[INFO] cloning repository https://github.com/tiagocoutinho/tc-rusty
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tiagocoutinho/tc-rusty" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiagocoutinho%2Ftc-rusty", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiagocoutinho%2Ftc-rusty'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 81dfdf5a067644f6fb1adb9cf557e8755a3dbf37
[INFO] checking tiagocoutinho/tc-rusty against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiagocoutinho%2Ftc-rusty" "/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/tiagocoutinho/tc-rusty on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tiagocoutinho/tc-rusty
[INFO] finished tweaking git repo https://github.com/tiagocoutinho/tc-rusty
[INFO] tweaked toml for git repo https://github.com/tiagocoutinho/tc-rusty written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/tiagocoutinho/tc-rusty already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3d8c260295c5ace66f0a13d80338895c5cbe3775da4ef6375dfc6457fe7605cd
[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" "3d8c260295c5ace66f0a13d80338895c5cbe3775da4ef6375dfc6457fe7605cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d8c260295c5ace66f0a13d80338895c5cbe3775da4ef6375dfc6457fe7605cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d8c260295c5ace66f0a13d80338895c5cbe3775da4ef6375dfc6457fe7605cd", kill_on_drop: false }`
[INFO] [stdout] 3d8c260295c5ace66f0a13d80338895c5cbe3775da4ef6375dfc6457fe7605cd
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92a07a967cbab0f3c832239e21461a403c19081afa56c8a4fe55c1e46843bd24
[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" "92a07a967cbab0f3c832239e21461a403c19081afa56c8a4fe55c1e46843bd24", kill_on_drop: false }`
[INFO] [stderr]     Checking tc-rusty v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/lib.rs:28:41
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub extern fn count_doubles(val: &[u8], n: usize) -> i32 {
[INFO] [stdout]    |                                         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]   --> src/lib.rs:28:34
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub extern fn count_doubles(val: &[u8], n: usize) -> 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/lib.rs:28:41
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub extern fn count_doubles(val: &[u8], n: usize) -> i32 {
[INFO] [stdout]    |                                         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `[u8]`, which is not FFI-safe
[INFO] [stdout]   --> src/lib.rs:28:34
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub extern fn count_doubles(val: &[u8], n: usize) -> 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "92a07a967cbab0f3c832239e21461a403c19081afa56c8a4fe55c1e46843bd24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92a07a967cbab0f3c832239e21461a403c19081afa56c8a4fe55c1e46843bd24", kill_on_drop: false }`
[INFO] [stdout] 92a07a967cbab0f3c832239e21461a403c19081afa56c8a4fe55c1e46843bd24