Dec 06 15:10:14.531 INFO testing Cackbone/2048.rs against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 06 15:10:14.531 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-1/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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 15:10:14.868 INFO [stdout] 4af3c03c378979c6a89895754fe075bee969941fe237e10f78e85ca6d3ab3b25
Dec 06 15:10:14.876 INFO running `"docker" "start" "-a" "4af3c03c378979c6a89895754fe075bee969941fe237e10f78e85ca6d3ab3b25"`
Dec 06 15:10:15.888 INFO [stderr] usermod: no changes
Dec 06 15:10:15.928 INFO [stderr]    Compiling rust_2048 v0.1.0 (/source)
Dec 06 15:10:16.356 INFO [stderr] warning: value assigned to `grid_bis` is never read
Dec 06 15:10:16.356 INFO [stderr]   --> src/main.rs:18:13
Dec 06 15:10:16.356 INFO [stderr]    |
Dec 06 15:10:16.356 INFO [stderr] 18 |     let mut grid_bis = [[0i8; 4];4];
Dec 06 15:10:16.356 INFO [stderr]    |             ^^^^^^^^
Dec 06 15:10:16.356 INFO [stderr]    |
Dec 06 15:10:16.356 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 06 15:10:16.356 INFO [stderr] 
Dec 06 15:10:16.369 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:10:16.369 INFO [stderr]   --> src/main.rs:97:28
Dec 06 15:10:16.369 INFO [stderr]    |
Dec 06 15:10:16.369 INFO [stderr] 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4])
Dec 06 15:10:16.369 INFO [stderr]    |                            ----^^^^
Dec 06 15:10:16.369 INFO [stderr]    |                            |
Dec 06 15:10:16.369 INFO [stderr]    |                            help: remove this `mut`
Dec 06 15:10:16.369 INFO [stderr]    |
Dec 06 15:10:16.369 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 15:10:16.369 INFO [stderr] 
Dec 06 15:10:16.369 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:10:16.369 INFO [stderr]    --> src/main.rs:137:13
Dec 06 15:10:16.369 INFO [stderr]     |
Dec 06 15:10:16.369 INFO [stderr] 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4])
Dec 06 15:10:16.369 INFO [stderr]     |             ----^^^^
Dec 06 15:10:16.369 INFO [stderr]     |             |
Dec 06 15:10:16.369 INFO [stderr]     |             help: remove this `mut`
Dec 06 15:10:16.369 INFO [stderr] 
Dec 06 15:10:16.376 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:10:16.376 INFO [stderr]   --> src/main.rs:52:13
Dec 06 15:10:16.376 INFO [stderr]    |
Dec 06 15:10:16.376 INFO [stderr] 52 |             Command::new("clear").status();
Dec 06 15:10:16.376 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:10:16.376 INFO [stderr]    |
Dec 06 15:10:16.376 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 15:10:16.376 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:10:16.376 INFO [stderr] 
Dec 06 15:10:16.376 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:10:16.376 INFO [stderr]   --> src/main.rs:75:5
Dec 06 15:10:16.376 INFO [stderr]    |
Dec 06 15:10:16.376 INFO [stderr] 75 |     Command::new("clear").status();
Dec 06 15:10:16.376 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:10:16.376 INFO [stderr]    |
Dec 06 15:10:16.376 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:10:16.376 INFO [stderr] 
Dec 06 15:10:17.018 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.11s
Dec 06 15:10:17.018 INFO [stderr] su: No module specific data is present
Dec 06 15:10:17.584 INFO running `"docker" "inspect" "4af3c03c378979c6a89895754fe075bee969941fe237e10f78e85ca6d3ab3b25"`
Dec 06 15:10:17.718 INFO running `"docker" "rm" "-f" "4af3c03c378979c6a89895754fe075bee969941fe237e10f78e85ca6d3ab3b25"`
Dec 06 15:10:17.923 INFO [stdout] 4af3c03c378979c6a89895754fe075bee969941fe237e10f78e85ca6d3ab3b25
Dec 06 15:10:17.925 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-1/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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 15:10:18.116 INFO [stdout] cb110b7222a1123c10bca32cf92c9590aecbda550021b536b2747c670fbd6b21
Dec 06 15:10:18.120 INFO running `"docker" "start" "-a" "cb110b7222a1123c10bca32cf92c9590aecbda550021b536b2747c670fbd6b21"`
Dec 06 15:10:19.027 INFO [stderr] usermod: no changes
Dec 06 15:10:19.104 INFO [stderr]    Compiling rust_2048 v0.1.0 (/source)
Dec 06 15:10:19.624 INFO [stderr] warning: value assigned to `grid_bis` is never read
Dec 06 15:10:19.624 INFO [stderr]   --> src/main.rs:18:13
Dec 06 15:10:19.624 INFO [stderr]    |
Dec 06 15:10:19.624 INFO [stderr] 18 |     let mut grid_bis = [[0i8; 4];4];
Dec 06 15:10:19.624 INFO [stderr]    |             ^^^^^^^^
Dec 06 15:10:19.624 INFO [stderr]    |
Dec 06 15:10:19.624 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 06 15:10:19.624 INFO [stderr] 
Dec 06 15:10:19.631 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:10:19.631 INFO [stderr]   --> src/main.rs:97:28
Dec 06 15:10:19.631 INFO [stderr]    |
Dec 06 15:10:19.631 INFO [stderr] 97 | fn move_grid(d: Direction, mut grid: &mut [[i8; 4]; 4])
Dec 06 15:10:19.631 INFO [stderr]    |                            ----^^^^
Dec 06 15:10:19.631 INFO [stderr]    |                            |
Dec 06 15:10:19.631 INFO [stderr]    |                            help: remove this `mut`
Dec 06 15:10:19.631 INFO [stderr]    |
Dec 06 15:10:19.631 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 15:10:19.631 INFO [stderr] 
Dec 06 15:10:19.636 INFO [stderr] warning: variable does not need to be mutable
Dec 06 15:10:19.636 INFO [stderr]    --> src/main.rs:137:13
Dec 06 15:10:19.636 INFO [stderr]     |
Dec 06 15:10:19.636 INFO [stderr] 137 | fn add_tile(mut grid: &mut [[i8; 4]; 4])
Dec 06 15:10:19.636 INFO [stderr]     |             ----^^^^
Dec 06 15:10:19.636 INFO [stderr]     |             |
Dec 06 15:10:19.636 INFO [stderr]     |             help: remove this `mut`
Dec 06 15:10:19.636 INFO [stderr] 
Dec 06 15:10:19.640 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:10:19.640 INFO [stderr]   --> src/main.rs:52:13
Dec 06 15:10:19.640 INFO [stderr]    |
Dec 06 15:10:19.640 INFO [stderr] 52 |             Command::new("clear").status();
Dec 06 15:10:19.640 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:10:19.640 INFO [stderr]    |
Dec 06 15:10:19.640 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 15:10:19.640 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:10:19.640 INFO [stderr] 
Dec 06 15:10:19.640 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 15:10:19.640 INFO [stderr]   --> src/main.rs:75:5
Dec 06 15:10:19.640 INFO [stderr]    |
Dec 06 15:10:19.640 INFO [stderr] 75 |     Command::new("clear").status();
Dec 06 15:10:19.640 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 15:10:19.640 INFO [stderr]    |
Dec 06 15:10:19.640 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 15:10:19.640 INFO [stderr] 
Dec 06 15:10:20.031 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
Dec 06 15:10:20.034 INFO [stderr] su: No module specific data is present
Dec 06 15:10:20.800 INFO running `"docker" "inspect" "cb110b7222a1123c10bca32cf92c9590aecbda550021b536b2747c670fbd6b21"`
Dec 06 15:10:21.003 INFO running `"docker" "rm" "-f" "cb110b7222a1123c10bca32cf92c9590aecbda550021b536b2747c670fbd6b21"`
Dec 06 15:10:21.304 INFO [stdout] cb110b7222a1123c10bca32cf92c9590aecbda550021b536b2747c670fbd6b21
Dec 06 15:10:21.307 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-1/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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 15:10:21.753 INFO [stdout] a55457a0517b9b5f8b78c513aea7b84b1f5da4768b30a200eb24db9dc178106a
Dec 06 15:10:21.755 INFO running `"docker" "start" "-a" "a55457a0517b9b5f8b78c513aea7b84b1f5da4768b30a200eb24db9dc178106a"`
Dec 06 15:10:22.848 INFO [stderr] usermod: no changes
Dec 06 15:10:22.920 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
Dec 06 15:10:22.920 INFO [stderr]      Running /target/debug/deps/rust_2048-34d3e0fd15e06983
Dec 06 15:10:22.920 INFO [stderr] su: No module specific data is present
Dec 06 15:10:22.920 INFO [stdout] 
Dec 06 15:10:22.920 INFO [stdout] running 0 tests
Dec 06 15:10:22.920 INFO [stdout] 
Dec 06 15:10:22.920 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 15:10:22.920 INFO [stdout] 
Dec 06 15:10:23.810 INFO running `"docker" "inspect" "a55457a0517b9b5f8b78c513aea7b84b1f5da4768b30a200eb24db9dc178106a"`
Dec 06 15:10:24.212 INFO running `"docker" "rm" "-f" "a55457a0517b9b5f8b78c513aea7b84b1f5da4768b30a200eb24db9dc178106a"`
Dec 06 15:10:24.498 INFO [stdout] a55457a0517b9b5f8b78c513aea7b84b1f5da4768b30a200eb24db9dc178106a