[INFO] fetching crate game-2048 0.5.1...
[INFO] testing game-2048-0.5.1 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate game-2048 0.5.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate game-2048 0.5.1 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", 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-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded matrix_display v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2927a69c035c796c3c1e8c471679b2f66acc38bbf41c87fc048516871bbb2fd1
[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" "2927a69c035c796c3c1e8c471679b2f66acc38bbf41c87fc048516871bbb2fd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2927a69c035c796c3c1e8c471679b2f66acc38bbf41c87fc048516871bbb2fd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2927a69c035c796c3c1e8c471679b2f66acc38bbf41c87fc048516871bbb2fd1", kill_on_drop: false }`
[INFO] [stdout] 2927a69c035c796c3c1e8c471679b2f66acc38bbf41c87fc048516871bbb2fd1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75db0a7ec62a7f04f35a4cd0733f8e01a902c4a1463760708829d37fe88a2604
[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" "75db0a7ec62a7f04f35a4cd0733f8e01a902c4a1463760708829d37fe88a2604", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling termion v1.5.5
[INFO] [stderr]    Compiling matrix_display v0.3.0
[INFO] [stderr]    Compiling 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: 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: 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]    = 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: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.55s
[INFO] running `Command { std: "docker" "inspect" "75db0a7ec62a7f04f35a4cd0733f8e01a902c4a1463760708829d37fe88a2604", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75db0a7ec62a7f04f35a4cd0733f8e01a902c4a1463760708829d37fe88a2604", kill_on_drop: false }`
[INFO] [stdout] 75db0a7ec62a7f04f35a4cd0733f8e01a902c4a1463760708829d37fe88a2604
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 350da2a31a57fffc77d8a108e9537f2dea1349c4b43bd339f66a2f78ffeea55c
[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" "350da2a31a57fffc77d8a108e9537f2dea1349c4b43bd339f66a2f78ffeea55c", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 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: 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]    = 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: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "350da2a31a57fffc77d8a108e9537f2dea1349c4b43bd339f66a2f78ffeea55c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "350da2a31a57fffc77d8a108e9537f2dea1349c4b43bd339f66a2f78ffeea55c", kill_on_drop: false }`
[INFO] [stdout] 350da2a31a57fffc77d8a108e9537f2dea1349c4b43bd339f66a2f78ffeea55c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 54f1a7e23344f9e2eb2cc2d628d46dda08ac1fd2184eb821ace67196850ca238
[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" "54f1a7e23344f9e2eb2cc2d628d46dda08ac1fd2184eb821ace67196850ca238", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated function `rand::sample`: renamed to seq::sample_iter
[INFO] [stderr]  --> src/board.rs:3:24
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::{thread_rng, sample};
[INFO] [stderr]   |                        ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated function `rand::sample`: renamed to seq::sample_iter
[INFO] [stderr]   --> src/board.rs:57:22
[INFO] [stderr]    |
[INFO] [stderr] 57 |         let mut fw = sample(&mut rng, 1..256, 17);
[INFO] [stderr]    |                      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: floating-point types cannot be used in patterns
[INFO] [stderr]   --> src/board.rs:22:22
[INFO] [stderr]    |
[INFO] [stderr] 22 |                      1_f64 => (".".to_string(), col),
[INFO] [stderr]    |                      ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(illegal_floating_point_literal_pattern)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
[INFO] [stderr] 
[INFO] [stderr] warning: floating-point types cannot be used in patterns
[INFO] [stderr]   --> src/board.rs:22:22
[INFO] [stderr]    |
[INFO] [stderr] 22 |                      1_f64 => (".".to_string(), col),
[INFO] [stderr]    |                      ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #41620 <https://github.com/rust-lang/rust/issues/41620>
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/game.rs:70:19
[INFO] [stderr]    |
[INFO] [stderr] 70 |             .map(|mut row| {
[INFO] [stderr]    |                   ----^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `collect` that must be used
[INFO] [stderr]   --> src/game.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 | /         self.data
[INFO] [stderr] 69 | |             .chunks_mut(4)
[INFO] [stderr] 70 | |             .map(|mut row| {
[INFO] [stderr] 71 | |                 let (new_row, new_score) = match dir {
[INFO] [stderr] ...  |
[INFO] [stderr] 86 | |             })
[INFO] [stderr] 87 | |             .collect::<Vec<_>>();
[INFO] [stderr]    | |_________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/game_2048-40bf58993cf687c7
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_four_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_four_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_four_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_four_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_one_element ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_three_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_three_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_two_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_two_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_three_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_two_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_two_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_one_element ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_three_different_elements ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "54f1a7e23344f9e2eb2cc2d628d46dda08ac1fd2184eb821ace67196850ca238", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54f1a7e23344f9e2eb2cc2d628d46dda08ac1fd2184eb821ace67196850ca238", kill_on_drop: false }`
[INFO] [stdout] 54f1a7e23344f9e2eb2cc2d628d46dda08ac1fd2184eb821ace67196850ca238
