[INFO] fetching crate otter-nif 0.3.1...
[INFO] checking otter-nif-0.3.1 against 40527f3e444fde1deb361751bdef9b9e11d1b971+rustflags=--cfg crater_hack --force-warn invalid-c-variadic-arguments for pr-162478
[INFO] extracting crate otter-nif 0.3.1 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate otter-nif 0.3.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate otter-nif 0.3.1
[INFO] tweaked toml for crates.io crate otter-nif 0.3.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate otter-nif 0.3.1 on toolchain 40527f3e444fde1deb361751bdef9b9e11d1b971
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate otter-nif 0.3.1 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" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: explicit `package.readme` can be inferred
[INFO] [stderr]   --> Cargo.toml:39:1
[INFO] [stderr]    |
[INFO] [stderr] 39 | readme = "README.md"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::manual_readme` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.readme`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.repository`
[INFO] [stderr]   --> Cargo.toml:35:12
[INFO] [stderr]    |
[INFO] [stderr] 35 | homepage = "https://github.com/cubelio/otter"
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 40 | repository = "https://github.com/cubelio/otter"
[INFO] [stderr]    |              ----------------------------------
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `otter-nif` (manifest) generated 2 warnings
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 99a21067681fb2dce5f81b5404fd59d10b008312e0edfbc94e128ba71655d870
[INFO] running `Command { std: "docker" "start" "99a21067681fb2dce5f81b5404fd59d10b008312e0edfbc94e128ba71655d870", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99a21067681fb2dce5f81b5404fd59d10b008312e0edfbc94e128ba71655d870", 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" "99a21067681fb2dce5f81b5404fd59d10b008312e0edfbc94e128ba71655d870" "/opt/rustwide/cargo-home/bin/cargo" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99a21067681fb2dce5f81b5404fd59d10b008312e0edfbc94e128ba71655d870", 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 --cfg crater_hack --force-warn invalid-c-variadic-arguments" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "99a21067681fb2dce5f81b5404fd59d10b008312e0edfbc94e128ba71655d870" "/opt/rustwide/cargo-home/bin/cargo" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: explicit `package.readme` can be inferred
[INFO] [stderr]   --> Cargo.toml:39:1
[INFO] [stderr]    |
[INFO] [stderr] 39 | readme = "README.md"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::manual_readme` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.readme`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.repository`
[INFO] [stderr]   --> Cargo.toml:35:12
[INFO] [stderr]    |
[INFO] [stderr] 35 | homepage = "https://github.com/cubelio/otter"
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 40 | repository = "https://github.com/cubelio/otter"
[INFO] [stderr]    |              ----------------------------------
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `otter-nif` (manifest) generated 2 warnings
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling target-triple v1.0.0
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]     Checking enif-ffi v0.2.0
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `unsafe extern "C" fn(*mut c_void)`.
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/enif-ffi-0.2.0/src/api.rs:3866:55
[INFO] [stdout]      |
[INFO] [stdout] 3866 |     unsafe { (api().set_option)(env, Option_::OnHalt, on_halt) }
[INFO] [stdout]      |                                                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `unsafe extern "C" fn(*mut c_void)` does not implement `VaArgSafe`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/enif-ffi-0.2.0/src/api.rs:3866:55
[INFO] [stdout]      |
[INFO] [stdout] 3866 |     unsafe { (api().set_option)(env, Option_::OnHalt, on_halt) }
[INFO] [stdout]      |                                                       ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: values passed as C-variadic arguments must implement `core::ffi::VaArgSafe`
[INFO] [stdout]      = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]      = note: for more information, see issue #162483 <https://github.com/rust-lang/rust/issues/162483>
[INFO] [stdout]      = note: requested on the command line with `--force-warn invalid-c-variadic-arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `unsafe extern "C" fn(*mut c_void)`.
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/enif-ffi-0.2.0/src/api.rs:3891:63
[INFO] [stdout]      |
[INFO] [stdout] 3891 |     unsafe { (api().set_option)(env, Option_::OnUnloadThread, on_unload_thread) }
[INFO] [stdout]      |                                                               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `unsafe extern "C" fn(*mut c_void)` does not implement `VaArgSafe`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/enif-ffi-0.2.0/src/api.rs:3891:63
[INFO] [stdout]      |
[INFO] [stdout] 3891 |     unsafe { (api().set_option)(env, Option_::OnUnloadThread, on_unload_thread) }
[INFO] [stdout]      |                                                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: values passed as C-variadic arguments must implement `core::ffi::VaArgSafe`
[INFO] [stdout]      = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]      = note: for more information, see issue #162483 <https://github.com/rust-lang/rust/issues/162483>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `enif-ffi` (lib) due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "99a21067681fb2dce5f81b5404fd59d10b008312e0edfbc94e128ba71655d870", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99a21067681fb2dce5f81b5404fd59d10b008312e0edfbc94e128ba71655d870", kill_on_drop: false }`
[INFO] [stdout] 99a21067681fb2dce5f81b5404fd59d10b008312e0edfbc94e128ba71655d870
