[INFO] cloning repository https://github.com/jessegrosjean/walk
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jessegrosjean/walk" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjessegrosjean%2Fwalk", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjessegrosjean%2Fwalk'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 24597762a6bec16dcc5f421bdd0f3dee960f68cd
[INFO] documenting jessegrosjean/walk 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%2Fjessegrosjean%2Fwalk" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jessegrosjean/walk 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/jessegrosjean/walk
[INFO] finished tweaking git repo https://github.com/jessegrosjean/walk
[INFO] tweaked toml for git repo https://github.com/jessegrosjean/walk written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] e8fcb911cec949b11ba3fe55a0349008dd3d0f85214852dc6a880a78374b68d6
[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" "e8fcb911cec949b11ba3fe55a0349008dd3d0f85214852dc6a880a78374b68d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e8fcb911cec949b11ba3fe55a0349008dd3d0f85214852dc6a880a78374b68d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8fcb911cec949b11ba3fe55a0349008dd3d0f85214852dc6a880a78374b68d6", kill_on_drop: false }`
[INFO] [stdout] e8fcb911cec949b11ba3fe55a0349008dd3d0f85214852dc6a880a78374b68d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 596e6f87c1b1e0cf42dc24a6028d1e7f9b80376b41172842cb22ec00391059cd
[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" "596e6f87c1b1e0cf42dc24a6028d1e7f9b80376b41172842cb22ec00391059cd", kill_on_drop: false }`
[INFO] [stderr]  Documenting jwalk v0.5.2-alpha.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unknown attribute `no-run`. Did you mean `no_run`?
[INFO] [stdout]    --> src/core/error.rs:94:5
[INFO] [stdout]     |
[INFO] [stdout] 94  | /     /// Inspect the original [`io::Error`] if there is one.
[INFO] [stdout] 95  | |     ///
[INFO] [stdout] 96  | |     /// [`None`] is returned if the [`Error`] doesn't correspond to an
[INFO] [stdout] 97  | |     /// [`io::Error`]. This might happen, for example, when the error was
[INFO] [stdout] ...   |
[INFO] [stdout] 150 | |     /// [`into_io_error`]: struct.Error.html#method.into_io_error
[INFO] [stdout] 151 | |     /// [impl]: struct.Error.html#impl-From%3CError%3E
[INFO] [stdout]     | |______________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(invalid_codeblock_attributes)]` on by default
[INFO] [stdout]     = help: the code block will either not be tested if not marked as a rust one or will be run (which you might not want)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.47s
[INFO] running `Command { std: "docker" "inspect" "596e6f87c1b1e0cf42dc24a6028d1e7f9b80376b41172842cb22ec00391059cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "596e6f87c1b1e0cf42dc24a6028d1e7f9b80376b41172842cb22ec00391059cd", kill_on_drop: false }`
[INFO] [stdout] 596e6f87c1b1e0cf42dc24a6028d1e7f9b80376b41172842cb22ec00391059cd