[INFO] cloning repository https://github.com/FuGangqiang/RustPractices
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FuGangqiang/RustPractices" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFuGangqiang%2FRustPractices", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFuGangqiang%2FRustPractices'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1070eb7e8aae9e6b1169a56192248a14086a5bdb
[INFO] testing FuGangqiang/RustPractices against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFuGangqiang%2FRustPractices" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FuGangqiang/RustPractices on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/FuGangqiang/RustPractices
[INFO] finished tweaking git repo https://github.com/FuGangqiang/RustPractices
[INFO] tweaked toml for git repo https://github.com/FuGangqiang/RustPractices written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/FuGangqiang/RustPractices already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94b2036e1c4a2cb7f873a05801cd3c6038591450e6cef244b4c1e6f6cef6b38f
[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" "94b2036e1c4a2cb7f873a05801cd3c6038591450e6cef244b4c1e6f6cef6b38f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94b2036e1c4a2cb7f873a05801cd3c6038591450e6cef244b4c1e6f6cef6b38f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94b2036e1c4a2cb7f873a05801cd3c6038591450e6cef244b4c1e6f6cef6b38f", kill_on_drop: false }`
[INFO] [stdout] 94b2036e1c4a2cb7f873a05801cd3c6038591450e6cef244b4c1e6f6cef6b38f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e13bd44955ea793c4c0f8bb77476f16b80ebec4f6feb3cfc90850566be8b49e
[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" "1e13bd44955ea793c4c0f8bb77476f16b80ebec4f6feb3cfc90850566be8b49e", kill_on_drop: false }`
[INFO] [stderr]    Compiling practices v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.34s
[INFO] running `Command { std: "docker" "inspect" "1e13bd44955ea793c4c0f8bb77476f16b80ebec4f6feb3cfc90850566be8b49e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e13bd44955ea793c4c0f8bb77476f16b80ebec4f6feb3cfc90850566be8b49e", kill_on_drop: false }`
[INFO] [stdout] 1e13bd44955ea793c4c0f8bb77476f16b80ebec4f6feb3cfc90850566be8b49e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8246895192e653e94fd4fd28f9cd2c3d1ba7b362ecbf2ad77ad338894ae834f
[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" "b8246895192e653e94fd4fd28f9cd2c3d1ba7b362ecbf2ad77ad338894ae834f", kill_on_drop: false }`
[INFO] [stderr]    Compiling practices v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.14s
[INFO] running `Command { std: "docker" "inspect" "b8246895192e653e94fd4fd28f9cd2c3d1ba7b362ecbf2ad77ad338894ae834f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8246895192e653e94fd4fd28f9cd2c3d1ba7b362ecbf2ad77ad338894ae834f", kill_on_drop: false }`
[INFO] [stdout] b8246895192e653e94fd4fd28f9cd2c3d1ba7b362ecbf2ad77ad338894ae834f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", 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] d8f129cd3067b1bee294cf5fe4d0e1e9bba11b125c6a68da6d4df06ce1b5d6c2
[INFO] running `Command { std: "docker" "start" "-a" "d8f129cd3067b1bee294cf5fe4d0e1e9bba11b125c6a68da6d4df06ce1b5d6c2", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/practices-d80a98510a80d3c0
[INFO] [stdout] 
[INFO] [stdout] running 50 tests
[INFO] [stdout] test clrs::max_subarray::tests::test_find_max_subarray_iterative ... ok
[INFO] [stdout] test clrs::max_subarray::tests::test_find_max_subarray_recursive ... ok
[INFO] [stdout] test clrs::two_sum::tests::test_two_sum ... ok
[INFO] [stdout] test sorting::bubble_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::bubble_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::bubble_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::heap_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::bucket_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::bucket_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::bucket_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::insert_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::insert_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::merge_sort::tests::test_even_sort ... ok
[INFO] [stdout] test sorting::heap_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::insert_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::counting_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::heap_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::counting_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::merge_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::merge_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::merge_sort::tests::test_odd_sort ... ok
[INFO] [stdout] test sorting::selection_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::shell_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::selection_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::quick_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::quick_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::selection_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::quick_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::shell_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::counting_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::radix_sort::tests::test_empty ... ok
[INFO] [stdout] test structure::deque::test::basics ... ok
[INFO] [stdout] test structure::deque::test::peek ... ok
[INFO] [stdout] test structure::list::test::basics ... ok
[INFO] [stdout] test structure::max_heap::tests::test_push_pop ... ok
[INFO] [stdout] test structure::list::test::iter ... ok
[INFO] [stdout] test sorting::shell_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::radix_sort::tests::test_one_element ... ok
[INFO] [stdout] test structure::min_heap::tests::test_push_pop ... ok
[INFO] [stdout] test structure::deque::test::into_iter ... ok
[INFO] [stdout] test structure::max_heap::tests::test_new ... ok
[INFO] [stdout] test structure::unsafe_deque::test::basics ... ok
[INFO] [stdout] test structure::min_heap::tests::test_new ... ok
[INFO] [stdout] test sorting::radix_sort::tests::test_sort ... ok
[INFO] [stdout] test structure::unsafe_deque::test::peek ... ok
[INFO] [stdout] test structure::unsafe_stack::test::basics ... ok
[INFO] [stdout] test structure::unsafe_red_black_tree::tests::test_get ... ok
[INFO] [stdout] test structure::unsafe_red_black_tree::tests::test_inorder_tree_walk_2 ... ok
[INFO] [stdout] test structure::unsafe_red_black_tree::tests::test_inorder_tree_walk_1 ... ok
[INFO] [stdout] test structure::unsafe_deque::test::into_iter ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 50 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.18s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests practices
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d8f129cd3067b1bee294cf5fe4d0e1e9bba11b125c6a68da6d4df06ce1b5d6c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8f129cd3067b1bee294cf5fe4d0e1e9bba11b125c6a68da6d4df06ce1b5d6c2", kill_on_drop: false }`
[INFO] [stdout] d8f129cd3067b1bee294cf5fe4d0e1e9bba11b125c6a68da6d4df06ce1b5d6c2