[INFO] fetching crate pen-ffi 0.3.5...
[INFO] checking pen-ffi-0.3.5 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate pen-ffi 0.3.5 into /workspace/builds/worker-80/source
[INFO] validating manifest of crates.io crate pen-ffi 0.3.5 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pen-ffi 0.3.5
[INFO] finished tweaking crates.io crate pen-ffi 0.3.5
[INFO] tweaked toml for crates.io crate pen-ffi 0.3.5 written to /workspace/builds/worker-80/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 057c10345c61e9a102c021190e074f0d521e0361288ad236dfcaa0b916817306
[INFO] running `Command { std: "docker" "start" "-a" "057c10345c61e9a102c021190e074f0d521e0361288ad236dfcaa0b916817306", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "057c10345c61e9a102c021190e074f0d521e0361288ad236dfcaa0b916817306", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "057c10345c61e9a102c021190e074f0d521e0361288ad236dfcaa0b916817306", kill_on_drop: false }`
[INFO] [stdout] 057c10345c61e9a102c021190e074f0d521e0361288ad236dfcaa0b916817306
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c53a6165a9e0869fa247b0e073c060b24db9b5daf93f0133daa70a9d48827c13
[INFO] running `Command { std: "docker" "start" "-a" "c53a6165a9e0869fa247b0e073c060b24db9b5daf93f0133daa70a9d48827c13", kill_on_drop: false }`
[INFO] [stderr]     Checking pen-ffi v0.3.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` block uses type `Context`, which is not FFI-safe
[INFO] [stdout]   --> src/cps/async_stack.rs:63:40
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn _test_async_stack_ffi_safety(_: *mut AsyncStack<'_, '_>);
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes)]` 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` block uses type `std::task::Context`, which is not FFI-safe
[INFO] [stdout]   --> src/cps/async_stack.rs:63:40
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn _test_async_stack_ffi_safety(_: *mut AsyncStack<'_, '_>);
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes)]` 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "c53a6165a9e0869fa247b0e073c060b24db9b5daf93f0133daa70a9d48827c13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c53a6165a9e0869fa247b0e073c060b24db9b5daf93f0133daa70a9d48827c13", kill_on_drop: false }`
[INFO] [stdout] c53a6165a9e0869fa247b0e073c060b24db9b5daf93f0133daa70a9d48827c13