Nov 30 11:46:07.463 INFO checking Cackbone/2048.rs against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 30 11:46:07.463 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-5/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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 30 11:46:07.991 INFO [stdout] 5e768fb3e68f4cc13179e26d5ff44ff5a24f7c85c589a9378540ebae0ba33659
Nov 30 11:46:07.993 INFO running `"docker" "start" "-a" "5e768fb3e68f4cc13179e26d5ff44ff5a24f7c85c589a9378540ebae0ba33659"`
Nov 30 11:46:09.304 INFO [stderr] usermod: no changes
Nov 30 11:46:09.376 INFO [stderr]     Checking rust_2048 v0.1.0 (/source)
Nov 30 11:46:10.724 INFO [stderr] warning: value assigned to `grid_bis` is never read
Nov 30 11:46:10.724 INFO [stderr]   --> src/main.rs:18:13
Nov 30 11:46:10.724 INFO [stderr]    |
Nov 30 11:46:10.724 INFO [stderr] 18 |     let mut grid_bis = [[0i8; 4];4];
Nov 30 11:46:10.724 INFO [stderr]    |             ^^^^^^^^
Nov 30 11:46:10.724 INFO [stderr]    |
Nov 30 11:46:10.724 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 30 11:46:10.724 INFO [stderr] 
Nov 30 11:46:10.748 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:46:10.748 INFO [stderr]   --> src/main.rs:97:28
Nov 30 11:46:10.748 INFO [stderr]    |
Nov 30 11:46:10.748 INFO [stderr] 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4])
Nov 30 11:46:10.748 INFO [stderr]    |                            ----^^^^
Nov 30 11:46:10.748 INFO [stderr]    |                            |
Nov 30 11:46:10.748 INFO [stderr]    |                            help: remove this `mut`
Nov 30 11:46:10.748 INFO [stderr]    |
Nov 30 11:46:10.748 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 30 11:46:10.748 INFO [stderr] 
Nov 30 11:46:10.756 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:46:10.756 INFO [stderr]    --> src/main.rs:137:13
Nov 30 11:46:10.756 INFO [stderr]     |
Nov 30 11:46:10.756 INFO [stderr] 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4])
Nov 30 11:46:10.756 INFO [stderr]     |             ----^^^^
Nov 30 11:46:10.756 INFO [stderr]     |             |
Nov 30 11:46:10.756 INFO [stderr]     |             help: remove this `mut`
Nov 30 11:46:10.756 INFO [stderr] 
Nov 30 11:46:10.778 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 11:46:10.778 INFO [stderr]   --> src/main.rs:52:13
Nov 30 11:46:10.778 INFO [stderr]    |
Nov 30 11:46:10.778 INFO [stderr] 52 |             Command::new("clear").status();
Nov 30 11:46:10.778 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 11:46:10.778 INFO [stderr]    |
Nov 30 11:46:10.778 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 30 11:46:10.778 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 11:46:10.778 INFO [stderr] 
Nov 30 11:46:10.778 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 11:46:10.778 INFO [stderr]   --> src/main.rs:75:5
Nov 30 11:46:10.778 INFO [stderr]    |
Nov 30 11:46:10.778 INFO [stderr] 75 |     Command::new("clear").status();
Nov 30 11:46:10.778 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 11:46:10.778 INFO [stderr]    |
Nov 30 11:46:10.778 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 11:46:10.778 INFO [stderr] 
Nov 30 11:46:10.838 INFO [stderr] warning: value assigned to `grid_bis` is never read
Nov 30 11:46:10.838 INFO [stderr]   --> src/main.rs:18:13
Nov 30 11:46:10.838 INFO [stderr]    |
Nov 30 11:46:10.839 INFO [stderr] 18 |     let mut grid_bis = [[0i8; 4];4];
Nov 30 11:46:10.839 INFO [stderr]    |             ^^^^^^^^
Nov 30 11:46:10.839 INFO [stderr]    |
Nov 30 11:46:10.839 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 30 11:46:10.839 INFO [stderr] 
Nov 30 11:46:10.864 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:46:10.864 INFO [stderr]   --> src/main.rs:97:28
Nov 30 11:46:10.864 INFO [stderr]    |
Nov 30 11:46:10.864 INFO [stderr] 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4])
Nov 30 11:46:10.864 INFO [stderr]    |                            ----^^^^
Nov 30 11:46:10.864 INFO [stderr]    |                            |
Nov 30 11:46:10.864 INFO [stderr]    |                            help: remove this `mut`
Nov 30 11:46:10.864 INFO [stderr]    |
Nov 30 11:46:10.864 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 30 11:46:10.864 INFO [stderr] 
Nov 30 11:46:10.880 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:46:10.880 INFO [stderr]    --> src/main.rs:137:13
Nov 30 11:46:10.880 INFO [stderr]     |
Nov 30 11:46:10.880 INFO [stderr] 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4])
Nov 30 11:46:10.880 INFO [stderr]     |             ----^^^^
Nov 30 11:46:10.880 INFO [stderr]     |             |
Nov 30 11:46:10.880 INFO [stderr]     |             help: remove this `mut`
Nov 30 11:46:10.880 INFO [stderr] 
Nov 30 11:46:10.888 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 11:46:10.888 INFO [stderr]   --> src/main.rs:52:13
Nov 30 11:46:10.888 INFO [stderr]    |
Nov 30 11:46:10.888 INFO [stderr] 52 |             Command::new("clear").status();
Nov 30 11:46:10.888 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 11:46:10.888 INFO [stderr]    |
Nov 30 11:46:10.888 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 30 11:46:10.888 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 11:46:10.888 INFO [stderr] 
Nov 30 11:46:10.888 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 30 11:46:10.888 INFO [stderr]   --> src/main.rs:75:5
Nov 30 11:46:10.888 INFO [stderr]    |
Nov 30 11:46:10.888 INFO [stderr] 75 |     Command::new("clear").status();
Nov 30 11:46:10.888 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 11:46:10.888 INFO [stderr]    |
Nov 30 11:46:10.888 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 11:46:10.888 INFO [stderr] 
Nov 30 11:46:10.915 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
Nov 30 11:46:10.925 INFO [stderr] su: No module specific data is present
Nov 30 11:46:12.385 INFO running `"docker" "inspect" "5e768fb3e68f4cc13179e26d5ff44ff5a24f7c85c589a9378540ebae0ba33659"`
Nov 30 11:46:12.668 INFO running `"docker" "rm" "-f" "5e768fb3e68f4cc13179e26d5ff44ff5a24f7c85c589a9378540ebae0ba33659"`
Nov 30 11:46:13.040 INFO [stdout] 5e768fb3e68f4cc13179e26d5ff44ff5a24f7c85c589a9378540ebae0ba33659