[INFO] fetching crate asynchron 0.9.1...
[INFO] documenting asynchron-0.9.1 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate asynchron 0.9.1 into /workspace/builds/worker-18/source
[INFO] validating manifest of crates.io crate asynchron 0.9.1 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 crates.io crate asynchron 0.9.1
[INFO] finished tweaking crates.io crate asynchron 0.9.1
[INFO] tweaked toml for crates.io crate asynchron 0.9.1 written to /workspace/builds/worker-18/source/Cargo.toml
[INFO] crate crates.io crate asynchron 0.9.1 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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] 4f31b98b41992a017db4632aafc2e69fa2b3fcc0671ac6e3bba170074073e558
[INFO] running `Command { std: "docker" "start" "-a" "4f31b98b41992a017db4632aafc2e69fa2b3fcc0671ac6e3bba170074073e558", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f31b98b41992a017db4632aafc2e69fa2b3fcc0671ac6e3bba170074073e558", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f31b98b41992a017db4632aafc2e69fa2b3fcc0671ac6e3bba170074073e558", kill_on_drop: false }`
[INFO] [stdout] 4f31b98b41992a017db4632aafc2e69fa2b3fcc0671ac6e3bba170074073e558
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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] bed8609040a8d09c1a4f204ee96dc581ee89eabb16928cc11902a126ef849728
[INFO] running `Command { std: "docker" "start" "-a" "bed8609040a8d09c1a4f204ee96dc581ee89eabb16928cc11902a126ef849728", kill_on_drop: false }`
[INFO] [stderr]  Documenting asynchron v0.9.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]    --> src/lib.rs:221:30
[INFO] [stdout]     |
[INFO] [stdout] 221 |     /// Rust's official doc: https://doc.rust-lang.org/std/thread/struct.Builder.html#method.stack_size
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://doc.rust-lang.org/std/thread/struct.Builder.html#method.stack_size>`
[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/lib.rs:450:30
[INFO] [stdout]     |
[INFO] [stdout] 450 |     /// Rust's official doc: https://doc.rust-lang.org/std/thread/struct.Builder.html#method.stack_size
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://doc.rust-lang.org/std/thread/struct.Builder.html#method.stack_size>`
[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 1.98s
[INFO] running `Command { std: "docker" "inspect" "bed8609040a8d09c1a4f204ee96dc581ee89eabb16928cc11902a126ef849728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bed8609040a8d09c1a4f204ee96dc581ee89eabb16928cc11902a126ef849728", kill_on_drop: false }`
[INFO] [stdout] bed8609040a8d09c1a4f204ee96dc581ee89eabb16928cc11902a126ef849728
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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] 056c456d05131367a8c8aea725c52ac088b2ce1276ae504696ed169616194b49
[INFO] running `Command { std: "docker" "start" "-a" "056c456d05131367a8c8aea725c52ac088b2ce1276ae504696ed169616194b49", kill_on_drop: false }`
[INFO] [stderr]  Documenting asynchron v0.9.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]    --> src/lib.rs:221:30
[INFO] [stdout]     |
[INFO] [stdout] 221 |     /// Rust's official doc: https://doc.rust-lang.org/std/thread/struct.Builder.html#method.stack_size
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://doc.rust-lang.org/std/thread/struct.Builder.html#method.stack_size>`
[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/lib.rs:450:30
[INFO] [stdout]     |
[INFO] [stdout] 450 |     /// Rust's official doc: https://doc.rust-lang.org/std/thread/struct.Builder.html#method.stack_size
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://doc.rust-lang.org/std/thread/struct.Builder.html#method.stack_size>`
[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 1.16s
[INFO] running `Command { std: "docker" "inspect" "056c456d05131367a8c8aea725c52ac088b2ce1276ae504696ed169616194b49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "056c456d05131367a8c8aea725c52ac088b2ce1276ae504696ed169616194b49", kill_on_drop: false }`
[INFO] [stdout] 056c456d05131367a8c8aea725c52ac088b2ce1276ae504696ed169616194b49