[INFO] cloning repository https://github.com/rust-zh/faq
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-zh/faq" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-zh%2Ffaq", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-zh%2Ffaq'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 825005579400432c8e541cfa8469fb5eb8345861
[INFO] documenting rust-zh/faq 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%2Frust-zh%2Ffaq" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-zh/faq 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/rust-zh/faq
[INFO] finished tweaking git repo https://github.com/rust-zh/faq
[INFO] tweaked toml for git repo https://github.com/rust-zh/faq written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-zh/faq 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 v_escape_derive v0.8.1
[INFO] [stderr]   Downloaded buf-min v0.1.1
[INFO] [stderr]   Downloaded v_escape v0.12.1
[INFO] [stderr]   Downloaded v_htmlescape v0.10.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stdout] 8b807ea6cfcafa35e415d31036dffa6b8744ac8c0180883928d254549ad38d56
[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" "8b807ea6cfcafa35e415d31036dffa6b8744ac8c0180883928d254549ad38d56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b807ea6cfcafa35e415d31036dffa6b8744ac8c0180883928d254549ad38d56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b807ea6cfcafa35e415d31036dffa6b8744ac8c0180883928d254549ad38d56", kill_on_drop: false }`
[INFO] [stdout] 8b807ea6cfcafa35e415d31036dffa6b8744ac8c0180883928d254549ad38d56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] c5a9bece7dce4a472a5f7a8e155426fc7dee504a064a9f85272c5a34e790609f
[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" "c5a9bece7dce4a472a5f7a8e155426fc7dee504a064a9f85272c5a34e790609f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling v_escape v0.12.1
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]    Compiling v_htmlescape v0.10.0
[INFO] [stderr]     Checking quick-error v2.0.0
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling onig_sys v69.5.0
[INFO] [stderr]     Checking line-wrap v0.1.1
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking buf-min v0.1.1
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling v_escape_derive v0.8.1
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking onig v6.0.0
[INFO] [stderr]     Checking serde v1.0.115
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking plist v1.0.0
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking syntect v4.4.0
[INFO] [stderr]     Checking handlebars v3.4.0
[INFO] [stderr]  Documenting rust-zh-faq v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 54.74s
[INFO] running `Command { std: "docker" "inspect" "c5a9bece7dce4a472a5f7a8e155426fc7dee504a064a9f85272c5a34e790609f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5a9bece7dce4a472a5f7a8e155426fc7dee504a064a9f85272c5a34e790609f", kill_on_drop: false }`
[INFO] [stdout] c5a9bece7dce4a472a5f7a8e155426fc7dee504a064a9f85272c5a34e790609f