[INFO] updating cached repository https://github.com/Mortal/rs2048
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e3c7d43cbaae860c845540a95f4447351f60670c
[INFO] testing Mortal/rs2048 against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMortal%2Frs2048" "/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/Mortal/rs2048 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Mortal/rs2048
[INFO] finished tweaking git repo https://github.com/Mortal/rs2048
[INFO] tweaked toml for git repo https://github.com/Mortal/rs2048 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Mortal/rs2048 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "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] 7d1530d618958d1eb8b3158177aa4fe0282f88c3eccce344545250683f5c513b
[INFO] running `Command { std: "docker" "start" "-a" "7d1530d618958d1eb8b3158177aa4fe0282f88c3eccce344545250683f5c513b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d1530d618958d1eb8b3158177aa4fe0282f88c3eccce344545250683f5c513b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d1530d618958d1eb8b3158177aa4fe0282f88c3eccce344545250683f5c513b", kill_on_drop: false }`
[INFO] [stdout] 7d1530d618958d1eb8b3158177aa4fe0282f88c3eccce344545250683f5c513b
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0af1fbe3813af9bee346228ebfa0e0e3fcf7c8b341fdd46dc303eb3f6455bce
[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" "e0af1fbe3813af9bee346228ebfa0e0e3fcf7c8b341fdd46dc303eb3f6455bce", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling rs2048 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `count_empty`
[INFO] [stdout]   --> src/board.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn count_empty(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_array`
[INFO] [stdout]    --> src/board.rs:206:12
[INFO] [stdout]     |
[INFO] [stdout] 206 |     pub fn from_array(tiles: [u8; 16]) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.89s
[INFO] running `Command { std: "docker" "inspect" "e0af1fbe3813af9bee346228ebfa0e0e3fcf7c8b341fdd46dc303eb3f6455bce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0af1fbe3813af9bee346228ebfa0e0e3fcf7c8b341fdd46dc303eb3f6455bce", kill_on_drop: false }`
[INFO] [stdout] e0af1fbe3813af9bee346228ebfa0e0e3fcf7c8b341fdd46dc303eb3f6455bce
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 72ce9fdb2f6ad88f0cf3bc296a622a255c81c3ac87b8bd7f154c4636b26e4f63
[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" "72ce9fdb2f6ad88f0cf3bc296a622a255c81c3ac87b8bd7f154c4636b26e4f63", kill_on_drop: false }`
[INFO] [stderr]    Compiling rs2048 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `count_empty`
[INFO] [stdout]   --> src/board.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn count_empty(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_array`
[INFO] [stdout]    --> src/board.rs:206:12
[INFO] [stdout]     |
[INFO] [stdout] 206 |     pub fn from_array(tiles: [u8; 16]) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "72ce9fdb2f6ad88f0cf3bc296a622a255c81c3ac87b8bd7f154c4636b26e4f63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72ce9fdb2f6ad88f0cf3bc296a622a255c81c3ac87b8bd7f154c4636b26e4f63", kill_on_drop: false }`
[INFO] [stdout] 72ce9fdb2f6ad88f0cf3bc296a622a255c81c3ac87b8bd7f154c4636b26e4f63
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f0690d3a34b5083c91ae77c7138e1b064a5b1e51cd682033800ad7c9d18df1ad
[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" "f0690d3a34b5083c91ae77c7138e1b064a5b1e51cd682033800ad7c9d18df1ad", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `count_empty`
[INFO] [stderr]   --> src/board.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn count_empty(&self) -> usize {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `from_array`
[INFO] [stderr]    --> src/board.rs:206:12
[INFO] [stderr]     |
[INFO] [stderr] 206 |     pub fn from_array(tiles: [u8; 16]) -> Self {
[INFO] [stderr]     |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rs2048-c8de09565869266d
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f0690d3a34b5083c91ae77c7138e1b064a5b1e51cd682033800ad7c9d18df1ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0690d3a34b5083c91ae77c7138e1b064a5b1e51cd682033800ad7c9d18df1ad", kill_on_drop: false }`
[INFO] [stdout] f0690d3a34b5083c91ae77c7138e1b064a5b1e51cd682033800ad7c9d18df1ad