[INFO] fetching crate reax 0.2.0...
[INFO] checking reax-0.2.0 against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] extracting crate reax 0.2.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate reax 0.2.0 on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate reax 0.2.0
[INFO] finished tweaking crates.io crate reax 0.2.0
[INFO] tweaked toml for crates.io crate reax 0.2.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate reax 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 09f31b9f1e8823a1f25218d4983e3e5e947a374de43871722ccedd75dd9dab7a
[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" "09f31b9f1e8823a1f25218d4983e3e5e947a374de43871722ccedd75dd9dab7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09f31b9f1e8823a1f25218d4983e3e5e947a374de43871722ccedd75dd9dab7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09f31b9f1e8823a1f25218d4983e3e5e947a374de43871722ccedd75dd9dab7a", kill_on_drop: false }`
[INFO] [stdout] 09f31b9f1e8823a1f25218d4983e3e5e947a374de43871722ccedd75dd9dab7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77729733208a224a353ec38688112d69f0fb4514c5563c1f7e18bad7ca3c51bb
[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" "77729733208a224a353ec38688112d69f0fb4514c5563c1f7e18bad7ca3c51bb", kill_on_drop: false }`
[INFO] [stderr]     Checking reax v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `extern` fn uses type `fn(*const ())`, which is not FFI-safe
[INFO] [stdout]    --> src/handler.rs:193:12
[INFO] [stdout]     |
[INFO] [stdout] 193 |     waker: fn(*const ()),
[INFO] [stdout]     |            ^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider using an `extern fn(...) -> ...` function pointer instead
[INFO] [stdout]     = note: this function pointer has Rust-specific calling convention
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `fn(*const ())`, which is not FFI-safe
[INFO] [stdout]    --> src/handler.rs:194:16
[INFO] [stdout]     |
[INFO] [stdout] 194 |     finalizer: fn(*const ()),
[INFO] [stdout]     |                ^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using an `extern fn(...) -> ...` function pointer instead
[INFO] [stdout]     = note: this function pointer has Rust-specific calling convention
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/handler.rs:224:5
[INFO] [stdout]     |
[INFO] [stdout] 224 |     ManuallyDrop::new(arc.clone());
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `fn(*const ())`, which is not FFI-safe
[INFO] [stdout]    --> src/handler.rs:193:12
[INFO] [stdout]     |
[INFO] [stdout] 193 |     waker: fn(*const ()),
[INFO] [stdout]     |            ^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider using an `extern fn(...) -> ...` function pointer instead
[INFO] [stdout]     = note: this function pointer has Rust-specific calling convention
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `fn(*const ())`, which is not FFI-safe
[INFO] [stdout]    --> src/handler.rs:194:16
[INFO] [stdout]     |
[INFO] [stdout] 194 |     finalizer: fn(*const ()),
[INFO] [stdout]     |                ^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using an `extern fn(...) -> ...` function pointer instead
[INFO] [stdout]     = note: this function pointer has Rust-specific calling convention
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `ManuallyDrop::<T>::new` that must be used
[INFO] [stdout]    --> src/handler.rs:224:5
[INFO] [stdout]     |
[INFO] [stdout] 224 |     ManuallyDrop::new(arc.clone());
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the wrapper, you can use `mem::forget` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `Command { std: "docker" "inspect" "77729733208a224a353ec38688112d69f0fb4514c5563c1f7e18bad7ca3c51bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77729733208a224a353ec38688112d69f0fb4514c5563c1f7e18bad7ca3c51bb", kill_on_drop: false }`
[INFO] [stdout] 77729733208a224a353ec38688112d69f0fb4514c5563c1f7e18bad7ca3c51bb