[INFO] fetching crate expose 0.1.1...
[INFO] checking expose-0.1.1 against beta for pr-78714
[INFO] extracting crate expose 0.1.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate expose 0.1.1 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate expose 0.1.1
[INFO] finished tweaking crates.io crate expose 0.1.1
[INFO] tweaked toml for crates.io crate expose 0.1.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ac4e6593dbeb499d184d18dbce668d2020e64adf32f58fac1982a19bf50fd6c
[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" "4ac4e6593dbeb499d184d18dbce668d2020e64adf32f58fac1982a19bf50fd6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ac4e6593dbeb499d184d18dbce668d2020e64adf32f58fac1982a19bf50fd6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ac4e6593dbeb499d184d18dbce668d2020e64adf32f58fac1982a19bf50fd6c", kill_on_drop: false }`
[INFO] [stdout] 4ac4e6593dbeb499d184d18dbce668d2020e64adf32f58fac1982a19bf50fd6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--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] 72683c46c3b94a8ddcb50ca9daa4969d3d77ac162aba2bf8187abce8e7598983
[INFO] running `Command { std: "docker" "start" "-a" "72683c46c3b94a8ddcb50ca9daa4969d3d77ac162aba2bf8187abce8e7598983", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling cbindgen v0.8.7
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking proc-macro2 v0.4.30
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]     Checking expose v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `String`, which is not FFI-safe
[INFO] [stdout]   --> tests/smoke.rs:11:49
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn test_more_complex(x: i32, y: i32, z: String) -> String {
[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 `String`, which is not FFI-safe
[INFO] [stdout]   --> tests/smoke.rs:11:60
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn test_more_complex(x: i32, y: i32, z: String) -> String {
[INFO] [stdout]    |                                                            ^^^^^^ not FFI-safe
[INFO] [stdout]    |
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.19s
[INFO] running `Command { std: "docker" "inspect" "72683c46c3b94a8ddcb50ca9daa4969d3d77ac162aba2bf8187abce8e7598983", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72683c46c3b94a8ddcb50ca9daa4969d3d77ac162aba2bf8187abce8e7598983", kill_on_drop: false }`
[INFO] [stdout] 72683c46c3b94a8ddcb50ca9daa4969d3d77ac162aba2bf8187abce8e7598983