[INFO] fetching crate xlang_abi 0.2.0...
[INFO] checking xlang_abi-0.2.0 against master#b657dc555b1ecf837cc4ea471fbae6a731529d55 for pr-113457
[INFO] extracting crate xlang_abi 0.2.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate xlang_abi 0.2.0 on toolchain b657dc555b1ecf837cc4ea471fbae6a731529d55
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b657dc555b1ecf837cc4ea471fbae6a731529d55" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xlang_abi 0.2.0
[INFO] finished tweaking crates.io crate xlang_abi 0.2.0
[INFO] tweaked toml for crates.io crate xlang_abi 0.2.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b657dc555b1ecf837cc4ea471fbae6a731529d55" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b657dc555b1ecf837cc4ea471fbae6a731529d55" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cfg-match v0.2.1
[INFO] [stderr]   Downloaded xlang_host v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:5c16f4e6c37141f9fef0bc86f7a492d732943053e42aab8461035881e3f53823" "/opt/rustwide/cargo-home/bin/cargo" "+b657dc555b1ecf837cc4ea471fbae6a731529d55" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d1ca092af83e004814e24a2fb4e1c4070f959c4c385dbb77864413bae8f819b2
[INFO] running `Command { std: "docker" "start" "-a" "d1ca092af83e004814e24a2fb4e1c4070f959c4c385dbb77864413bae8f819b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1ca092af83e004814e24a2fb4e1c4070f959c4c385dbb77864413bae8f819b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1ca092af83e004814e24a2fb4e1c4070f959c4c385dbb77864413bae8f819b2", kill_on_drop: false }`
[INFO] [stdout] d1ca092af83e004814e24a2fb4e1c4070f959c4c385dbb77864413bae8f819b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:5c16f4e6c37141f9fef0bc86f7a492d732943053e42aab8461035881e3f53823" "/opt/rustwide/cargo-home/bin/cargo" "+b657dc555b1ecf837cc4ea471fbae6a731529d55" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 071164e6b38974cb204d4c05e8e9a0ede4e0e9c8da92deb76f0bd3e6a6e3cf64
[INFO] running `Command { std: "docker" "start" "-a" "071164e6b38974cb204d4c05e8e9a0ede4e0e9c8da92deb76f0bd3e6a6e3cf64", kill_on_drop: false }`
[INFO] [stderr]    Compiling xlang_host v0.2.0
[INFO] [stderr]     Checking cfg-match v0.2.1
[INFO] [stderr]     Checking xlang_abi v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/io.rs:846:12
[INFO] [stdout]     |
[INFO] [stdout] 846 |     flush: unsafe extern "C" fn(*mut ()) -> Result<()>,
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:1:9
[INFO] [stdout]     |
[INFO] [stdout] 1   | #![deny(warnings, clippy::all, clippy::pedantic, clippy::nursery, missing_docs)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(improper_ctypes_definitions)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `extern` fn uses type `()`, which is not FFI-safe
[INFO] [stdout]    --> src/io.rs:846:12
[INFO] [stdout]     |
[INFO] [stdout] 846 |     flush: unsafe extern "C" fn(*mut ()) -> Result<()>,
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a struct instead
[INFO] [stdout]     = note: tuples have unspecified layout
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:1:9
[INFO] [stdout]     |
[INFO] [stdout] 1   | #![deny(warnings, clippy::all, clippy::pedantic, clippy::nursery, missing_docs)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(improper_ctypes_definitions)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `xlang_abi` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `xlang_abi` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "071164e6b38974cb204d4c05e8e9a0ede4e0e9c8da92deb76f0bd3e6a6e3cf64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "071164e6b38974cb204d4c05e8e9a0ede4e0e9c8da92deb76f0bd3e6a6e3cf64", kill_on_drop: false }`
[INFO] [stdout] 071164e6b38974cb204d4c05e8e9a0ede4e0e9c8da92deb76f0bd3e6a6e3cf64