 +0b9f19dff1347e29bf4362ab5a8fab84b43023b5-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 28 14:16:40.360 INFO [stdout] 6f99ce76ea35d1a2186df429407b6066f119fe79126b6d21469ce3e5b4f05f57
Nov 28 14:16:40.366 INFO running `"docker" "start" "-a" "6f99ce76ea35d1a2186df429407b6066f119fe79126b6d21469ce3e5b4f05f57"`
Nov 28 14:16:41.940 INFO [stderr] usermod: no changes
Nov 28 14:16:42.048 INFO [stderr]     Checking rust_2048 v0.1.0 (/source)
Nov 28 14:16:43.223 INFO [stderr] warning: value assigned to `grid_bis` is never read
Nov 28 14:16:43.223 INFO [stderr]   --> src/main.rs:18:13
Nov 28 14:16:43.223 INFO [stderr]    |
Nov 28 14:16:43.223 INFO [stderr] 18 |     let mut grid_bis = [[0i8; 4];4];
Nov 28 14:16:43.223 INFO [stderr]    |             ^^^^^^^^
Nov 28 14:16:43.223 INFO [stderr]    |
Nov 28 14:16:43.240 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 28 14:16:43.240 INFO [stderr] 
Nov 28 14:16:43.245 INFO [stderr] warning: variable does not need to be mutable
Nov 28 14:16:43.245 INFO [stderr]   --> src/main.rs:97:28
Nov 28 14:16:43.245 INFO [stderr]    |
Nov 28 14:16:43.245 INFO [stderr] 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4])
Nov 28 14:16:43.245 INFO [stderr]    |                            ----^^^^
Nov 28 14:16:43.245 INFO [stderr]    |                            |
Nov 28 14:16:43.245 INFO [stderr]    |                            help: remove this `mut`
Nov 28 14:16:43.247 INFO [stderr]    |
Nov 28 14:16:43.247 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 28 14:16:43.247 INFO [stderr] 
Nov 28 14:16:43.248 INFO [stderr] warning: variable does not need to be mutable
Nov 28 14:16:43.248 INFO [stderr]    --> src/main.rs:137:13
Nov 28 14:16:43.248 INFO [stderr]     |
Nov 28 14:16:43.248 INFO [stderr] 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4])
Nov 28 14:16:43.248 INFO [stderr]     |             ----^^^^
Nov 28 14:16:43.248 INFO [stderr]     |             |
Nov 28 14:16:43.248 INFO [stderr]     |             help: remove this `mut`
Nov 28 14:16:43.249 INFO [stderr] 
Nov 28 14:16:43.276 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 14:16:43.277 INFO [stderr]   --> src/main.rs:52:13
Nov 28 14:16:43.277 INFO [stderr]    |
Nov 28 14:16:43.277 INFO [stderr] 52 |             Command::new("clear").status();
Nov 28 14:16:43.277 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 14:16:43.277 INFO [stderr] warning: value assigned to `grid_bis` is never read
Nov 28 14:16:43.277 INFO [stderr]   --> src/main.rs:18:13
Nov 28 14:16:43.277 INFO [stderr]    |
Nov 28 14:16:43.277 INFO [stderr] 18 |     let mut grid_bis = [[0i8; 4];4];
Nov 28 14:16:43.277 INFO [stderr]    |             ^^^^^^^^
Nov 28 14:16:43.277 INFO [stderr]    |
Nov 28 14:16:43.277 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 28 14:16:43.277 INFO [stderr] 
Nov 28 14:16:43.277 INFO [stderr]    |
Nov 28 14:16:43.277 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 28 14:16:43.277 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 14:16:43.277 INFO [stderr] 
Nov 28 14:16:43.280 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 14:16:43.280 INFO [stderr]   --> src/main.rs:75:5
Nov 28 14:16:43.280 INFO [stderr]    |
Nov 28 14:16:43.280 INFO [stderr] 75 |     Command::new("clear").status();
Nov 28 14:16:43.280 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 14:16:43.280 INFO [stderr]    |
Nov 28 14:16:43.280 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 14:16:43.280 INFO [stderr] 
Nov 28 14:16:43.297 INFO [stderr] warning: variable does not need to be mutable
Nov 28 14:16:43.297 INFO [stderr]   --> src/main.rs:97:28
Nov 28 14:16:43.297 INFO [stderr]    |
Nov 28 14:16:43.298 INFO [stderr] 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4])
Nov 28 14:16:43.298 INFO [stderr]    |                            ----^^^^
Nov 28 14:16:43.298 INFO [stderr]    |                            |
Nov 28 14:16:43.298 INFO [stderr]    |                            help: remove this `mut`
Nov 28 14:16:43.298 INFO [stderr]    |
Nov 28 14:16:43.298 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 28 14:16:43.298 INFO [stderr] 
Nov 28 14:16:43.304 INFO [stderr] warning: variable does not need to be mutable
Nov 28 14:16:43.304 INFO [stderr]    --> src/main.rs:137:13
Nov 28 14:16:43.305 INFO [stderr]     |
Nov 28 14:16:43.305 INFO [stderr] 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4])
Nov 28 14:16:43.305 INFO [stderr]     |             ----^^^^
Nov 28 14:16:43.305 INFO [stderr]     |             |
Nov 28 14:16:43.305 INFO [stderr]     |             help: remove this `mut`
Nov 28 14:16:43.305 INFO [stderr] 
Nov 28 14:16:43.318 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 14:16:43.318 INFO [stderr]   --> src/main.rs:52:13
Nov 28 14:16:43.318 INFO [stderr]    |
Nov 28 14:16:43.318 INFO [stderr] 52 |             Command::new("clear").status();
Nov 28 14:16:43.318 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 14:16:43.318 INFO [stderr]    |
Nov 28 14:16:43.320 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 28 14:16:43.320 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 14:16:43.321 INFO [stderr] 
Nov 28 14:16:43.321 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 14:16:43.321 INFO [stderr]   --> src/main.rs:75:5
Nov 28 14:16:43.321 INFO [stderr]    |
Nov 28 14:16:43.321 INFO [stderr] 75 |     Command::new("clear").status();
Nov 28 14:16:43.322 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 14:16:43.322 INFO [stderr]    |
Nov 28 14:16:43.322 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 14:16:43.322 INFO [stderr] 
Nov 28 14:16:43.376 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
Nov 28 14:16:43.383 INFO [stderr] su: No module specific data is present
Nov 28 14:16:44.652 INFO running `"docker" "inspect" "6f99ce76ea35d1a2186df429407b6066f119fe79126b6d21469ce3e5b4f05f57"`
Nov 28 14:16:44.914 INFO running `"docker" "rm" "-f" "6f99ce76ea35d1a2186df429407b6066f119fe79126b6d21469ce3e5b4f05f57"`
Nov 28 14:16:45.208 INFO [stdout] 6f99ce76ea35d1a2186df429407b6066f119fe79126b6d21469ce3e5b4f05f57