[INFO] fetching crate plugger-ruby 0.3.0...
[INFO] documenting plugger-ruby-0.3.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate plugger-ruby 0.3.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate plugger-ruby 0.3.0 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate plugger-ruby 0.3.0
[INFO] finished tweaking crates.io crate plugger-ruby 0.3.0
[INFO] tweaked toml for crates.io crate plugger-ruby 0.3.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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" "+1.46.0" "fetch" "--locked" "--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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25350b70d5df375b0b3821b94b0729de28957ad46b5f5fc5758a09e2529b63d8
[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" "25350b70d5df375b0b3821b94b0729de28957ad46b5f5fc5758a09e2529b63d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25350b70d5df375b0b3821b94b0729de28957ad46b5f5fc5758a09e2529b63d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25350b70d5df375b0b3821b94b0729de28957ad46b5f5fc5758a09e2529b63d8", kill_on_drop: false }`
[INFO] [stdout] 25350b70d5df375b0b3821b94b0729de28957ad46b5f5fc5758a09e2529b63d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0edf4c10b827fc0e8a5eb18ffadbd2749a7bd77bbb00b69558b1d1d4948efd7
[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" "b0edf4c10b827fc0e8a5eb18ffadbd2749a7bd77bbb00b69558b1d1d4948efd7", kill_on_drop: false }`
[INFO] [stderr]     Checking plugger-core v0.3.0
[INFO] [stderr]    Compiling mri-sys v0.2.4
[INFO] [stderr]     Checking rurust v0.1.11
[INFO] [stderr]  Documenting plugger-ruby v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `rurust::Value`, which is not FFI-safe
[INFO] [stdout]   --> src/shims.rs:43:74
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub extern fn ruby_method(argc: libc::c_int, argv: *const Value, object: Value) -> Value {
[INFO] [stdout]    |                                                                          ^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `rurust::Value`, which is not FFI-safe
[INFO] [stdout]   --> src/shims.rs:43:84
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub extern fn ruby_method(argc: libc::c_int, argv: *const Value, object: Value) -> Value {
[INFO] [stdout]    |                                                                                    ^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `rurust::Value`, which is not FFI-safe
[INFO] [stdout]   --> src/shims.rs:65:84
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub extern fn ruby_singleton_method(argc: libc::c_int, argv: *const Value, _class: Value) -> Value {
[INFO] [stdout]    |                                                                                    ^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `rurust::Value`, which is not FFI-safe
[INFO] [stdout]   --> src/shims.rs:65:94
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub extern fn ruby_singleton_method(argc: libc::c_int, argv: *const Value, _class: Value) -> Value {
[INFO] [stdout]    |                                                                                              ^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.28s
[INFO] running `Command { std: "docker" "inspect" "b0edf4c10b827fc0e8a5eb18ffadbd2749a7bd77bbb00b69558b1d1d4948efd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0edf4c10b827fc0e8a5eb18ffadbd2749a7bd77bbb00b69558b1d1d4948efd7", kill_on_drop: false }`
[INFO] [stdout] b0edf4c10b827fc0e8a5eb18ffadbd2749a7bd77bbb00b69558b1d1d4948efd7