Oct 13 05:20:16.058 INFO checking Cackbone/2048.rs against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977 Oct 13 05:20:16.058 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-1/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-1/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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 13 05:20:16.441 INFO blam! 6c917aef66287e0a1ed7d18eed21e24083bed7ae2e2a4add88bf56fd33bc195e Oct 13 05:20:16.449 INFO running `"docker" "start" "-a" "6c917aef66287e0a1ed7d18eed21e24083bed7ae2e2a4add88bf56fd33bc195e"` Oct 13 05:20:17.472 INFO kablam! usermod: no changes Oct 13 05:20:17.544 INFO kablam! Checking rust_2048 v0.1.0 (/source) Oct 13 05:20:18.307 INFO kablam! warning: value assigned to `grid_bis` is never read Oct 13 05:20:18.307 INFO kablam! --> src/main.rs:18:13 Oct 13 05:20:18.307 INFO kablam! | Oct 13 05:20:18.307 INFO kablam! 18 | let mut grid_bis = [[0i8; 4];4]; Oct 13 05:20:18.307 INFO kablam! | ^^^^^^^^ Oct 13 05:20:18.307 INFO kablam! | Oct 13 05:20:18.307 INFO kablam! = note: #[warn(unused_assignments)] on by default Oct 13 05:20:18.307 INFO kablam! Oct 13 05:20:18.315 INFO kablam! warning: variable does not need to be mutable Oct 13 05:20:18.315 INFO kablam! --> src/main.rs:97:28 Oct 13 05:20:18.315 INFO kablam! | Oct 13 05:20:18.315 INFO kablam! 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4]) Oct 13 05:20:18.315 INFO kablam! | ----^^^^ Oct 13 05:20:18.315 INFO kablam! | | Oct 13 05:20:18.315 INFO kablam! | help: remove this `mut` Oct 13 05:20:18.315 INFO kablam! | Oct 13 05:20:18.317 INFO kablam! = note: #[warn(unused_mut)] on by default Oct 13 05:20:18.317 INFO kablam! Oct 13 05:20:18.317 INFO kablam! warning: variable does not need to be mutable Oct 13 05:20:18.317 INFO kablam! --> src/main.rs:137:13 Oct 13 05:20:18.317 INFO kablam! | Oct 13 05:20:18.317 INFO kablam! 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4]) Oct 13 05:20:18.317 INFO kablam! | ----^^^^ Oct 13 05:20:18.317 INFO kablam! | | Oct 13 05:20:18.319 INFO kablam! | help: remove this `mut` Oct 13 05:20:18.319 INFO kablam! Oct 13 05:20:18.327 INFO kablam! warning: unused `std::result::Result` which must be used Oct 13 05:20:18.327 INFO kablam! --> src/main.rs:52:13 Oct 13 05:20:18.327 INFO kablam! | Oct 13 05:20:18.328 INFO kablam! 52 | Command::new("clear").status(); Oct 13 05:20:18.328 INFO kablam! | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Oct 13 05:20:18.328 INFO kablam! | Oct 13 05:20:18.328 INFO kablam! = note: #[warn(unused_must_use)] on by default Oct 13 05:20:18.329 INFO kablam! = note: this `Result` may be an `Err` variant, which should be handled Oct 13 05:20:18.329 INFO kablam! Oct 13 05:20:18.329 INFO kablam! warning: unused `std::result::Result` which must be used Oct 13 05:20:18.329 INFO kablam! --> src/main.rs:75:5 Oct 13 05:20:18.329 INFO kablam! | Oct 13 05:20:18.329 INFO kablam! 75 | Command::new("clear").status(); Oct 13 05:20:18.329 INFO kablam! | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Oct 13 05:20:18.329 INFO kablam! | Oct 13 05:20:18.329 INFO kablam! = note: this `Result` may be an `Err` variant, which should be handled Oct 13 05:20:18.329 INFO kablam! Oct 13 05:20:18.754 INFO kablam! warning: value assigned to `grid_bis` is never read Oct 13 05:20:18.754 INFO kablam! --> src/main.rs:18:13 Oct 13 05:20:18.754 INFO kablam! | Oct 13 05:20:18.754 INFO kablam! 18 | let mut grid_bis = [[0i8; 4];4]; Oct 13 05:20:18.754 INFO kablam! | ^^^^^^^^ Oct 13 05:20:18.754 INFO kablam! | Oct 13 05:20:18.754 INFO kablam! = note: #[warn(unused_assignments)] on by default Oct 13 05:20:18.754 INFO kablam! Oct 13 05:20:18.763 INFO kablam! warning: variable does not need to be mutable Oct 13 05:20:18.763 INFO kablam! --> src/main.rs:97:28 Oct 13 05:20:18.763 INFO kablam! | Oct 13 05:20:18.763 INFO kablam! 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4]) Oct 13 05:20:18.763 INFO kablam! | ----^^^^ Oct 13 05:20:18.763 INFO kablam! | | Oct 13 05:20:18.763 INFO kablam! | help: remove this `mut` Oct 13 05:20:18.764 INFO kablam! | Oct 13 05:20:18.764 INFO kablam! = note: #[warn(unused_mut)] on by default Oct 13 05:20:18.764 INFO kablam! Oct 13 05:20:18.764 INFO kablam! warning: variable does not need to be mutable Oct 13 05:20:18.765 INFO kablam! --> src/main.rs:137:13 Oct 13 05:20:18.765 INFO kablam! | Oct 13 05:20:18.765 INFO kablam! 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4]) Oct 13 05:20:18.765 INFO kablam! | ----^^^^ Oct 13 05:20:18.765 INFO kablam! | | Oct 13 05:20:18.766 INFO kablam! | help: remove this `mut` Oct 13 05:20:18.766 INFO kablam! Oct 13 05:20:18.773 INFO kablam! warning: unused `std::result::Result` which must be used Oct 13 05:20:18.774 INFO kablam! --> src/main.rs:52:13 Oct 13 05:20:18.774 INFO kablam! | Oct 13 05:20:18.774 INFO kablam! 52 | Command::new("clear").status(); Oct 13 05:20:18.774 INFO kablam! | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Oct 13 05:20:18.775 INFO kablam! | Oct 13 05:20:18.775 INFO kablam! = note: #[warn(unused_must_use)] on by default Oct 13 05:20:18.775 INFO kablam! = note: this `Result` may be an `Err` variant, which should be handled Oct 13 05:20:18.775 INFO kablam! Oct 13 05:20:18.775 INFO kablam! warning: unused `std::result::Result` which must be used Oct 13 05:20:18.776 INFO kablam! --> src/main.rs:75:5 Oct 13 05:20:18.776 INFO kablam! | Oct 13 05:20:18.776 INFO kablam! 75 | Command::new("clear").status(); Oct 13 05:20:18.776 INFO kablam! | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Oct 13 05:20:18.776 INFO kablam! | Oct 13 05:20:18.777 INFO kablam! = note: this `Result` may be an `Err` variant, which should be handled Oct 13 05:20:18.777 INFO kablam! Oct 13 05:20:18.820 INFO kablam! Finished dev [unoptimized + debuginfo] target(s) in 1.33s Oct 13 05:20:18.823 INFO kablam! su: No module specific data is present Oct 13 05:20:19.989 INFO running `"docker" "rm" "-f" "6c917aef66287e0a1ed7d18eed21e24083bed7ae2e2a4add88bf56fd33bc195e"` Oct 13 05:20:20.275 INFO blam! 6c917aef66287e0a1ed7d18eed21e24083bed7ae2e2a4add88bf56fd33bc195e