[INFO] cloning repository https://github.com/pierrechevalier83/2048-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pierrechevalier83/2048-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpierrechevalier83%2F2048-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpierrechevalier83%2F2048-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8de61e8e0342d54b0ae44b937ecb3952c4d2a94c
[INFO] testing pierrechevalier83/2048-rs against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpierrechevalier83%2F2048-rs" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pierrechevalier83/2048-rs on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pierrechevalier83/2048-rs
[INFO] finished tweaking git repo https://github.com/pierrechevalier83/2048-rs
[INFO] tweaked toml for git repo https://github.com/pierrechevalier83/2048-rs written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/pierrechevalier83/2048-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clippy_lints v0.0.165
[INFO] [stderr]   Downloaded clippy v0.0.165
[INFO] [stderr]   Downloaded termion v1.2.0
[INFO] [stderr]   Downloaded num-bigint v0.1.36
[INFO] [stderr]   Downloaded matrix_display v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1aa0032222b1e697a6d9b84f796b2e46f9cbc9af0c013eb1584056e96e1dd5d0
[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" "1aa0032222b1e697a6d9b84f796b2e46f9cbc9af0c013eb1584056e96e1dd5d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1aa0032222b1e697a6d9b84f796b2e46f9cbc9af0c013eb1584056e96e1dd5d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1aa0032222b1e697a6d9b84f796b2e46f9cbc9af0c013eb1584056e96e1dd5d0", kill_on_drop: false }`
[INFO] [stdout] 1aa0032222b1e697a6d9b84f796b2e46f9cbc9af0c013eb1584056e96e1dd5d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0365073569f8582353d0e76bc4471193e56e3436a8760ba8f01bd6ef0d83c7b8
[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" "0365073569f8582353d0e76bc4471193e56e3436a8760ba8f01bd6ef0d83c7b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-segmentation v1.1.0
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling termion v1.2.0
[INFO] [stderr]    Compiling num-bigint v0.1.36
[INFO] [stderr]    Compiling num-complex v0.1.36
[INFO] [stderr]    Compiling matrix_display v0.3.0
[INFO] [stderr]    Compiling num-rational v0.1.36
[INFO] [stderr]    Compiling num v0.1.37
[INFO] [stderr]    Compiling game-2048 v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `collect` that must be used
[INFO] [stdout]   --> src/game.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 | /         self.data
[INFO] [stdout] 70 | |             .chunks_mut(4)
[INFO] [stdout] 71 | |             .map(|row| {
[INFO] [stdout] 72 | |                 let (new_row, new_score) = match dir {
[INFO] [stdout] ...  |
[INFO] [stdout] 87 | |             })
[INFO] [stdout] 88 | |             .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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.63s
[INFO] running `Command { std: "docker" "inspect" "0365073569f8582353d0e76bc4471193e56e3436a8760ba8f01bd6ef0d83c7b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0365073569f8582353d0e76bc4471193e56e3436a8760ba8f01bd6ef0d83c7b8", kill_on_drop: false }`
[INFO] [stdout] 0365073569f8582353d0e76bc4471193e56e3436a8760ba8f01bd6ef0d83c7b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 531f13198cba4556d55ce4b64da94b0e08c8b288d808bcb15530cd906e053e13
[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" "531f13198cba4556d55ce4b64da94b0e08c8b288d808bcb15530cd906e053e13", kill_on_drop: false }`
[INFO] [stderr]    Compiling game-2048 v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `collect` that must be used
[INFO] [stdout]   --> src/game.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 | /         self.data
[INFO] [stdout] 70 | |             .chunks_mut(4)
[INFO] [stdout] 71 | |             .map(|row| {
[INFO] [stdout] 72 | |                 let (new_row, new_score) = match dir {
[INFO] [stdout] ...  |
[INFO] [stdout] 87 | |             })
[INFO] [stdout] 88 | |             .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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.64s
[INFO] running `Command { std: "docker" "inspect" "531f13198cba4556d55ce4b64da94b0e08c8b288d808bcb15530cd906e053e13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "531f13198cba4556d55ce4b64da94b0e08c8b288d808bcb15530cd906e053e13", kill_on_drop: false }`
[INFO] [stdout] 531f13198cba4556d55ce4b64da94b0e08c8b288d808bcb15530cd906e053e13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7da2ea2f860166d05911725f9d593a579322913cbff072990ea7e0ab430126f7
[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" "7da2ea2f860166d05911725f9d593a579322913cbff072990ea7e0ab430126f7", kill_on_drop: false }`
[INFO] [stderr] warning: unused return value of `collect` that must be used
[INFO] [stderr]   --> src/game.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 | /         self.data
[INFO] [stderr] 70 | |             .chunks_mut(4)
[INFO] [stderr] 71 | |             .map(|row| {
[INFO] [stderr] 72 | |                 let (new_row, new_score) = match dir {
[INFO] [stderr] ...  |
[INFO] [stderr] 87 | |             })
[INFO] [stderr] 88 | |             .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: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/game_2048-45f1ac81c265dfd3
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_three_different_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_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_left_with_two_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_two_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_left_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_left_with_two_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_three_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_two_same_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" "7da2ea2f860166d05911725f9d593a579322913cbff072990ea7e0ab430126f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7da2ea2f860166d05911725f9d593a579322913cbff072990ea7e0ab430126f7", kill_on_drop: false }`
[INFO] [stdout] 7da2ea2f860166d05911725f9d593a579322913cbff072990ea7e0ab430126f7