[INFO] fetching crate fern 0.6.1...
[INFO] documenting fern-0.6.1 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate fern 0.6.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate fern 0.6.1 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 fern 0.6.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate fern 0.6.1
[INFO] tweaked toml for crates.io crate fern 0.6.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate fern 0.6.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 79a7be13704632e03438f5a822c7102d2551c5178c8334954566d164b56cae7e
[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" "79a7be13704632e03438f5a822c7102d2551c5178c8334954566d164b56cae7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79a7be13704632e03438f5a822c7102d2551c5178c8334954566d164b56cae7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79a7be13704632e03438f5a822c7102d2551c5178c8334954566d164b56cae7e", kill_on_drop: false }`
[INFO] [stdout] 79a7be13704632e03438f5a822c7102d2551c5178c8334954566d164b56cae7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0673fc061af0cbb762b0c3b4b32facbfe1540a8e4a6e9f247423c4e1e151241b
[INFO] running `Command { std: "docker" "start" "-a" "0673fc061af0cbb762b0c3b4b32facbfe1540a8e4a6e9f247423c4e1e151241b", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]  Documenting fern v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.16s
[INFO] running `Command { std: "docker" "inspect" "0673fc061af0cbb762b0c3b4b32facbfe1540a8e4a6e9f247423c4e1e151241b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0673fc061af0cbb762b0c3b4b32facbfe1540a8e4a6e9f247423c4e1e151241b", kill_on_drop: false }`
[INFO] [stdout] 0673fc061af0cbb762b0c3b4b32facbfe1540a8e4a6e9f247423c4e1e151241b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "--all-features" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] ed0f60ba1f176d886b9e8cf96435c6b5bf626caf6338e9250ebe618af105ff00
[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" "ed0f60ba1f176d886b9e8cf96435c6b5bf626caf6338e9250ebe618af105ff00", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling signal-hook v0.3.13
[INFO] [stderr]     Checking num_threads v0.1.5
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking unix_socket v0.5.0
[INFO] [stderr]     Checking time v0.3.9
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking signal-hook v0.1.17
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling reopen v1.0.3
[INFO] [stderr]     Checking reopen v0.3.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking syslog v3.3.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.33
[INFO] [stderr]     Checking syslog v6.0.1
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking backtrace v0.3.45
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking syslog v4.0.1
[INFO] [stderr]  Documenting fern v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]    --> src/builders.rs:925:26
[INFO] [stdout]     |
[INFO] [stdout] 925 |     /// Note that due to https://github.com/Geal/rust-syslog/issues/41,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://github.com/Geal/rust-syslog/issues/41>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(rustdoc::bare_urls)]` on by default
[INFO] [stdout]     = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]    --> src/builders.rs:944:26
[INFO] [stdout]     |
[INFO] [stdout] 944 |     /// Note that due to https://github.com/Geal/rust-syslog/issues/41,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://github.com/Geal/rust-syslog/issues/41>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.53s
[INFO] running `Command { std: "docker" "inspect" "ed0f60ba1f176d886b9e8cf96435c6b5bf626caf6338e9250ebe618af105ff00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed0f60ba1f176d886b9e8cf96435c6b5bf626caf6338e9250ebe618af105ff00", kill_on_drop: false }`
[INFO] [stdout] ed0f60ba1f176d886b9e8cf96435c6b5bf626caf6338e9250ebe618af105ff00