Dec 06 15:10:13.535 INFO testing Cackbone/2048.rs against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 15:10:13.535 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-4/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt build --frozen" "-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"`
Dec 06 15:10:14.164 INFO [stdout] 88f273c525c7a7d815c866e6a0abeedc5cf1c7537cd474c694f42104b4a26fb7
Dec 06 15:10:14.166 INFO running `"docker" "start" "-a" "88f273c525c7a7d815c866e6a0abeedc5cf1c7537cd474c694f42104b4a26fb7"`
Dec 06 15:10:15.487 INFO [stderr] usermod: no changes
Dec 06 15:10:15.550 INFO [stderr]    Compiling rust_2048 v0.1.0 (/source)
Dec 06 15:10:15.958 INFO [stderr] warning: value assigned to `grid_bis` is never read
Dec 06 15:10:15.958 INFO [stderr]   --> src/main.rs:18:13
Dec 06 15:10:15.958 INFO [stderr]    |
Dec 06 15:10:15.958 INFO [stderr] 18 |     let mut grid_bis = [[0i8; 4];4];
Dec 06 15:10:15.958 INFO [stderr]    |             ^^^^^^^^
Dec 06 15:10:15.959 INFO [stderr]    |
Dec 06 15:10:15.959 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 06 15:10:15.959 INFO [stderr] 
Dec 06 15:10:15.976 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:10:15.976 INFO [stderr]   --> src/main.rs:97:28
Dec 06 15:10:15.976 INFO [stderr]    |
Dec 06 15:10:15.976 INFO [stderr] 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4])
Dec 06 15:10:15.976 INFO [stderr]    |                            ----^^^^
Dec 06 15:10:15.976 INFO [stderr]    |                            |
Dec 06 15:10:15.976 INFO [stderr]    |                            help: remove this `mut`
Dec 06 15:10:15.976 INFO [stderr]    |
Dec 06 15:10:15.976 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 15:10:15.976 INFO [stderr] 
Dec 06 15:10:15.976 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:10:15.977 INFO [stderr]    --> src/main.rs:137:13
Dec 06 15:10:15.977 INFO [stderr]     |
Dec 06 15:10:15.977 INFO [stderr] 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4])
Dec 06 15:10:15.977 INFO [stderr]     |             ----^^^^
Dec 06 15:10:15.977 INFO [stderr]     |             |
Dec 06 15:10:15.977 INFO [stderr]     |             help: remove this `mut`
Dec 06 15:10:15.977 INFO [stderr] 
Dec 06 15:10:15.984 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:10:15.984 INFO [stderr]   --> src/main.rs:52:13
Dec 06 15:10:15.984 INFO [stderr]    |
Dec 06 15:10:15.984 INFO [stderr] 52 |             Command::new("clear").status();
Dec 06 15:10:15.984 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:10:15.984 INFO [stderr]    |
Dec 06 15:10:15.984 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 15:10:15.984 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:10:15.984 INFO [stderr] 
Dec 06 15:10:15.984 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:10:15.984 INFO [stderr]   --> src/main.rs:75:5
Dec 06 15:10:15.984 INFO [stderr]    |
Dec 06 15:10:15.984 INFO [stderr] 75 |     Command::new("clear").status();
Dec 06 15:10:15.984 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:10:15.984 INFO [stderr]    |
Dec 06 15:10:15.984 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:10:15.984 INFO [stderr] 
Dec 06 15:10:16.642 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.12s
Dec 06 15:10:16.645 INFO [stderr] su: No module specific data is present
Dec 06 15:10:17.470 INFO running `"docker" "inspect" "88f273c525c7a7d815c866e6a0abeedc5cf1c7537cd474c694f42104b4a26fb7"`
Dec 06 15:10:17.606 INFO running `"docker" "rm" "-f" "88f273c525c7a7d815c866e6a0abeedc5cf1c7537cd474c694f42104b4a26fb7"`
Dec 06 15:10:17.728 INFO [stdout] 88f273c525c7a7d815c866e6a0abeedc5cf1c7537cd474c694f42104b4a26fb7
Dec 06 15:10:17.730 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-4/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --frozen --no-run" "-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"`
Dec 06 15:10:17.971 INFO [stdout] 665f06a8d137c42906e25cd3020ca82cc7be9ce8a5c4e177e3c3fbe1d6cfded1
Dec 06 15:10:17.974 INFO running `"docker" "start" "-a" "665f06a8d137c42906e25cd3020ca82cc7be9ce8a5c4e177e3c3fbe1d6cfded1"`
Dec 06 15:10:18.400 INFO [stderr] usermod: no changes
Dec 06 15:10:18.432 INFO [stderr]    Compiling rust_2048 v0.1.0 (/source)
Dec 06 15:10:18.848 INFO [stderr] warning: value assigned to `grid_bis` is never read
Dec 06 15:10:18.848 INFO [stderr]   --> src/main.rs:18:13
Dec 06 15:10:18.848 INFO [stderr]    |
Dec 06 15:10:18.848 INFO [stderr] 18 |     let mut grid_bis = [[0i8; 4];4];
Dec 06 15:10:18.848 INFO [stderr]    |             ^^^^^^^^
Dec 06 15:10:18.848 INFO [stderr]    |
Dec 06 15:10:18.848 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 06 15:10:18.848 INFO [stderr] 
Dec 06 15:10:18.860 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:10:18.860 INFO [stderr]   --> src/main.rs:97:28
Dec 06 15:10:18.860 INFO [stderr]    |
Dec 06 15:10:18.860 INFO [stderr] 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4])
Dec 06 15:10:18.860 INFO [stderr]    |                            ----^^^^
Dec 06 15:10:18.860 INFO [stderr]    |                            |
Dec 06 15:10:18.860 INFO [stderr]    |                            help: remove this `mut`
Dec 06 15:10:18.860 INFO [stderr]    |
Dec 06 15:10:18.860 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 15:10:18.860 INFO [stderr] 
Dec 06 15:10:18.868 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:10:18.868 INFO [stderr]    --> src/main.rs:137:13
Dec 06 15:10:18.868 INFO [stderr]     |
Dec 06 15:10:18.868 INFO [stderr] 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4])
Dec 06 15:10:18.868 INFO [stderr]     |             ----^^^^
Dec 06 15:10:18.868 INFO [stderr]     |             |
Dec 06 15:10:18.868 INFO [stderr]     |             help: remove this `mut`
Dec 06 15:10:18.868 INFO [stderr] 
Dec 06 15:10:18.871 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:10:18.876 INFO [stderr]   --> src/main.rs:52:13
Dec 06 15:10:18.876 INFO [stderr]    |
Dec 06 15:10:18.876 INFO [stderr] 52 |             Command::new("clear").status();
Dec 06 15:10:18.876 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:10:18.876 INFO [stderr]    |
Dec 06 15:10:18.876 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 15:10:18.876 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:10:18.876 INFO [stderr] 
Dec 06 15:10:18.876 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:10:18.876 INFO [stderr]   --> src/main.rs:75:5
Dec 06 15:10:18.876 INFO [stderr]    |
Dec 06 15:10:18.876 INFO [stderr] 75 |     Command::new("clear").status();
Dec 06 15:10:18.876 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:10:18.876 INFO [stderr]    |
Dec 06 15:10:18.876 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:10:18.876 INFO [stderr] 
Dec 06 15:10:19.112 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
Dec 06 15:10:19.112 INFO [stderr] su: No module specific data is present
Dec 06 15:10:20.106 INFO running `"docker" "inspect" "665f06a8d137c42906e25cd3020ca82cc7be9ce8a5c4e177e3c3fbe1d6cfded1"`
Dec 06 15:10:20.308 INFO running `"docker" "rm" "-f" "665f06a8d137c42906e25cd3020ca82cc7be9ce8a5c4e177e3c3fbe1d6cfded1"`
Dec 06 15:10:20.576 INFO [stdout] 665f06a8d137c42906e25cd3020ca82cc7be9ce8a5c4e177e3c3fbe1d6cfded1
Dec 06 15:10:20.579 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-4/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --frozen" "-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"`
Dec 06 15:10:20.854 INFO [stdout] 6d2bf4d80817f508cd8376bc130a7d729b350eb132b089c48aae0337d333f958
Dec 06 15:10:20.856 INFO running `"docker" "start" "-a" "6d2bf4d80817f508cd8376bc130a7d729b350eb132b089c48aae0337d333f958"`
Dec 06 15:10:21.981 INFO [stderr] usermod: no changes
Dec 06 15:10:22.050 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
Dec 06 15:10:22.050 INFO [stderr]      Running /target/debug/deps/rust_2048-31c68715fb741c26
Dec 06 15:10:22.050 INFO [stdout] 
Dec 06 15:10:22.050 INFO [stdout] running 0 tests
Dec 06 15:10:22.050 INFO [stdout] 
Dec 06 15:10:22.050 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 15:10:22.050 INFO [stdout] 
Dec 06 15:10:22.055 INFO [stderr] su: No module specific data is present
Dec 06 15:10:22.592 INFO running `"docker" "inspect" "6d2bf4d80817f508cd8376bc130a7d729b350eb132b089c48aae0337d333f958"`
Dec 06 15:10:22.912 INFO running `"docker" "rm" "-f" "6d2bf4d80817f508cd8376bc130a7d729b350eb132b089c48aae0337d333f958"`
Dec 06 15:10:23.339 INFO [stdout] 6d2bf4d80817f508cd8376bc130a7d729b350eb132b089c48aae0337d333f958