[INFO] cloning repository https://github.com/ptasz3k/md-link-check
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ptasz3k/md-link-check" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fptasz3k%2Fmd-link-check", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fptasz3k%2Fmd-link-check'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 383959a5c8167774b06f48bf558361991599f72d
[INFO] documenting ptasz3k/md-link-check against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fptasz3k%2Fmd-link-check" "/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/ptasz3k/md-link-check on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ptasz3k/md-link-check
[INFO] finished tweaking git repo https://github.com/ptasz3k/md-link-check
[INFO] tweaked toml for git repo https://github.com/ptasz3k/md-link-check written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/ptasz3k/md-link-check already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded console v0.11.2
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "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] cdb5594e0fbb34b833bbacc4546273f12516a6ea9200164db4f6c1c8dd085406
[INFO] running `Command { std: "docker" "start" "-a" "cdb5594e0fbb34b833bbacc4546273f12516a6ea9200164db4f6c1c8dd085406", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cdb5594e0fbb34b833bbacc4546273f12516a6ea9200164db4f6c1c8dd085406", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdb5594e0fbb34b833bbacc4546273f12516a6ea9200164db4f6c1c8dd085406", kill_on_drop: false }`
[INFO] [stdout] cdb5594e0fbb34b833bbacc4546273f12516a6ea9200164db4f6c1c8dd085406
[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" "RUSTDOCFLAGS=--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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b5f7c40145088f6c84987c84e269fb2da91f460cedd9a827ef78d8ad623fc873
[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" "b5f7c40145088f6c84987c84e269fb2da91f460cedd9a827ef78d8ad623fc873", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.13
[INFO] [stderr]    Compiling syn v1.0.22
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]    Compiling pulldown-cmark v0.7.1
[INFO] [stderr]     Checking os_str_bytes v2.3.1
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking termios v0.3.2
[INFO] [stderr]     Checking terminal_size v0.1.12
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking tokio v0.2.21
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking console v0.11.2
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.16
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.1
[INFO] [stderr]     Checking pin-project v0.4.16
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking clap v3.0.0-beta.1
[INFO] [stderr]     Checking h2 v0.2.5
[INFO] [stderr]     Checking hyper v0.13.5
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.4
[INFO] [stderr]  Documenting md-link-check v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 58.91s
[INFO] running `Command { std: "docker" "inspect" "b5f7c40145088f6c84987c84e269fb2da91f460cedd9a827ef78d8ad623fc873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5f7c40145088f6c84987c84e269fb2da91f460cedd9a827ef78d8ad623fc873", kill_on_drop: false }`
[INFO] [stdout] b5f7c40145088f6c84987c84e269fb2da91f460cedd9a827ef78d8ad623fc873