[INFO] cloning repository https://github.com/junkpiano/rust-swift-binding
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/junkpiano/rust-swift-binding" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjunkpiano%2Frust-swift-binding", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjunkpiano%2Frust-swift-binding'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2b63a7935ac9398bfb70cd4853904630b3176e41
[INFO] checking junkpiano/rust-swift-binding against 6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa for pr-159356
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjunkpiano%2Frust-swift-binding" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/junkpiano/rust-swift-binding
[INFO] finished tweaking git repo https://github.com/junkpiano/rust-swift-binding
[INFO] tweaked toml for git repo https://github.com/junkpiano/rust-swift-binding written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/junkpiano/rust-swift-binding on toolchain 6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/junkpiano/rust-swift-binding already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1fa6594d87c8fa7b311925a7a77a16f539833322d9dfba4ce891f211db2f90b1" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 5a964e7bd806a89b95194bb6880b85813c86777e483f09ebfa04e62b80aa760d
[INFO] running `Command { std: "docker" "start" "5a964e7bd806a89b95194bb6880b85813c86777e483f09ebfa04e62b80aa760d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a964e7bd806a89b95194bb6880b85813c86777e483f09ebfa04e62b80aa760d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5a964e7bd806a89b95194bb6880b85813c86777e483f09ebfa04e62b80aa760d" "/opt/rustwide/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a964e7bd806a89b95194bb6880b85813c86777e483f09ebfa04e62b80aa760d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5a964e7bd806a89b95194bb6880b85813c86777e483f09ebfa04e62b80aa760d" "/opt/rustwide/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking munchausen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]  --> src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub extern fn rust_munchausen_numbers() -> *mut [i32; 4] {
[INFO] [stdout]   |     ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]  --> src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub extern fn rust_munchausen_numbers() -> *mut [i32; 4] {
[INFO] [stdout]   |     ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stdout] warning: function returns a dangling pointer to dropped local variable `munchausen_num`
[INFO] [stdout]   --> src/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout]  2 | pub extern fn rust_munchausen_numbers() -> *mut [i32; 4] {
[INFO] [stdout]    |                                            ------------- return type is `*mut [i32; 4]`
[INFO] [stdout] ...
[INFO] [stdout]  5 |     let mut munchausen_num: [i32; 4] = [0; 4];
[INFO] [stdout]    |         ------------------ local variable `munchausen_num` is dropped at the end of the function
[INFO] [stdout]  6 |     let munchausen_num_ptr: *mut [i32; 4] = &mut munchausen_num;
[INFO] [stdout]    |                                             ------------------- dangling pointer created here
[INFO] [stdout] ...
[INFO] [stdout] 15 |     munchausen_num_ptr
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout]    = note: `#[warn(dangling_pointers_from_locals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function returns a dangling pointer to dropped local variable `munchausen_num`
[INFO] [stdout]   --> src/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout]  2 | pub extern fn rust_munchausen_numbers() -> *mut [i32; 4] {
[INFO] [stdout]    |                                            ------------- return type is `*mut [i32; 4]`
[INFO] [stdout] ...
[INFO] [stdout]  5 |     let mut munchausen_num: [i32; 4] = [0; 4];
[INFO] [stdout]    |         ------------------ local variable `munchausen_num` is dropped at the end of the function
[INFO] [stdout]  6 |     let munchausen_num_ptr: *mut [i32; 4] = &mut munchausen_num;
[INFO] [stdout]    |                                             ------------------- dangling pointer created here
[INFO] [stdout] ...
[INFO] [stdout] 15 |     munchausen_num_ptr
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout]    = note: `#[warn(dangling_pointers_from_locals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5a964e7bd806a89b95194bb6880b85813c86777e483f09ebfa04e62b80aa760d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a964e7bd806a89b95194bb6880b85813c86777e483f09ebfa04e62b80aa760d", kill_on_drop: false }`
[INFO] [stdout] 5a964e7bd806a89b95194bb6880b85813c86777e483f09ebfa04e62b80aa760d
