[INFO] cloning repository https://github.com/catunlock/numbers-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/catunlock/numbers-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcatunlock%2Fnumbers-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcatunlock%2Fnumbers-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6d587c6f43348d021ce5e15059abea91ba7da4c
[INFO] documenting catunlock/numbers-rust against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcatunlock%2Fnumbers-rust" "/workspace/builds/worker-25/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-25/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/catunlock/numbers-rust on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/catunlock/numbers-rust
[INFO] finished tweaking git repo https://github.com/catunlock/numbers-rust
[INFO] tweaked toml for git repo https://github.com/catunlock/numbers-rust written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate git repo https://github.com/catunlock/numbers-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num_cpus v1.13.0
[INFO] [stderr]   Downloaded threadpool v1.8.1
[INFO] [stderr]   Downloaded hermit-abi v0.1.19
[INFO] [stderr]   Downloaded libc v0.2.101
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 27c68f3dc605062df1ea24f4f259e62dd9f36dbd291459932171090a0f36b3dc
[INFO] running `Command { std: "docker" "start" "-a" "27c68f3dc605062df1ea24f4f259e62dd9f36dbd291459932171090a0f36b3dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27c68f3dc605062df1ea24f4f259e62dd9f36dbd291459932171090a0f36b3dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27c68f3dc605062df1ea24f4f259e62dd9f36dbd291459932171090a0f36b3dc", kill_on_drop: false }`
[INFO] [stdout] 27c68f3dc605062df1ea24f4f259e62dd9f36dbd291459932171090a0f36b3dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28dcd316e94fcd9321bdac17feb07f2b72f1506d512b6509c308336f12568e95
[INFO] running `Command { std: "docker" "start" "-a" "28dcd316e94fcd9321bdac17feb07f2b72f1506d512b6509c308336f12568e95", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]  Documenting flap_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking flap_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `numbers` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/lib.rs:38:38
[INFO] [stdout]    |
[INFO] [stdout] 37 |                 match numbers.get(&number) {
[INFO] [stdout]    |                       -------------------- immutable borrow occurs here
[INFO] [stdout] 38 |                     Some(value) => { numbers.insert(number, value + 1); },
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^^^^^^^^-----^^^^^
[INFO] [stdout]    |                                      |                      |
[INFO] [stdout]    |                                      |                      immutable borrow later used here
[INFO] [stdout]    |                                      mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.41s
[INFO] running `Command { std: "docker" "inspect" "28dcd316e94fcd9321bdac17feb07f2b72f1506d512b6509c308336f12568e95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28dcd316e94fcd9321bdac17feb07f2b72f1506d512b6509c308336f12568e95", kill_on_drop: false }`
[INFO] [stdout] 28dcd316e94fcd9321bdac17feb07f2b72f1506d512b6509c308336f12568e95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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" "+1.61.0" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] a25f3c2415101a21e2d77fa6d9b0d298e5b9d97f7b041504e4192190f8e6f8ee
[INFO] running `Command { std: "docker" "start" "-a" "a25f3c2415101a21e2d77fa6d9b0d298e5b9d97f7b041504e4192190f8e6f8ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]  Documenting flap_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.71s
[INFO] running `Command { std: "docker" "inspect" "a25f3c2415101a21e2d77fa6d9b0d298e5b9d97f7b041504e4192190f8e6f8ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a25f3c2415101a21e2d77fa6d9b0d298e5b9d97f7b041504e4192190f8e6f8ee", kill_on_drop: false }`
[INFO] [stdout] a25f3c2415101a21e2d77fa6d9b0d298e5b9d97f7b041504e4192190f8e6f8ee