[INFO] cloning repository https://github.com/seungha-kim/rust-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/seungha-kim/rust-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseungha-kim%2Frust-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseungha-kim%2Frust-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0d68a9bf554865f68025307033b6466798698d7d
[INFO] testing seungha-kim/rust-practice against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseungha-kim%2Frust-practice" "/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/seungha-kim/rust-practice on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/seungha-kim/rust-practice
[INFO] finished tweaking git repo https://github.com/seungha-kim/rust-practice
[INFO] tweaked toml for git repo https://github.com/seungha-kim/rust-practice written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/seungha-kim/rust-practice already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] 7f5f4522e410f9fe1f01f0fb509dc8f0166694c19b672c573868a72ab8b05af4
[INFO] running `Command { std: "docker" "start" "-a" "7f5f4522e410f9fe1f01f0fb509dc8f0166694c19b672c573868a72ab8b05af4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f5f4522e410f9fe1f01f0fb509dc8f0166694c19b672c573868a72ab8b05af4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f5f4522e410f9fe1f01f0fb509dc8f0166694c19b672c573868a72ab8b05af4", kill_on_drop: false }`
[INFO] [stdout] 7f5f4522e410f9fe1f01f0fb509dc8f0166694c19b672c573868a72ab8b05af4
[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=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" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3af0c2232cc1a9abfb271825e1611e3c28cdd4109bed8b61c2b98a7166445ab1
[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" "3af0c2232cc1a9abfb271825e1611e3c28cdd4109bed8b61c2b98a7166445ab1", kill_on_drop: false }`
[INFO] [stderr]    Compiling snakehead v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.72s
[INFO] running `Command { std: "docker" "inspect" "3af0c2232cc1a9abfb271825e1611e3c28cdd4109bed8b61c2b98a7166445ab1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3af0c2232cc1a9abfb271825e1611e3c28cdd4109bed8b61c2b98a7166445ab1", kill_on_drop: false }`
[INFO] [stdout] 3af0c2232cc1a9abfb271825e1611e3c28cdd4109bed8b61c2b98a7166445ab1
[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=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" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b4ace2322a4a61dfd9b9fd67e042e50d838494719829442f1b6cc9c7bf563d5
[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" "9b4ace2322a4a61dfd9b9fd67e042e50d838494719829442f1b6cc9c7bf563d5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling snakehead v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.59s
[INFO] running `Command { std: "docker" "inspect" "9b4ace2322a4a61dfd9b9fd67e042e50d838494719829442f1b6cc9c7bf563d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b4ace2322a4a61dfd9b9fd67e042e50d838494719829442f1b6cc9c7bf563d5", kill_on_drop: false }`
[INFO] [stdout] 9b4ace2322a4a61dfd9b9fd67e042e50d838494719829442f1b6cc9c7bf563d5
[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=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" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b927b3ca555cbd95ff733adea3105ca19622909071852c9b022aad81d911bea7
[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" "b927b3ca555cbd95ff733adea3105ca19622909071852c9b022aad81d911bea7", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stdout] running 22 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/snakehead-c62a964c21e86d3b
[INFO] [stdout] test closure::mutandonce::tests::capture_test ... ok
[INFO] [stdout] test closure::mutandonce::tests::memo_copy_works ... ok
[INFO] [stdout] test closure::mutandonce::tests::memo ... ok
[INFO] [stdout] test collections::vec::tests::vec_ownership ... ok
[INFO] [stdout] test copy::copy::tests::copy_works ... ok
[INFO] [stdout] test closure::mutandonce::tests::works ... ok
[INFO] [stdout] test smart::list::tests::list_works ... ok
[INFO] [stdout] test closure::mutandonce::tests::works2 ... ok
[INFO] [stdout] test smart::tests::test ... ok
[INFO] [stdout] test smart::tests::deref_coercion ... ok
[INFO] [stdout] test traits::largest::tests::largest_works ... ok
[INFO] [stdout] test collections::vec::tests::add_works ... ok
[INFO] [stdout] test traits::largest::tests::largest_ref_works ... ok
[INFO] [stdout] test collections::string::tests::string_plus ... ok
[INFO] [stdout] test closure::mutandonce::tests::memo_drop_works1 ... ok
[INFO] [stdout] test copy::copy::tests::reference_is_copiable2 ... ok
[INFO] [stdout] test copy::copy::tests::reference_is_copiable ... ok
[INFO] [stdout] test collections::vec::tests::vec_get ... ok
[INFO] [stdout] test lifetime::longest::tests::longest_workd ... ok
[INFO] [stdout] test collections::vec::tests::vec_mut_el ... ok
[INFO] [stdout] test copy::copy::tests::drop_works ... ok
[INFO] [stdout] test closure::mutandonce::tests::memo_drop_works2 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/snakehead-bbd4584e58b5275e
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests snakehead
[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] [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" "b927b3ca555cbd95ff733adea3105ca19622909071852c9b022aad81d911bea7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b927b3ca555cbd95ff733adea3105ca19622909071852c9b022aad81d911bea7", kill_on_drop: false }`
[INFO] [stdout] b927b3ca555cbd95ff733adea3105ca19622909071852c9b022aad81d911bea7