[INFO] fetching crate palombe 0.5.0...
[INFO] checking palombe-0.5.0 against try#8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346 for pr-86194
[INFO] extracting crate palombe 0.5.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate palombe 0.5.0 on toolchain 8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate palombe 0.5.0
[INFO] finished tweaking crates.io crate palombe 0.5.0
[INFO] tweaked toml for crates.io crate palombe 0.5.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a439b394220bd25d4824183045d1c88c789b55b4552bbcb0d10e1d30da0ea3e8
[INFO] running `Command { std: "docker" "start" "-a" "a439b394220bd25d4824183045d1c88c789b55b4552bbcb0d10e1d30da0ea3e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a439b394220bd25d4824183045d1c88c789b55b4552bbcb0d10e1d30da0ea3e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a439b394220bd25d4824183045d1c88c789b55b4552bbcb0d10e1d30da0ea3e8", kill_on_drop: false }`
[INFO] [stdout] a439b394220bd25d4824183045d1c88c789b55b4552bbcb0d10e1d30da0ea3e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d12d2c68b41be2b4833030228254a485890be1cc511f676a841bb0c205f07359
[INFO] running `Command { std: "docker" "start" "-a" "d12d2c68b41be2b4833030228254a485890be1cc511f676a841bb0c205f07359", kill_on_drop: false }`
[INFO] [stderr]     Checking palombe v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `std::ffi::CString`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:181:47
[INFO] [stdout]     |
[INFO] [stdout] 181 | pub extern "C" fn c_receive(key: &CString) -> CString {
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `CString`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:181:47
[INFO] [stdout]     |
[INFO] [stdout] 181 | pub extern "C" fn c_receive(key: &CString) -> CString {
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "d12d2c68b41be2b4833030228254a485890be1cc511f676a841bb0c205f07359", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d12d2c68b41be2b4833030228254a485890be1cc511f676a841bb0c205f07359", kill_on_drop: false }`
[INFO] [stdout] d12d2c68b41be2b4833030228254a485890be1cc511f676a841bb0c205f07359