[INFO] cloning repository https://github.com/llogiq/optional
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/llogiq/optional" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fllogiq%2Foptional", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fllogiq%2Foptional'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5105129555ea476a493ee4c5887b12cf71797dd3
[INFO] checking llogiq/optional against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fllogiq%2Foptional" "/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/llogiq/optional on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/llogiq/optional
[INFO] finished tweaking git repo https://github.com/llogiq/optional
[INFO] tweaked toml for git repo https://github.com/llogiq/optional written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/llogiq/optional already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9607e07f7900e7b70bb4d48a7dbaf9f20342bf72b9c3b07e6b0793c3833e9697
[INFO] running `Command { std: "docker" "start" "-a" "9607e07f7900e7b70bb4d48a7dbaf9f20342bf72b9c3b07e6b0793c3833e9697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9607e07f7900e7b70bb4d48a7dbaf9f20342bf72b9c3b07e6b0793c3833e9697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9607e07f7900e7b70bb4d48a7dbaf9f20342bf72b9c3b07e6b0793c3833e9697", kill_on_drop: false }`
[INFO] [stdout] 9607e07f7900e7b70bb4d48a7dbaf9f20342bf72b9c3b07e6b0793c3833e9697
[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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b20f06a5e26e163edea35ffae7ed21d709d0748317a7a69e0c46ceef3ee87f7
[INFO] running `Command { std: "docker" "start" "-a" "5b20f06a5e26e163edea35ffae7ed21d709d0748317a7a69e0c46ceef3ee87f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking optional v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.84s
[INFO] running `Command { std: "docker" "inspect" "5b20f06a5e26e163edea35ffae7ed21d709d0748317a7a69e0c46ceef3ee87f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b20f06a5e26e163edea35ffae7ed21d709d0748317a7a69e0c46ceef3ee87f7", kill_on_drop: false }`
[INFO] [stdout] 5b20f06a5e26e163edea35ffae7ed21d709d0748317a7a69e0c46ceef3ee87f7