[INFO] fetching crate cbindgen 0.15.0...
[INFO] documenting cbindgen-0.15.0 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate cbindgen 0.15.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate cbindgen 0.15.0 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cbindgen 0.15.0
[INFO] finished tweaking crates.io crate cbindgen 0.15.0
[INFO] tweaked toml for crates.io crate cbindgen 0.15.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate cbindgen 0.15.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 795aa7a3c66419270addf094ebfc2a452aee559f567479e2647f9fb966a508f5
[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" "795aa7a3c66419270addf094ebfc2a452aee559f567479e2647f9fb966a508f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "795aa7a3c66419270addf094ebfc2a452aee559f567479e2647f9fb966a508f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "795aa7a3c66419270addf094ebfc2a452aee559f567479e2647f9fb966a508f5", kill_on_drop: false }`
[INFO] [stdout] 795aa7a3c66419270addf094ebfc2a452aee559f567479e2647f9fb966a508f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 574d89d611fb8d4610408f96c83644b7b679a259b9cd691a4bed1d3a0ac61d8b
[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" "574d89d611fb8d4610408f96c83644b7b679a259b9cd691a4bed1d3a0ac61d8b", 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling cbindgen v0.15.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking heck v0.3.1
[INFO] [stderr]     Checking proc-macro2 v1.0.21
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking clap v2.33.3
[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 toml v0.5.6
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]  Documenting cbindgen v0.15.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unresolved link to `must_use`
[INFO] [stdout]    --> src/bindgen/config.rs:377:50
[INFO] [stdout]     |
[INFO] [stdout] 377 |     /// The way to annotation this function as #[must_use]
[INFO] [stdout]     |                                                  ^^^^^^^^ the module `config` contains no item named `must_use`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(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:450:46
[INFO] [stdout]     |
[INFO] [stdout] 450 |     /// The way to annotate this struct as #[must_use].
[INFO] [stdout]     |                                              ^^^^^^^^ the module `config` contains no item named `must_use`
[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:529:46
[INFO] [stdout]     |
[INFO] [stdout] 529 |     /// The way to annotation this enum as #[must_use].
[INFO] [stdout]     |                                              ^^^^^^^^ the module `config` contains no item named `must_use`
[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:377:50
[INFO] [stdout]     |
[INFO] [stdout] 377 |     /// The way to annotation this function as #[must_use]
[INFO] [stdout]     |                                                  ^^^^^^^^ the module `config` contains no item named `must_use`
[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 46.67s
[INFO] running `Command { std: "docker" "inspect" "574d89d611fb8d4610408f96c83644b7b679a259b9cd691a4bed1d3a0ac61d8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "574d89d611fb8d4610408f96c83644b7b679a259b9cd691a4bed1d3a0ac61d8b", kill_on_drop: false }`
[INFO] [stdout] 574d89d611fb8d4610408f96c83644b7b679a259b9cd691a4bed1d3a0ac61d8b
