[INFO] fetching crate tailcall-impl 0.1.6...
[INFO] documenting tailcall-impl-0.1.6 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate tailcall-impl 0.1.6 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate tailcall-impl 0.1.6 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 tailcall-impl 0.1.6
[INFO] finished tweaking crates.io crate tailcall-impl 0.1.6
[INFO] tweaked toml for crates.io crate tailcall-impl 0.1.6 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--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-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 3b032fc9f986dc776e9a332b462c407d9217b81de101e23e5793bb0628bc2b52
[INFO] running `Command { std: "docker" "start" "-a" "3b032fc9f986dc776e9a332b462c407d9217b81de101e23e5793bb0628bc2b52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b032fc9f986dc776e9a332b462c407d9217b81de101e23e5793bb0628bc2b52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b032fc9f986dc776e9a332b462c407d9217b81de101e23e5793bb0628bc2b52", kill_on_drop: false }`
[INFO] [stdout] 3b032fc9f986dc776e9a332b462c407d9217b81de101e23e5793bb0628bc2b52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] [stdout] 8218a8dd58f76fb66e57ecaa99913532833a9b30408500644acec5ffc717ac1e
[INFO] running `Command { std: "docker" "start" "-a" "8218a8dd58f76fb66e57ecaa99913532833a9b30408500644acec5ffc717ac1e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]     Checking unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]  Documenting tailcall-impl v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `tailcall` is both a function and an attribute macro
[INFO] [stdout]  --> src/lib.rs:1:70
[INFO] [stdout]   |
[INFO] [stdout] 1 | //! This crate contains the procedural macro implementation for the [tailcall] crate.
[INFO] [stdout]   |                                                                      ^^^^^^^^ ambiguous link
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout] help: to link to the function, add parentheses
[INFO] [stdout]   |
[INFO] [stdout] 1 | //! This crate contains the procedural macro implementation for the [tailcall()] crate.
[INFO] [stdout]   |                                                                              ++
[INFO] [stdout] help: to link to the attribute macro, prefix with `macro@`
[INFO] [stdout]   |
[INFO] [stdout] 1 | //! This crate contains the procedural macro implementation for the [macro@tailcall] crate.
[INFO] [stdout]   |                                                                      ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `tailcall` is both a function and an attribute macro
[INFO] [stdout]  --> src/lib.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | //! [tailcall]: https://crates.io/crates/tailcall
[INFO] [stdout]   |      ^^^^^^^^ ambiguous link
[INFO] [stdout]   |
[INFO] [stdout] help: to link to the function, add parentheses
[INFO] [stdout]   |
[INFO] [stdout] 3 | //! [tailcall()]: https://crates.io/crates/tailcall
[INFO] [stdout]   |              ++
[INFO] [stdout] help: to link to the attribute macro, prefix with `macro@`
[INFO] [stdout]   |
[INFO] [stdout] 3 | //! [macro@tailcall]: https://crates.io/crates/tailcall
[INFO] [stdout]   |      ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]  --> src/lib.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | //! [tailcall]: https://crates.io/crates/tailcall
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://crates.io/crates/tailcall>`
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.27s
[INFO] running `Command { std: "docker" "inspect" "8218a8dd58f76fb66e57ecaa99913532833a9b30408500644acec5ffc717ac1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8218a8dd58f76fb66e57ecaa99913532833a9b30408500644acec5ffc717ac1e", kill_on_drop: false }`
[INFO] [stdout] 8218a8dd58f76fb66e57ecaa99913532833a9b30408500644acec5ffc717ac1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 1a0a722da73d71494fcdb7bd010053d7450fff75c5868d1809a457a84c7cf7eb
[INFO] running `Command { std: "docker" "start" "-a" "1a0a722da73d71494fcdb7bd010053d7450fff75c5868d1809a457a84c7cf7eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]     Checking unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]  Documenting tailcall-impl v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `tailcall` is both a function and an attribute macro
[INFO] [stdout]  --> src/lib.rs:1:70
[INFO] [stdout]   |
[INFO] [stdout] 1 | //! This crate contains the procedural macro implementation for the [tailcall] crate.
[INFO] [stdout]   |                                                                      ^^^^^^^^ ambiguous link
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout] help: to link to the function, add parentheses
[INFO] [stdout]   |
[INFO] [stdout] 1 | //! This crate contains the procedural macro implementation for the [tailcall()] crate.
[INFO] [stdout]   |                                                                              ++
[INFO] [stdout] help: to link to the attribute macro, prefix with `macro@`
[INFO] [stdout]   |
[INFO] [stdout] 1 | //! This crate contains the procedural macro implementation for the [macro@tailcall] crate.
[INFO] [stdout]   |                                                                      ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `tailcall` is both a function and an attribute macro
[INFO] [stdout]  --> src/lib.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | //! [tailcall]: https://crates.io/crates/tailcall
[INFO] [stdout]   |      ^^^^^^^^ ambiguous link
[INFO] [stdout]   |
[INFO] [stdout] help: to link to the function, add parentheses
[INFO] [stdout]   |
[INFO] [stdout] 3 | //! [tailcall()]: https://crates.io/crates/tailcall
[INFO] [stdout]   |              ++
[INFO] [stdout] help: to link to the attribute macro, prefix with `macro@`
[INFO] [stdout]   |
[INFO] [stdout] 3 | //! [macro@tailcall]: https://crates.io/crates/tailcall
[INFO] [stdout]   |      ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]  --> src/lib.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | //! [tailcall]: https://crates.io/crates/tailcall
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://crates.io/crates/tailcall>`
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.36s
[INFO] running `Command { std: "docker" "inspect" "1a0a722da73d71494fcdb7bd010053d7450fff75c5868d1809a457a84c7cf7eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a0a722da73d71494fcdb7bd010053d7450fff75c5868d1809a457a84c7cf7eb", kill_on_drop: false }`
[INFO] [stdout] 1a0a722da73d71494fcdb7bd010053d7450fff75c5868d1809a457a84c7cf7eb