[INFO] fetching crate palombe 0.5.1...
[INFO] checking palombe-0.5.1 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate palombe 0.5.1 into /workspace/builds/worker-35/source
[INFO] validating manifest of crates.io crate palombe 0.5.1 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate palombe 0.5.1
[INFO] finished tweaking crates.io crate palombe 0.5.1
[INFO] tweaked toml for crates.io crate palombe 0.5.1 written to /workspace/builds/worker-35/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "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" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "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-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ec4179a3d30dc8c62e30e406689d9bcd0f0dac45281b73878da3d7d91bfb7124
[INFO] running `Command { std: "docker" "start" "-a" "ec4179a3d30dc8c62e30e406689d9bcd0f0dac45281b73878da3d7d91bfb7124", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec4179a3d30dc8c62e30e406689d9bcd0f0dac45281b73878da3d7d91bfb7124", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec4179a3d30dc8c62e30e406689d9bcd0f0dac45281b73878da3d7d91bfb7124", kill_on_drop: false }`
[INFO] [stdout] ec4179a3d30dc8c62e30e406689d9bcd0f0dac45281b73878da3d7d91bfb7124
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a672cd980e9c3c20ec55b57cfbd7766888875b56a8b3c5d03357d29d51cdee0
[INFO] running `Command { std: "docker" "start" "-a" "6a672cd980e9c3c20ec55b57cfbd7766888875b56a8b3c5d03357d29d51cdee0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.102
[INFO] [stderr]     Checking palombe v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `CString`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:180:47
[INFO] [stdout]     |
[INFO] [stdout] 180 | 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: `extern` fn uses type `std::ffi::CString`, which is not FFI-safe
[INFO] [stdout]    --> src/lib.rs:180:47
[INFO] [stdout]     |
[INFO] [stdout] 180 | 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 59.78s
[INFO] running `Command { std: "docker" "inspect" "6a672cd980e9c3c20ec55b57cfbd7766888875b56a8b3c5d03357d29d51cdee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a672cd980e9c3c20ec55b57cfbd7766888875b56a8b3c5d03357d29d51cdee0", kill_on_drop: false }`
[INFO] [stdout] 6a672cd980e9c3c20ec55b57cfbd7766888875b56a8b3c5d03357d29d51cdee0