[INFO] cloning repository https://github.com/alxolr/game_2048_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alxolr/game_2048_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falxolr%2Fgame_2048_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falxolr%2Fgame_2048_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a0b20d70cb4609d6c75b38b9fe18b8abf437b9c8
[INFO] testing alxolr/game_2048_rust against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falxolr%2Fgame_2048_rust" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alxolr/game_2048_rust on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alxolr/game_2048_rust
[INFO] finished tweaking git repo https://github.com/alxolr/game_2048_rust
[INFO] tweaked toml for git repo https://github.com/alxolr/game_2048_rust written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/alxolr/game_2048_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 26d84c594d354000be3dcd740d9237b03b17021b9ee95b3e804dfb8b093fbc21
[INFO] running `Command { std: "docker" "start" "-a" "26d84c594d354000be3dcd740d9237b03b17021b9ee95b3e804dfb8b093fbc21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26d84c594d354000be3dcd740d9237b03b17021b9ee95b3e804dfb8b093fbc21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26d84c594d354000be3dcd740d9237b03b17021b9ee95b3e804dfb8b093fbc21", kill_on_drop: false }`
[INFO] [stdout] 26d84c594d354000be3dcd740d9237b03b17021b9ee95b3e804dfb8b093fbc21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a5fe157b9f2c4c927c77c9582c9258ee19e5f2a2851a7c2c0d53d2ec5720d38
[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" "0a5fe157b9f2c4c927c77c9582c9258ee19e5f2a2851a7c2c0d53d2ec5720d38", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling getrandom v0.2.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling termion v1.5.5
[INFO] [stderr]    Compiling rand_core v0.6.0
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.0
[INFO] [stderr]    Compiling game_2048 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]    --> src/game.rs:212:17
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let mut result = String::new();
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.88s
[INFO] running `Command { std: "docker" "inspect" "0a5fe157b9f2c4c927c77c9582c9258ee19e5f2a2851a7c2c0d53d2ec5720d38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a5fe157b9f2c4c927c77c9582c9258ee19e5f2a2851a7c2c0d53d2ec5720d38", kill_on_drop: false }`
[INFO] [stdout] 0a5fe157b9f2c4c927c77c9582c9258ee19e5f2a2851a7c2c0d53d2ec5720d38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93000716bc047327da84d7fc4856d896915848e9bd75db0b7055754f47300a50
[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" "93000716bc047327da84d7fc4856d896915848e9bd75db0b7055754f47300a50", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling game_2048 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]    --> src/game.rs:212:17
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let mut result = String::new();
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.65s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "93000716bc047327da84d7fc4856d896915848e9bd75db0b7055754f47300a50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93000716bc047327da84d7fc4856d896915848e9bd75db0b7055754f47300a50", kill_on_drop: false }`
[INFO] [stdout] 93000716bc047327da84d7fc4856d896915848e9bd75db0b7055754f47300a50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ac249f40012519c9a6856effc67c981116fed26e98fa11c2bba999e1a118ef5d
[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" "ac249f40012519c9a6856effc67c981116fed26e98fa11c2bba999e1a118ef5d", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stdout] running 5 tests
[INFO] [stderr]    --> src/game.rs:212:17
[INFO] [stdout] test game::tests::when_run_down_it_should_compute_and_move_everything_down ... ok
[INFO] [stderr]     |
[INFO] [stdout] test game::tests::when_run_left_it_should_compute_and_move_everything_left ... ok
[INFO] [stderr] 212 |         let mut result = String::new();
[INFO] [stdout] test game::tests::when_run_right_should_compute_and_move_everything_right ... ok
[INFO] [stderr]     |                 ^^^^^^
[INFO] [stdout] test game::tests::when_run_up_and_there_is_a_double_it_should_be_summed_and_moved_up ... ok
[INFO] [stderr]     |
[INFO] [stdout] test game::tests::when_run_up_should_move_everything_in_upper_row ... ok
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: `game_2048` (bin "game_2048" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/game_2048-5599125d274da430)
[INFO] running `Command { std: "docker" "inspect" "ac249f40012519c9a6856effc67c981116fed26e98fa11c2bba999e1a118ef5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac249f40012519c9a6856effc67c981116fed26e98fa11c2bba999e1a118ef5d", kill_on_drop: false }`
[INFO] [stdout] ac249f40012519c9a6856effc67c981116fed26e98fa11c2bba999e1a118ef5d