[INFO] fetching crate cbindgen 0.20.0...
[INFO] documenting cbindgen-0.20.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate cbindgen 0.20.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate cbindgen 0.20.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cbindgen 0.20.0
[INFO] finished tweaking crates.io crate cbindgen 0.20.0
[INFO] tweaked toml for crates.io crate cbindgen 0.20.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate cbindgen 0.20.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serial_test_derive v0.5.0
[INFO] [stderr]   Downloaded serial_test v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", 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] 1dee689f423874f7847c5c006ed5767988d72b75b648993f8f16e4249fcbf9c7
[INFO] running `Command { std: "docker" "start" "-a" "1dee689f423874f7847c5c006ed5767988d72b75b648993f8f16e4249fcbf9c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1dee689f423874f7847c5c006ed5767988d72b75b648993f8f16e4249fcbf9c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dee689f423874f7847c5c006ed5767988d72b75b648993f8f16e4249fcbf9c7", kill_on_drop: false }`
[INFO] [stdout] 1dee689f423874f7847c5c006ed5767988d72b75b648993f8f16e4249fcbf9c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86e3c7f1d19ab9495506d9dd2424f00a68951b35e11fccea7f9cf5445b1ef468
[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" "86e3c7f1d19ab9495506d9dd2424f00a68951b35e11fccea7f9cf5445b1ef468", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling cbindgen v0.20.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking proc-macro2 v1.0.21
[INFO] [stderr]     Checking heck v0.3.1
[INFO] [stderr]     Checking quote v1.0.7
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]     Checking serde v1.0.116
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]  Documenting cbindgen v0.20.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unresolved link to `must_use`
[INFO] [stdout]    --> src/bindgen/config.rs:405:50
[INFO] [stdout]     |
[INFO] [stdout] 405 |     /// The way to annotation this function as #[must_use]
[INFO] [stdout]     |                                                  ^^^^^^^^ no item named `must_use` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `must_use`
[INFO] [stdout]    --> src/bindgen/config.rs:478:46
[INFO] [stdout]     |
[INFO] [stdout] 478 |     /// The way to annotate this struct as #[must_use].
[INFO] [stdout]     |                                              ^^^^^^^^ no item named `must_use` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `must_use`
[INFO] [stdout]    --> src/bindgen/config.rs:557:46
[INFO] [stdout]     |
[INFO] [stdout] 557 |     /// The way to annotation this enum as #[must_use].
[INFO] [stdout]     |                                              ^^^^^^^^ no item named `must_use` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `must_use`
[INFO] [stdout]    --> src/bindgen/config.rs:405:50
[INFO] [stdout]     |
[INFO] [stdout] 405 |     /// The way to annotation this function as #[must_use]
[INFO] [stdout]     |                                                  ^^^^^^^^ no item named `must_use` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.56s
[INFO] running `Command { std: "docker" "inspect" "86e3c7f1d19ab9495506d9dd2424f00a68951b35e11fccea7f9cf5445b1ef468", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86e3c7f1d19ab9495506d9dd2424f00a68951b35e11fccea7f9cf5445b1ef468", kill_on_drop: false }`
[INFO] [stdout] 86e3c7f1d19ab9495506d9dd2424f00a68951b35e11fccea7f9cf5445b1ef468
