[INFO] cloning repository https://github.com/ruggeri/nedbase
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ruggeri/nedbase" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruggeri%2Fnedbase", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruggeri%2Fnedbase'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 200c54492c2116c973e500649793241772e1cdfa
[INFO] documenting ruggeri/nedbase 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%2Fruggeri%2Fnedbase" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ruggeri/nedbase 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/ruggeri/nedbase
[INFO] finished tweaking git repo https://github.com/ruggeri/nedbase
[INFO] tweaked toml for git repo https://github.com/ruggeri/nedbase written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/ruggeri/nedbase already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c2de5cc7a26bfc8c1ccd5b93f020f25569cc5415cf8226366bb611f9daa6c4d8
[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" "c2de5cc7a26bfc8c1ccd5b93f020f25569cc5415cf8226366bb611f9daa6c4d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2de5cc7a26bfc8c1ccd5b93f020f25569cc5415cf8226366bb611f9daa6c4d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2de5cc7a26bfc8c1ccd5b93f020f25569cc5415cf8226366bb611f9daa6c4d8", kill_on_drop: false }`
[INFO] [stdout] c2de5cc7a26bfc8c1ccd5b93f020f25569cc5415cf8226366bb611f9daa6c4d8
[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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65856bdeb59361cf17c0e35235144f381533ce8693b64b90ce0f04b3f4db02a0
[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" "65856bdeb59361cf17c0e35235144f381533ce8693b64b90ce0f04b3f4db02a0", kill_on_drop: false }`
[INFO] [stderr]     Checking smallvec v0.6.6
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking nedbase v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting nedbase v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/btree/insertion/descend_toward_key.rs:81:13
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let mut last_entry = insert_path.last_mut().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: variable does not need to be mutable
[INFO] [stdout]   --> src/btree/insertion/insert.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut split_info = match insertion_result {
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.55s
[INFO] running `Command { std: "docker" "inspect" "65856bdeb59361cf17c0e35235144f381533ce8693b64b90ce0f04b3f4db02a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65856bdeb59361cf17c0e35235144f381533ce8693b64b90ce0f04b3f4db02a0", kill_on_drop: false }`
[INFO] [stdout] 65856bdeb59361cf17c0e35235144f381533ce8693b64b90ce0f04b3f4db02a0