[INFO] cloning repository https://github.com/mainmatter/async-rust-workshop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mainmatter/async-rust-workshop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmainmatter%2Fasync-rust-workshop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmainmatter%2Fasync-rust-workshop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 01e03df9f704086f6956a0c524e4ddc5c42a4ede
[INFO] documenting mainmatter/async-rust-workshop against da3f5c31e5535b3dc210067de660a45784ae1e9c for pr-162169
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmainmatter%2Fasync-rust-workshop" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/mainmatter/async-rust-workshop
[INFO] finished tweaking git repo https://github.com/mainmatter/async-rust-workshop
[INFO] tweaked toml for git repo https://github.com/mainmatter/async-rust-workshop written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mainmatter/async-rust-workshop on toolchain da3f5c31e5535b3dc210067de660a45784ae1e9c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+da3f5c31e5535b3dc210067de660a45784ae1e9c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mainmatter/async-rust-workshop 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" "+da3f5c31e5535b3dc210067de660a45784ae1e9c" "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
[INFO] documenting mainmatter/async-rust-workshop against da3f5c31e5535b3dc210067de660a45784ae1e9c for pr-162169
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmainmatter%2Fasync-rust-workshop" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/mainmatter/async-rust-workshop
[INFO] finished tweaking git repo https://github.com/mainmatter/async-rust-workshop
[INFO] tweaked toml for git repo https://github.com/mainmatter/async-rust-workshop written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mainmatter/async-rust-workshop on toolchain da3f5c31e5535b3dc210067de660a45784ae1e9c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+da3f5c31e5535b3dc210067de660a45784ae1e9c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mainmatter/async-rust-workshop 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" "+da3f5c31e5535b3dc210067de660a45784ae1e9c" "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/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 42bd3c034de52cb99720f4d1afe24a5fa2659659ffd04732dd670294d3f2bb4d
[INFO] running `Command { std: "docker" "start" "42bd3c034de52cb99720f4d1afe24a5fa2659659ffd04732dd670294d3f2bb4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42bd3c034de52cb99720f4d1afe24a5fa2659659ffd04732dd670294d3f2bb4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "42bd3c034de52cb99720f4d1afe24a5fa2659659ffd04732dd670294d3f2bb4d" "/opt/rustwide/cargo-home/bin/cargo" "+da3f5c31e5535b3dc210067de660a45784ae1e9c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42bd3c034de52cb99720f4d1afe24a5fa2659659ffd04732dd670294d3f2bb4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "42bd3c034de52cb99720f4d1afe24a5fa2659659ffd04732dd670294d3f2bb4d" "/opt/rustwide/cargo-home/bin/cargo" "+da3f5c31e5535b3dc210067de660a45784ae1e9c" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] error: document output filename collision
[INFO] [stderr] The bin `client` in package `backpressure_intro v0.1.0 (/opt/rustwide/workdir/exercises/06_backpressure/00_intro)` has the same name as the bin `client` in package `backpressure_bounded v0.1.0 (/opt/rustwide/workdir/exercises/06_backpressure/01_bounded)`.
[INFO] [stderr] Only one may be documented at once since they output to the same path.
[INFO] [stderr] Consider documenting only one, renaming one, or marking one with `doc = false` in Cargo.toml.
[INFO] running `Command { std: "docker" "inspect" "42bd3c034de52cb99720f4d1afe24a5fa2659659ffd04732dd670294d3f2bb4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42bd3c034de52cb99720f4d1afe24a5fa2659659ffd04732dd670294d3f2bb4d", kill_on_drop: false }`
[INFO] [stdout] 42bd3c034de52cb99720f4d1afe24a5fa2659659ffd04732dd670294d3f2bb4d
