[INFO] fetching crate plugger-ruby 0.3.0...
[INFO] documenting plugger-ruby-0.3.0 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate plugger-ruby 0.3.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate plugger-ruby 0.3.0 on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "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-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "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" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 35242add9f4d73b3e5b3ab7ac34e8f0f58e019f3e8c8b04eaae4ff841568855f
[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" "35242add9f4d73b3e5b3ab7ac34e8f0f58e019f3e8c8b04eaae4ff841568855f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35242add9f4d73b3e5b3ab7ac34e8f0f58e019f3e8c8b04eaae4ff841568855f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35242add9f4d73b3e5b3ab7ac34e8f0f58e019f3e8c8b04eaae4ff841568855f", kill_on_drop: false }`
[INFO] [stdout] 35242add9f4d73b3e5b3ab7ac34e8f0f58e019f3e8c8b04eaae4ff841568855f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0dda00bf95b1f04f9b14879c555994e98cf1f2d091d4e5c9245df50339b8d86
[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" "d0dda00bf95b1f04f9b14879c555994e98cf1f2d091d4e5c9245df50339b8d86", 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 2.54s
[INFO] running `Command { std: "docker" "inspect" "d0dda00bf95b1f04f9b14879c555994e98cf1f2d091d4e5c9245df50339b8d86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0dda00bf95b1f04f9b14879c555994e98cf1f2d091d4e5c9245df50339b8d86", kill_on_drop: false }`
[INFO] [stdout] d0dda00bf95b1f04f9b14879c555994e98cf1f2d091d4e5c9245df50339b8d86