Nov 01 12:50:28.822 INFO checking Cackbone/2048.rs against try#d7816399d50d407bbce1efe9dbadf8faaaf568fc for pr-55538
Nov 01 12:50:28.823 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-2/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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"`
Nov 01 12:50:29.264 INFO blam! 7ce64035baf67c25ea33ce6ee8f01955f2810c5fa7d257589aed22c2c7016678
Nov 01 12:50:29.266 INFO running `"docker" "start" "-a" "7ce64035baf67c25ea33ce6ee8f01955f2810c5fa7d257589aed22c2c7016678"`
Nov 01 12:50:31.175 INFO kablam! usermod: no changes
Nov 01 12:50:31.232 INFO kablam!     Checking rust_2048 v0.1.0 (/source)
Nov 01 12:50:32.338 INFO kablam! warning: value assigned to `grid_bis` is never read
Nov 01 12:50:32.339 INFO kablam!   --> src/main.rs:18:13
Nov 01 12:50:32.340 INFO kablam!    |
Nov 01 12:50:32.341 INFO kablam! 18 |     let mut grid_bis = [[0i8; 4];4];
Nov 01 12:50:32.341 INFO kablam!    |             ^^^^^^^^
Nov 01 12:50:32.342 INFO kablam!    |
Nov 01 12:50:32.342 INFO kablam!    = note: #[warn(unused_assignments)] on by default
Nov 01 12:50:32.343 INFO kablam! 
Nov 01 12:50:32.357 INFO kablam! warning: value assigned to `grid_bis` is never read
Nov 01 12:50:32.358 INFO kablam!   --> src/main.rs:18:13
Nov 01 12:50:32.359 INFO kablam!    |
Nov 01 12:50:32.360 INFO kablam! 18 |     let mut grid_bis = [[0i8; 4];4];
Nov 01 12:50:32.360 INFO kablam!    |             ^^^^^^^^
Nov 01 12:50:32.361 INFO kablam!    |
Nov 01 12:50:32.362 INFO kablam!    = note: #[warn(unused_assignments)] on by default
Nov 01 12:50:32.362 INFO kablam! 
Nov 01 12:50:32.377 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:50:32.378 INFO kablam!   --> src/main.rs:97:28
Nov 01 12:50:32.378 INFO kablam!    |
Nov 01 12:50:32.379 INFO kablam! 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4])
Nov 01 12:50:32.380 INFO kablam!    |                            ----^^^^
Nov 01 12:50:32.380 INFO kablam!    |                            |
Nov 01 12:50:32.381 INFO kablam!    |                            help: remove this `mut`
Nov 01 12:50:32.382 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:50:32.382 INFO kablam!   --> src/main.rs:97:28
Nov 01 12:50:32.383 INFO kablam!    |
Nov 01 12:50:32.384 INFO kablam! 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4])
Nov 01 12:50:32.384 INFO kablam!    |                            ----^^^^
Nov 01 12:50:32.385 INFO kablam!    |                            |
Nov 01 12:50:32.385 INFO kablam!    |                            help: remove this `mut`
Nov 01 12:50:32.385 INFO kablam!    |
Nov 01 12:50:32.385 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 01 12:50:32.385 INFO kablam! 
Nov 01 12:50:32.385 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:50:32.385 INFO kablam!    --> src/main.rs:137:13
Nov 01 12:50:32.385 INFO kablam!     |
Nov 01 12:50:32.385 INFO kablam! 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4])
Nov 01 12:50:32.389 INFO kablam!     |             ----^^^^
Nov 01 12:50:32.390 INFO kablam!     |             |
Nov 01 12:50:32.390 INFO kablam!     |             help: remove this `mut`
Nov 01 12:50:32.390 INFO kablam! 
Nov 01 12:50:32.390 INFO kablam!    |
Nov 01 12:50:32.390 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 01 12:50:32.390 INFO kablam! 
Nov 01 12:50:32.391 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:50:32.392 INFO kablam!    --> src/main.rs:137:13
Nov 01 12:50:32.392 INFO kablam!     |
Nov 01 12:50:32.393 INFO kablam! 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4])
Nov 01 12:50:32.394 INFO kablam!     |             ----^^^^
Nov 01 12:50:32.394 INFO kablam!     |             |
Nov 01 12:50:32.395 INFO kablam!     |             help: remove this `mut`
Nov 01 12:50:32.395 INFO kablam! 
Nov 01 12:50:32.406 INFO kablam! warning: unused `std::result::Result` that must be used
Nov 01 12:50:32.407 INFO kablam! warning: unused `std::result::Result` that must be used
Nov 01 12:50:32.407 INFO kablam!   --> src/main.rs:52:13
Nov 01 12:50:32.408 INFO kablam!    |
Nov 01 12:50:32.408 INFO kablam! 52 |             Command::new("clear").status();
Nov 01 12:50:32.409 INFO kablam!    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 01 12:50:32.410 INFO kablam!   --> src/main.rs:52:13
Nov 01 12:50:32.410 INFO kablam!    |
Nov 01 12:50:32.411 INFO kablam! 52 |             Command::new("clear").status();
Nov 01 12:50:32.411 INFO kablam!    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 01 12:50:32.412 INFO kablam!    |
Nov 01 12:50:32.413 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Nov 01 12:50:32.413 INFO kablam!    = note: this `Result` may be an `Err` variant, which should be handled
Nov 01 12:50:32.414 INFO kablam! 
Nov 01 12:50:32.414 INFO kablam! warning: unused `std::result::Result` that must be used
Nov 01 12:50:32.414 INFO kablam!   --> src/main.rs:75:5
Nov 01 12:50:32.414 INFO kablam!    |
Nov 01 12:50:32.414 INFO kablam! 75 |     Command::new("clear").status();
Nov 01 12:50:32.414 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 01 12:50:32.414 INFO kablam!    |
Nov 01 12:50:32.414 INFO kablam!    = note: this `Result` may be an `Err` variant, which should be handled
Nov 01 12:50:32.414 INFO kablam! 
Nov 01 12:50:32.416 INFO kablam!    |
Nov 01 12:50:32.416 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Nov 01 12:50:32.417 INFO kablam!    = note: this `Result` may be an `Err` variant, which should be handled
Nov 01 12:50:32.418 INFO kablam! 
Nov 01 12:50:32.418 INFO kablam! warning: unused `std::result::Result` that must be used
Nov 01 12:50:32.419 INFO kablam!   --> src/main.rs:75:5
Nov 01 12:50:32.420 INFO kablam!    |
Nov 01 12:50:32.420 INFO kablam! 75 |     Command::new("clear").status();
Nov 01 12:50:32.421 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 01 12:50:32.421 INFO kablam!    |
Nov 01 12:50:32.422 INFO kablam!    = note: this `Result` may be an `Err` variant, which should be handled
Nov 01 12:50:32.422 INFO kablam! 
Nov 01 12:50:32.490 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.29s
Nov 01 12:50:32.501 INFO kablam! su: No module specific data is present
Nov 01 12:50:33.620 INFO running `"docker" "rm" "-f" "7ce64035baf67c25ea33ce6ee8f01955f2810c5fa7d257589aed22c2c7016678"`
Nov 01 12:50:33.876 INFO blam! 7ce64035baf67c25ea33ce6ee8f01955f2810c5fa7d257589aed22c2c7016678