[INFO] updating cached repository https://github.com/swizzard/rust-mazes
[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] 46d2f9f69c6ba91b75dab043e72d95d8953a9c8c
[INFO] testing swizzard/rust-mazes 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%2Fswizzard%2Frust-mazes" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/swizzard/rust-mazes 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/swizzard/rust-mazes
[INFO] finished tweaking git repo https://github.com/swizzard/rust-mazes
[INFO] tweaked toml for git repo https://github.com/swizzard/rust-mazes written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/swizzard/rust-mazes 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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] b0923f518d1c0d36b29934c054301b967d3d0f78981f801f561f755f44a64bfa
[INFO] running `Command { std: "docker" "start" "-a" "b0923f518d1c0d36b29934c054301b967d3d0f78981f801f561f755f44a64bfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0923f518d1c0d36b29934c054301b967d3d0f78981f801f561f755f44a64bfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0923f518d1c0d36b29934c054301b967d3d0f78981f801f561f755f44a64bfa", kill_on_drop: false }`
[INFO] [stdout] b0923f518d1c0d36b29934c054301b967d3d0f78981f801f561f755f44a64bfa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 253e965cda92f9db0205e05c804cef5ef90350613336089ae090e5abe76c6e8b
[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" "253e965cda92f9db0205e05c804cef5ef90350613336089ae090e5abe76c6e8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling mazes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.05s
[INFO] running `Command { std: "docker" "inspect" "253e965cda92f9db0205e05c804cef5ef90350613336089ae090e5abe76c6e8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "253e965cda92f9db0205e05c804cef5ef90350613336089ae090e5abe76c6e8b", kill_on_drop: false }`
[INFO] [stdout] 253e965cda92f9db0205e05c804cef5ef90350613336089ae090e5abe76c6e8b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 104d75092c3da823b94f7db247ea7c2cf18cf5e6fcbd001b540979b26f6d5416
[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" "104d75092c3da823b94f7db247ea7c2cf18cf5e6fcbd001b540979b26f6d5416", kill_on_drop: false }`
[INFO] [stderr]    Compiling mazes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/maze.rs:302:21
[INFO] [stdout]     |
[INFO] [stdout] 302 |             assert!(c.loc.column >= 0);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/maze.rs:304:21
[INFO] [stdout]     |
[INFO] [stdout] 304 |             assert!(c.loc.column >= 0);
[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 1.79s
[INFO] running `Command { std: "docker" "inspect" "104d75092c3da823b94f7db247ea7c2cf18cf5e6fcbd001b540979b26f6d5416", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "104d75092c3da823b94f7db247ea7c2cf18cf5e6fcbd001b540979b26f6d5416", kill_on_drop: false }`
[INFO] [stdout] 104d75092c3da823b94f7db247ea7c2cf18cf5e6fcbd001b540979b26f6d5416
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] d2bc1cf9342abb112aa1ead9aa7551f850c301c647e613140cbd2a3e8e9e463f
[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" "d2bc1cf9342abb112aa1ead9aa7551f850c301c647e613140cbd2a3e8e9e463f", kill_on_drop: false }`
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/maze.rs:302:21
[INFO] [stderr]     |
[INFO] [stderr] 302 |             assert!(c.loc.column >= 0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/maze.rs:304:21
[INFO] [stderr]     |
[INFO] [stderr] 304 |             assert!(c.loc.column >= 0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mazes-c44a2b3394786f40
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test maze::test::each_cell_iter ... ok
[INFO] [stdout] test maze::test::add_neighbor ... ok
[INFO] [stdout] test cell::test::calc_dir ... ok
[INFO] [stdout] test maze::test::each_col_iter ... ok
[INFO] [stdout] test maze::test::each_row_iter ... ok
[INFO] [stdout] test maze::test::rand_cell_iter ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mazes-ea2ef963f73f47cd
[INFO] [stdout] test cell::test::calc_dir_bad ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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] [stderr]    Doc-tests mazes
[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" "d2bc1cf9342abb112aa1ead9aa7551f850c301c647e613140cbd2a3e8e9e463f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2bc1cf9342abb112aa1ead9aa7551f850c301c647e613140cbd2a3e8e9e463f", kill_on_drop: false }`
[INFO] [stdout] d2bc1cf9342abb112aa1ead9aa7551f850c301c647e613140cbd2a3e8e9e463f