[INFO] updating cached repository https://github.com/bolstycjw/black-widow
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a0a3c3d6a796c2dd373ca87edd18ff5d15796d55
[INFO] checking bolstycjw/black-widow against master#bd0bacc694d7d8175804bb6f690cb846bfa4a9ee for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbolstycjw%2Fblack-widow" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bolstycjw/black-widow on toolchain bd0bacc694d7d8175804bb6f690cb846bfa4a9ee
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/bolstycjw/black-widow
[INFO] finished tweaking git repo https://github.com/bolstycjw/black-widow
[INFO] tweaked toml for git repo https://github.com/bolstycjw/black-widow written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/bolstycjw/black-widow already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 04f04ccf2745432a9012e9f7939b376bbe91355314f47f0c17c3c0b602ca5fcf
[INFO] running `"docker" "start" "-a" "04f04ccf2745432a9012e9f7939b376bbe91355314f47f0c17c3c0b602ca5fcf"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling openssl v0.10.26
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking smallvec v1.1.0
[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]    Compiling encoding_rs v0.8.22
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking http v0.2.0
[INFO] [stderr]    Compiling indexmap v1.3.1
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]     Checking unicode-normalization v0.1.11
[INFO] [stderr]     Checking tendril v0.4.1
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]    Compiling openssl-sys v0.9.53
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]    Compiling mime_guess v2.0.1
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling tokio-macros v0.2.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.6
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]     Checking tokio v0.2.9
[INFO] [stderr]     Checking pin-project v0.4.6
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]     Checking hyper v0.13.1
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking string_cache v0.8.0
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking reqwest v0.10.1
[INFO] [stderr]    Compiling markup5ever v0.10.0
[INFO] [stderr]     Checking xml5ever v0.16.1
[INFO] [stderr]     Checking markup5ever_rcdom v0.1.0
[INFO] [stderr]     Checking black-widow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/crawler.rs:138:13
[INFO] [stderr]     |
[INFO] [stderr] 138 |             crawl_worker_thread(&domain, to_visit, visited, active_count, tx, link_data);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/crawler.rs:138:13
[INFO] [stderr]     |
[INFO] [stderr] 138 |             crawl_worker_thread(&domain, to_visit, visited, active_count, tx, link_data);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 42s
[INFO] running `"docker" "inspect" "04f04ccf2745432a9012e9f7939b376bbe91355314f47f0c17c3c0b602ca5fcf"`
[INFO] running `"docker" "rm" "-f" "04f04ccf2745432a9012e9f7939b376bbe91355314f47f0c17c3c0b602ca5fcf"`
[INFO] [stdout] 04f04ccf2745432a9012e9f7939b376bbe91355314f47f0c17c3c0b602ca5fcf