[INFO] cloning repository https://github.com/dottorblaster/siren
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dottorblaster/siren" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdottorblaster%2Fsiren", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdottorblaster%2Fsiren'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e22ffaa432a0b405ea3e5721f79da857cdf112b5
[INFO] documenting dottorblaster/siren against master#ef324565d071c6d7e2477a195648549e33d6a465 for pr-121659-bump-pulldown-cmark
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdottorblaster%2Fsiren" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dottorblaster/siren on toolchain ef324565d071c6d7e2477a195648549e33d6a465
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ef324565d071c6d7e2477a195648549e33d6a465" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dottorblaster/siren
[INFO] finished tweaking git repo https://github.com/dottorblaster/siren
[INFO] tweaked toml for git repo https://github.com/dottorblaster/siren written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/dottorblaster/siren already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ef324565d071c6d7e2477a195648549e33d6a465" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] documenting dottorblaster/siren against try#223112bf1ca31911a6475910c77b36bfa127d5f8 for pr-121659-bump-pulldown-cmark
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdottorblaster%2Fsiren" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dottorblaster/siren on toolchain 223112bf1ca31911a6475910c77b36bfa127d5f8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+223112bf1ca31911a6475910c77b36bfa127d5f8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dottorblaster/siren
[INFO] finished tweaking git repo https://github.com/dottorblaster/siren
[INFO] tweaked toml for git repo https://github.com/dottorblaster/siren written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/dottorblaster/siren already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+223112bf1ca31911a6475910c77b36bfa127d5f8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] documenting dottorblaster/siren against try#223112bf1ca31911a6475910c77b36bfa127d5f8 for pr-121659-bump-pulldown-cmark
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdottorblaster%2Fsiren" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dottorblaster/siren on toolchain 223112bf1ca31911a6475910c77b36bfa127d5f8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+223112bf1ca31911a6475910c77b36bfa127d5f8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dottorblaster/siren
[INFO] finished tweaking git repo https://github.com/dottorblaster/siren
[INFO] tweaked toml for git repo https://github.com/dottorblaster/siren written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/dottorblaster/siren already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+223112bf1ca31911a6475910c77b36bfa127d5f8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+223112bf1ca31911a6475910c77b36bfa127d5f8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 615adddbd0864d277900e226290c59b639929f0160a17b4fdf172348d6626f42
[INFO] running `Command { std: "docker" "start" "-a" "615adddbd0864d277900e226290c59b639929f0160a17b4fdf172348d6626f42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "615adddbd0864d277900e226290c59b639929f0160a17b4fdf172348d6626f42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "615adddbd0864d277900e226290c59b639929f0160a17b4fdf172348d6626f42", kill_on_drop: false }`
[INFO] [stdout] 615adddbd0864d277900e226290c59b639929f0160a17b4fdf172348d6626f42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+223112bf1ca31911a6475910c77b36bfa127d5f8" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79ddf45b6f63385001444d8b82213d9382e9ca26fad76a07715f7e838a44fe00
[INFO] running `Command { std: "docker" "start" "-a" "79ddf45b6f63385001444d8b82213d9382e9ca26fad76a07715f7e838a44fe00", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling serde_json v1.0.113
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking clap_lex v0.2.2
[INFO] [stderr]     Checking textwrap v0.15.1
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v3.2.22
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]  Documenting siren v1.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.94s
[INFO] [stderr]    Generated /opt/rustwide/target/doc/siren/index.html
[INFO] running `Command { std: "docker" "inspect" "79ddf45b6f63385001444d8b82213d9382e9ca26fad76a07715f7e838a44fe00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79ddf45b6f63385001444d8b82213d9382e9ca26fad76a07715f7e838a44fe00", kill_on_drop: false }`
[INFO] [stdout] 79ddf45b6f63385001444d8b82213d9382e9ca26fad76a07715f7e838a44fe00