[INFO] fetching crate handoff_counter 0.8.5...
[INFO] documenting handoff_counter-0.8.5 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate handoff_counter 0.8.5 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate handoff_counter 0.8.5 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", 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-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f2e36be922349416adf4c4de9825c725e3367e7ceeef6e59940dd1d89d07f5b
[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" "2f2e36be922349416adf4c4de9825c725e3367e7ceeef6e59940dd1d89d07f5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f2e36be922349416adf4c4de9825c725e3367e7ceeef6e59940dd1d89d07f5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f2e36be922349416adf4c4de9825c725e3367e7ceeef6e59940dd1d89d07f5b", kill_on_drop: false }`
[INFO] [stdout] 2f2e36be922349416adf4c4de9825c725e3367e7ceeef6e59940dd1d89d07f5b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 323afeccc9c31c8791535b8975b7ae22bc09cb0f77d974ee9db3c41f19af8e60
[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" "323afeccc9c31c8791535b8975b7ae22bc09cb0f77d974ee9db3c41f19af8e60", kill_on_drop: false }`
[INFO] [stderr]     Checking handoff_counter v0.8.5 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting 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 1.79s
[INFO] running `Command { std: "docker" "inspect" "323afeccc9c31c8791535b8975b7ae22bc09cb0f77d974ee9db3c41f19af8e60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "323afeccc9c31c8791535b8975b7ae22bc09cb0f77d974ee9db3c41f19af8e60", kill_on_drop: false }`
[INFO] [stdout] 323afeccc9c31c8791535b8975b7ae22bc09cb0f77d974ee9db3c41f19af8e60