[INFO] fetching crate palombe 0.5.1...
[INFO] testing palombe-0.5.1 against 1.59.0 for beta-1.60-1
[INFO] extracting crate palombe 0.5.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate palombe 0.5.1 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1bced078d0e41bcb703e239242d1a23c293f9583a95226528cfc50a9fcbc0590
[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" "1bced078d0e41bcb703e239242d1a23c293f9583a95226528cfc50a9fcbc0590", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1bced078d0e41bcb703e239242d1a23c293f9583a95226528cfc50a9fcbc0590", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bced078d0e41bcb703e239242d1a23c293f9583a95226528cfc50a9fcbc0590", kill_on_drop: false }`
[INFO] [stdout] 1bced078d0e41bcb703e239242d1a23c293f9583a95226528cfc50a9fcbc0590
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ecc8431e527112bc11aac06b9f8c7483a2649b8e5f7bbe33960350638be52f0a
[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" "ecc8431e527112bc11aac06b9f8c7483a2649b8e5f7bbe33960350638be52f0a", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.24s
[INFO] running `Command { std: "docker" "inspect" "ecc8431e527112bc11aac06b9f8c7483a2649b8e5f7bbe33960350638be52f0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecc8431e527112bc11aac06b9f8c7483a2649b8e5f7bbe33960350638be52f0a", kill_on_drop: false }`
[INFO] [stdout] ecc8431e527112bc11aac06b9f8c7483a2649b8e5f7bbe33960350638be52f0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] dee781af07846839eec31da6aca3d187da04e190f0519fb2faa92b5ca18820d2
[INFO] running `Command { std: "docker" "start" "-a" "dee781af07846839eec31da6aca3d187da04e190f0519fb2faa92b5ca18820d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling palombe v0.5.1 (/opt/rustwide/workdir)
[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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `Command { std: "docker" "inspect" "dee781af07846839eec31da6aca3d187da04e190f0519fb2faa92b5ca18820d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dee781af07846839eec31da6aca3d187da04e190f0519fb2faa92b5ca18820d2", kill_on_drop: false }`
[INFO] [stdout] dee781af07846839eec31da6aca3d187da04e190f0519fb2faa92b5ca18820d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e1eb9e8618401489b4fab593ed9fbb2b3e616c72e27e5d2cf2e12cd54e71deea
[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" "e1eb9e8618401489b4fab593ed9fbb2b3e616c72e27e5d2cf2e12cd54e71deea", kill_on_drop: false }`
[INFO] [stderr] warning: `extern` fn uses type `std::ffi::CString`, which is not FFI-safe
[INFO] [stderr]    --> src/lib.rs:180:47
[INFO] [stderr]     |
[INFO] [stderr] 180 | pub extern "C" fn c_receive(key: &CString) -> CString {
[INFO] [stderr]     |                                               ^^^^^^^ not FFI-safe
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stderr]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stderr]     = note: this struct has unspecified layout
[INFO] [stderr] 
[INFO] [stderr] warning: `palombe` (lib test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/palombe-78044e0cab082140)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::c_string ... ok
[INFO] [stdout] test tests::string ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e1eb9e8618401489b4fab593ed9fbb2b3e616c72e27e5d2cf2e12cd54e71deea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1eb9e8618401489b4fab593ed9fbb2b3e616c72e27e5d2cf2e12cd54e71deea", kill_on_drop: false }`
[INFO] [stdout] e1eb9e8618401489b4fab593ed9fbb2b3e616c72e27e5d2cf2e12cd54e71deea