[INFO] updating cached repository https://github.com/ddefrenne/battleship
[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] a80a793b47a6039c462dba8e442ae1ea489828d8
[INFO] testing ddefrenne/battleship 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%2Fddefrenne%2Fbattleship" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ddefrenne/battleship 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/ddefrenne/battleship
[INFO] finished tweaking git repo https://github.com/ddefrenne/battleship
[INFO] tweaked toml for git repo https://github.com/ddefrenne/battleship written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ddefrenne/battleship 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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 4a51ca9ce7f8f6fde5875faa3bbc744df1d5f6f4605a989f8d10b52edd91aaf5
[INFO] running `Command { std: "docker" "start" "-a" "4a51ca9ce7f8f6fde5875faa3bbc744df1d5f6f4605a989f8d10b52edd91aaf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a51ca9ce7f8f6fde5875faa3bbc744df1d5f6f4605a989f8d10b52edd91aaf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a51ca9ce7f8f6fde5875faa3bbc744df1d5f6f4605a989f8d10b52edd91aaf5", kill_on_drop: false }`
[INFO] [stdout] 4a51ca9ce7f8f6fde5875faa3bbc744df1d5f6f4605a989f8d10b52edd91aaf5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] f452ef89bf1ea599f6b7012c42e4a3f43ff47d3ab8c3ab84110971cb40193931
[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" "f452ef89bf1ea599f6b7012c42e4a3f43ff47d3ab8c3ab84110971cb40193931", kill_on_drop: false }`
[INFO] [stderr]    Compiling battleship v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/main.rs:19:19
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for column in (1..amount_of_columns + 1) {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grid`
[INFO] [stdout]  --> src/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let grid = build_grid(&rows, amount_of_columns);
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rows`
[INFO] [stdout]  --> src/main.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn build_grid(rows: &[char; 10], amount_of_columns: i32) {
[INFO] [stdout]   |               ^^^^ help: if this is intentional, prefix it with an underscore: `_rows`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "f452ef89bf1ea599f6b7012c42e4a3f43ff47d3ab8c3ab84110971cb40193931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f452ef89bf1ea599f6b7012c42e4a3f43ff47d3ab8c3ab84110971cb40193931", kill_on_drop: false }`
[INFO] [stdout] f452ef89bf1ea599f6b7012c42e4a3f43ff47d3ab8c3ab84110971cb40193931
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 0744596f63175912d5f345786c8b35d59b5408c7f6522e10ffc94bf39a25487d
[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" "0744596f63175912d5f345786c8b35d59b5408c7f6522e10ffc94bf39a25487d", kill_on_drop: false }`
[INFO] [stderr]    Compiling battleship v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/main.rs:19:19
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for column in (1..amount_of_columns + 1) {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grid`
[INFO] [stdout]  --> src/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let grid = build_grid(&rows, amount_of_columns);
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rows`
[INFO] [stdout]  --> src/main.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn build_grid(rows: &[char; 10], amount_of_columns: i32) {
[INFO] [stdout]   |               ^^^^ help: if this is intentional, prefix it with an underscore: `_rows`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "0744596f63175912d5f345786c8b35d59b5408c7f6522e10ffc94bf39a25487d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0744596f63175912d5f345786c8b35d59b5408c7f6522e10ffc94bf39a25487d", kill_on_drop: false }`
[INFO] [stdout] 0744596f63175912d5f345786c8b35d59b5408c7f6522e10ffc94bf39a25487d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] daf19b22dafffa16ae44d6fd82b7766d327794369150f86cac3d5cc738603695
[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" "daf19b22dafffa16ae44d6fd82b7766d327794369150f86cac3d5cc738603695", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]   --> src/main.rs:19:19
[INFO] [stderr]    |
[INFO] [stderr] 19 |     for column in (1..amount_of_columns + 1) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `grid`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let grid = build_grid(&rows, amount_of_columns);
[INFO] [stderr]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rows`
[INFO] [stderr]  --> src/main.rs:8:15
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn build_grid(rows: &[char; 10], amount_of_columns: i32) {
[INFO] [stderr]   |               ^^^^ help: if this is intentional, prefix it with an underscore: `_rows`
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/battleship-18d82cee8d924c67
[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" "daf19b22dafffa16ae44d6fd82b7766d327794369150f86cac3d5cc738603695", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "daf19b22dafffa16ae44d6fd82b7766d327794369150f86cac3d5cc738603695", kill_on_drop: false }`
[INFO] [stdout] daf19b22dafffa16ae44d6fd82b7766d327794369150f86cac3d5cc738603695