[INFO] cloning repository https://github.com/sigpher/rust_algorithms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sigpher/rust_algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Frust_algorithms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Frust_algorithms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 165ce3b204735b00bc3f3a0e5202b0a02199dc2b
[INFO] documenting sigpher/rust_algorithms against master#d7d9f15be205b45d44700e7ac33b4f79b91f9680 for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Frust_algorithms" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sigpher/rust_algorithms on toolchain d7d9f15be205b45d44700e7ac33b4f79b91f9680
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d7d9f15be205b45d44700e7ac33b4f79b91f9680" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sigpher/rust_algorithms
[INFO] finished tweaking git repo https://github.com/sigpher/rust_algorithms
[INFO] tweaked toml for git repo https://github.com/sigpher/rust_algorithms written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sigpher/rust_algorithms 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" "+d7d9f15be205b45d44700e7ac33b4f79b91f9680" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[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
[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 sigpher/rust_algorithms against master#50be22964035027398754e54cd3a497efb00f83e for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Frust_algorithms" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sigpher/rust_algorithms on toolchain 50be22964035027398754e54cd3a497efb00f83e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sigpher/rust_algorithms
[INFO] finished tweaking git repo https://github.com/sigpher/rust_algorithms
[INFO] tweaked toml for git repo https://github.com/sigpher/rust_algorithms written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/sigpher/rust_algorithms 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" "+50be22964035027398754e54cd3a497efb00f83e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+50be22964035027398754e54cd3a497efb00f83e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0602cd6fc1b16d7720e2dc9eef9e708c014c0685032e5d8fe524c8127e347958
[INFO] running `Command { std: "docker" "start" "-a" "0602cd6fc1b16d7720e2dc9eef9e708c014c0685032e5d8fe524c8127e347958", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0602cd6fc1b16d7720e2dc9eef9e708c014c0685032e5d8fe524c8127e347958", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0602cd6fc1b16d7720e2dc9eef9e708c014c0685032e5d8fe524c8127e347958", kill_on_drop: false }`
[INFO] [stdout] 0602cd6fc1b16d7720e2dc9eef9e708c014c0685032e5d8fe524c8127e347958
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+50be22964035027398754e54cd3a497efb00f83e" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92aa8f895d76af2fee1d57f00cd42c56c2906ef9d6f14ef5a662f4c1034de8d6
[INFO] running `Command { std: "docker" "start" "-a" "92aa8f895d76af2fee1d57f00cd42c56c2906ef9d6f14ef5a662f4c1034de8d6", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]  Documenting search v0.1.0 (/opt/rustwide/workdir/search)
[INFO] [stderr]  Documenting basic_structure v0.1.0 (/opt/rustwide/workdir/basic_structure)
[INFO] [stderr]  Documenting tree v0.1.0 (/opt/rustwide/workdir/tree)
[INFO] [stderr]  Documenting recursion v0.1.0 (/opt/rustwide/workdir/recursion)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.36s
[INFO] [stderr]    Generated /opt/rustwide/target/doc/basic_structure/index.html
[INFO] [stderr]    Generated /opt/rustwide/target/doc/recursion/index.html
[INFO] [stderr]    Generated /opt/rustwide/target/doc/search/index.html
[INFO] [stderr]    Generated /opt/rustwide/target/doc/tree/index.html
[INFO] running `Command { std: "docker" "inspect" "92aa8f895d76af2fee1d57f00cd42c56c2906ef9d6f14ef5a662f4c1034de8d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92aa8f895d76af2fee1d57f00cd42c56c2906ef9d6f14ef5a662f4c1034de8d6", kill_on_drop: false }`
[INFO] [stdout] 92aa8f895d76af2fee1d57f00cd42c56c2906ef9d6f14ef5a662f4c1034de8d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "RUSTC_BOOTSTRAP=1" "-e" "DOCS_RS=1" "-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" "+50be22964035027398754e54cd3a497efb00f83e" "rustdoc" "--lib" "-Zrustdoc-map" "-Z" "unstable-options" "--config" "build.rustdocflags=[\"-Z\", \"unstable-options\", \"--document-private-items\"]" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c966c9142b4e7f603897b8a8b19f59fb8f9a326a928d9fdcad9300f89e4dc72
[INFO] running `Command { std: "docker" "start" "-a" "2c966c9142b4e7f603897b8a8b19f59fb8f9a326a928d9fdcad9300f89e4dc72", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr] error: manifest path `/opt/rustwide/workdir/Cargo.toml` is a virtual manifest, but this command requires running against an actual package in this workspace
[INFO] running `Command { std: "docker" "inspect" "2c966c9142b4e7f603897b8a8b19f59fb8f9a326a928d9fdcad9300f89e4dc72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c966c9142b4e7f603897b8a8b19f59fb8f9a326a928d9fdcad9300f89e4dc72", kill_on_drop: false }`
[INFO] [stdout] 2c966c9142b4e7f603897b8a8b19f59fb8f9a326a928d9fdcad9300f89e4dc72