[INFO] cloning repository https://github.com/DeadNumbers/rust-cffi-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DeadNumbers/rust-cffi-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDeadNumbers%2Frust-cffi-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDeadNumbers%2Frust-cffi-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 87f9a891e2749e39cddd2eb552d4da845e94be69
[INFO] checking DeadNumbers/rust-cffi-example against master#195ad4830e11a544391abe296b146450dea8411b for pr-82781
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDeadNumbers%2Frust-cffi-example" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DeadNumbers/rust-cffi-example on toolchain 195ad4830e11a544391abe296b146450dea8411b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DeadNumbers/rust-cffi-example
[INFO] finished tweaking git repo https://github.com/DeadNumbers/rust-cffi-example
[INFO] tweaked toml for git repo https://github.com/DeadNumbers/rust-cffi-example written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/DeadNumbers/rust-cffi-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] acd5a6329231df21c407c16454d34a7cfbf8f3f83c3da022b92e5f9f2475eeb2
[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" "acd5a6329231df21c407c16454d34a7cfbf8f3f83c3da022b92e5f9f2475eeb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "acd5a6329231df21c407c16454d34a7cfbf8f3f83c3da022b92e5f9f2475eeb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acd5a6329231df21c407c16454d34a7cfbf8f3f83c3da022b92e5f9f2475eeb2", kill_on_drop: false }`
[INFO] [stdout] acd5a6329231df21c407c16454d34a7cfbf8f3f83c3da022b92e5f9f2475eeb2
[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=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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25593bf42dee6cf287f1a8c050a40814eb541dcc94bd45a69d0ec034aebc887b
[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" "25593bf42dee6cf287f1a8c050a40814eb541dcc94bd45a69d0ec034aebc887b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` block uses type `str`, which is not FFI-safe
[INFO] [stdout]  --> src/main.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn hello(args: &str) -> i32;
[INFO] [stdout]   |                    ^^^^ not FFI-safe
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout]   = help: consider using `*const u8` and a length instead
[INFO] [stdout]   = note: string slices have no C equivalent
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `str`, which is not FFI-safe
[INFO] [stdout]  --> src/main.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn hello(args: &str) -> i32;
[INFO] [stdout]   |                    ^^^^ not FFI-safe
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout]   = help: consider using `*const u8` and a length instead
[INFO] [stdout]   = note: string slices have no C equivalent
[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 1.41s
[INFO] running `Command { std: "docker" "inspect" "25593bf42dee6cf287f1a8c050a40814eb541dcc94bd45a69d0ec034aebc887b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25593bf42dee6cf287f1a8c050a40814eb541dcc94bd45a69d0ec034aebc887b", kill_on_drop: false }`
[INFO] [stdout] 25593bf42dee6cf287f1a8c050a40814eb541dcc94bd45a69d0ec034aebc887b