[INFO] cloning repository https://github.com/ceyhunsony/rustffitest
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ceyhunsony/rustffitest" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fceyhunsony%2Frustffitest", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fceyhunsony%2Frustffitest'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 76879913d1fc51f82f732ffd6c1f2409c38233cf
[INFO] checking ceyhunsony/rustffitest against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fceyhunsony%2Frustffitest" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ceyhunsony/rustffitest on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ceyhunsony/rustffitest
[INFO] finished tweaking git repo https://github.com/ceyhunsony/rustffitest
[INFO] tweaked toml for git repo https://github.com/ceyhunsony/rustffitest written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/ceyhunsony/rustffitest already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 354c696a6207ec2048be76e9eb3427fc91d8ffdfaf10de53f2646d988465fe9c
[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" "354c696a6207ec2048be76e9eb3427fc91d8ffdfaf10de53f2646d988465fe9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "354c696a6207ec2048be76e9eb3427fc91d8ffdfaf10de53f2646d988465fe9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "354c696a6207ec2048be76e9eb3427fc91d8ffdfaf10de53f2646d988465fe9c", kill_on_drop: false }`
[INFO] [stdout] 354c696a6207ec2048be76e9eb3427fc91d8ffdfaf10de53f2646d988465fe9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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] 011dda5f709db9f3bbd7abb9b2cf87d69d245b8e693f5852db70c7af7847ebe4
[INFO] running `Command { std: "docker" "start" "-a" "011dda5f709db9f3bbd7abb9b2cf87d69d245b8e693f5852db70c7af7847ebe4", kill_on_drop: false }`
[INFO] [stderr]     Checking rustffitest v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]  --> src/lib.rs:4:48
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub extern fn testing_array(len: usize, input: &[u8]) -> i32 {
[INFO] [stdout]   |                                                ^^^^^ not FFI-safe
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]   = help: consider using a raw pointer instead
[INFO] [stdout]   = note: slices have no C equivalent
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]  --> src/lib.rs:4:48
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub extern fn testing_array(len: usize, input: &[u8]) -> i32 {
[INFO] [stdout]   |                                                ^^^^^ not FFI-safe
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]   = help: consider using a raw pointer instead
[INFO] [stdout]   = note: slices have no C equivalent
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "011dda5f709db9f3bbd7abb9b2cf87d69d245b8e693f5852db70c7af7847ebe4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "011dda5f709db9f3bbd7abb9b2cf87d69d245b8e693f5852db70c7af7847ebe4", kill_on_drop: false }`
[INFO] [stdout] 011dda5f709db9f3bbd7abb9b2cf87d69d245b8e693f5852db70c7af7847ebe4