[INFO] fetching crate handoff_counter 0.8.5...
[INFO] documenting handoff_counter-0.8.5 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate handoff_counter 0.8.5 into /workspace/builds/worker-80/source
[INFO] validating manifest of crates.io crate handoff_counter 0.8.5 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate handoff_counter 0.8.5
[INFO] finished tweaking crates.io crate handoff_counter 0.8.5
[INFO] tweaked toml for crates.io crate handoff_counter 0.8.5 written to /workspace/builds/worker-80/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c40ec94c7590da38163c57c6d3e5821ab1d915d553b5a925ba4dbd11b7137f6
[INFO] running `Command { std: "docker" "start" "-a" "0c40ec94c7590da38163c57c6d3e5821ab1d915d553b5a925ba4dbd11b7137f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c40ec94c7590da38163c57c6d3e5821ab1d915d553b5a925ba4dbd11b7137f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c40ec94c7590da38163c57c6d3e5821ab1d915d553b5a925ba4dbd11b7137f6", kill_on_drop: false }`
[INFO] [stdout] 0c40ec94c7590da38163c57c6d3e5821ab1d915d553b5a925ba4dbd11b7137f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a3af7e6d545038f4f61a0f16a6c1ff1e6f70b056d05a1b081c538fa5bcad412
[INFO] running `Command { std: "docker" "start" "-a" "2a3af7e6d545038f4f61a0f16a6c1ff1e6f70b056d05a1b081c538fa5bcad412", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]  Documenting handoff_counter v0.8.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking handoff_counter v0.8.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/handoff_counter.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let mut v = self.vals.get_mut(&self.id).unwrap();
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.71s
[INFO] running `Command { std: "docker" "inspect" "2a3af7e6d545038f4f61a0f16a6c1ff1e6f70b056d05a1b081c538fa5bcad412", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a3af7e6d545038f4f61a0f16a6c1ff1e6f70b056d05a1b081c538fa5bcad412", kill_on_drop: false }`
[INFO] [stdout] 2a3af7e6d545038f4f61a0f16a6c1ff1e6f70b056d05a1b081c538fa5bcad412
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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=warn" "-e" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 77661b524fd876e1badd9762f4c5ecad4e5784073fd9c8ac4b6128ce41098a76
[INFO] running `Command { std: "docker" "start" "-a" "77661b524fd876e1badd9762f4c5ecad4e5784073fd9c8ac4b6128ce41098a76", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]  Documenting handoff_counter v0.8.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.36s
[INFO] running `Command { std: "docker" "inspect" "77661b524fd876e1badd9762f4c5ecad4e5784073fd9c8ac4b6128ce41098a76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77661b524fd876e1badd9762f4c5ecad4e5784073fd9c8ac4b6128ce41098a76", kill_on_drop: false }`
[INFO] [stdout] 77661b524fd876e1badd9762f4c5ecad4e5784073fd9c8ac4b6128ce41098a76