[INFO] fetching crate game-2048 0.5.1...
[INFO] checking game-2048-0.5.1 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate game-2048 0.5.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate game-2048 0.5.1 on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate game-2048 0.5.1
[INFO] finished tweaking crates.io crate game-2048 0.5.1
[INFO] tweaked toml for crates.io crate game-2048 0.5.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3db0e034a966b6998b7d24f29aff514c440eed19f3649eb7603f02572dbc795
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a3db0e034a966b6998b7d24f29aff514c440eed19f3649eb7603f02572dbc795", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3db0e034a966b6998b7d24f29aff514c440eed19f3649eb7603f02572dbc795", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3db0e034a966b6998b7d24f29aff514c440eed19f3649eb7603f02572dbc795", kill_on_drop: false }`
[INFO] [stdout] a3db0e034a966b6998b7d24f29aff514c440eed19f3649eb7603f02572dbc795
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6955546fa0d1c68c5221e6861921f627149c2c1c66ee5ab8ff77360b73429fb8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6955546fa0d1c68c5221e6861921f627149c2c1c66ee5ab8ff77360b73429fb8", kill_on_drop: false }`
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking matrix_display v0.3.0
[INFO] [stderr]     Checking game-2048 v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated function `rand::sample`: renamed to seq::sample_iter
[INFO] [stdout]  --> src/board.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rand::{thread_rng, sample};
[INFO] [stdout]   |                        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::sample`: renamed to seq::sample_iter
[INFO] [stdout]   --> src/board.rs:57:22
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let mut fw = sample(&mut rng, 1..256, 17);
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::sample`: renamed to seq::sample_iter
[INFO] [stdout]  --> src/board.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rand::{thread_rng, sample};
[INFO] [stdout]   |                        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::sample`: renamed to seq::sample_iter
[INFO] [stdout]   --> src/board.rs:57:22
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let mut fw = sample(&mut rng, 1..256, 17);
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: floating-point types cannot be used in patterns
[INFO] [stdout]   --> src/board.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |                      1_f64 => (".".to_string(), col),
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(illegal_floating_point_literal_pattern)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/game.rs:70:19
[INFO] [stdout]    |
[INFO] [stdout] 70 |             .map(|mut row| {
[INFO] [stdout]    |                   ----^^^
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `collect` that must be used
[INFO] [stdout]   --> src/game.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 | /         self.data
[INFO] [stdout] 69 | |             .chunks_mut(4)
[INFO] [stdout] 70 | |             .map(|mut row| {
[INFO] [stdout] 71 | |                 let (new_row, new_score) = match dir {
[INFO] [stdout] ...  |
[INFO] [stdout] 86 | |             })
[INFO] [stdout] 87 | |             .collect::<Vec<_>>();
[INFO] [stdout]    | |_________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: floating-point types cannot be used in patterns
[INFO] [stdout]   --> src/board.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |                      1_f64 => (".".to_string(), col),
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(illegal_floating_point_literal_pattern)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/game.rs:70:19
[INFO] [stdout]    |
[INFO] [stdout] 70 |             .map(|mut row| {
[INFO] [stdout]    |                   ----^^^
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `collect` that must be used
[INFO] [stdout]   --> src/game.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 | /         self.data
[INFO] [stdout] 69 | |             .chunks_mut(4)
[INFO] [stdout] 70 | |             .map(|mut row| {
[INFO] [stdout] 71 | |                 let (new_row, new_score) = match dir {
[INFO] [stdout] ...  |
[INFO] [stdout] 86 | |             })
[INFO] [stdout] 87 | |             .collect::<Vec<_>>();
[INFO] [stdout]    | |_________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.74s
[INFO] running `Command { std: "docker" "inspect" "6955546fa0d1c68c5221e6861921f627149c2c1c66ee5ab8ff77360b73429fb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6955546fa0d1c68c5221e6861921f627149c2c1c66ee5ab8ff77360b73429fb8", kill_on_drop: false }`
[INFO] [stdout] 6955546fa0d1c68c5221e6861921f627149c2c1c66ee5ab8ff77360b73429fb8
