[INFO] cloning repository https://github.com/jeanguyomarch/mktcb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeanguyomarch/mktcb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeanguyomarch%2Fmktcb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeanguyomarch%2Fmktcb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9dda57630e4e59c2f905f82f7c98abf7f7d720cb
[INFO] documenting jeanguyomarch/mktcb against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeanguyomarch%2Fmktcb" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeanguyomarch/mktcb on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jeanguyomarch/mktcb
[INFO] finished tweaking git repo https://github.com/jeanguyomarch/mktcb
[INFO] tweaked toml for git repo https://github.com/jeanguyomarch/mktcb written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/jeanguyomarch/mktcb already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+1.46.0" "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] 42a89ddc0ff174c53e67b998867a1fde06092ee857f2e1c949e255b3b0565a9a
[INFO] running `Command { std: "docker" "start" "-a" "42a89ddc0ff174c53e67b998867a1fde06092ee857f2e1c949e255b3b0565a9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42a89ddc0ff174c53e67b998867a1fde06092ee857f2e1c949e255b3b0565a9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42a89ddc0ff174c53e67b998867a1fde06092ee857f2e1c949e255b3b0565a9a", kill_on_drop: false }`
[INFO] [stdout] 42a89ddc0ff174c53e67b998867a1fde06092ee857f2e1c949e255b3b0565a9a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 923a339ff3236859f1d5e0cc4ddd560286d2fbe0bc87e1f667d254691eae94f2
[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" "923a339ff3236859f1d5e0cc4ddd560286d2fbe0bc87e1f667d254691eae94f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling curl v0.4.29
[INFO] [stderr]     Checking number_prefix v0.3.0
[INFO] [stderr]     Checking byte-unit v3.0.3
[INFO] [stderr]    Compiling openssl-sys v0.9.55
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling curl-sys v0.4.31+curl-7.70.0
[INFO] [stderr]    Compiling lzma-sys v0.1.15
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking termios v0.3.2
[INFO] [stderr]     Checking terminal_size v0.1.12
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking xz2 v0.1.6
[INFO] [stderr]     Checking console v0.11.2
[INFO] [stderr]     Checking indicatif v0.14.0
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]    Compiling snafu-derive v0.6.6
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking ctrlc v3.1.4
[INFO] [stderr]     Checking snafu v0.6.6
[INFO] [stderr]  Documenting mktcb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 02s
[INFO] running `Command { std: "docker" "inspect" "923a339ff3236859f1d5e0cc4ddd560286d2fbe0bc87e1f667d254691eae94f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "923a339ff3236859f1d5e0cc4ddd560286d2fbe0bc87e1f667d254691eae94f2", kill_on_drop: false }`
[INFO] [stdout] 923a339ff3236859f1d5e0cc4ddd560286d2fbe0bc87e1f667d254691eae94f2