[INFO] fetching crate mcp-bridge-rs-utcp 1.0.0...
[INFO] checking mcp-bridge-rs-utcp-1.0.0 against 40527f3e444fde1deb361751bdef9b9e11d1b971+rustflags=--cfg crater_hack --force-warn invalid-c-variadic-arguments for pr-162478
[INFO] extracting crate mcp-bridge-rs-utcp 1.0.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate mcp-bridge-rs-utcp 1.0.0
[INFO] finished tweaking crates.io crate mcp-bridge-rs-utcp 1.0.0
[INFO] tweaked toml for crates.io crate mcp-bridge-rs-utcp 1.0.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mcp-bridge-rs-utcp 1.0.0 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 mcp-bridge-rs-utcp 1.0.0 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:54:1
[INFO] [stderr]    |
[INFO] [stderr] 54 | 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: `mcp-bridge-rs-utcp` (manifest) generated 1 warning
[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@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 7431b1b55061ef883be88bb522687a227955f06f2722142f9add5aac03064b63
[INFO] running `Command { std: "docker" "start" "7431b1b55061ef883be88bb522687a227955f06f2722142f9add5aac03064b63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7431b1b55061ef883be88bb522687a227955f06f2722142f9add5aac03064b63", 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" "7431b1b55061ef883be88bb522687a227955f06f2722142f9add5aac03064b63" "/opt/rustwide/cargo-home/bin/cargo" "+40527f3e444fde1deb361751bdef9b9e11d1b971" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7431b1b55061ef883be88bb522687a227955f06f2722142f9add5aac03064b63", 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" "7431b1b55061ef883be88bb522687a227955f06f2722142f9add5aac03064b63" "/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:54:1
[INFO] [stderr]    |
[INFO] [stderr] 54 | 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: `mcp-bridge-rs-utcp` (manifest) generated 1 warning
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]     Checking bytes v1.11.0
[INFO] [stderr]    Compiling find-msvc-tools v0.1.5
[INFO] [stderr]     Checking memchr v2.7.6
[INFO] [stderr]    Compiling zerocopy v0.8.30
[INFO] [stderr]     Checking log v0.4.28
[INFO] [stderr]    Compiling portable-atomic v1.11.1
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]     Checking slab v0.4.11
[INFO] [stderr]     Checking litemap v0.8.1
[INFO] [stderr]     Checking writeable v0.6.2
[INFO] [stderr]    Compiling icu_properties_data v2.1.1
[INFO] [stderr]    Compiling anyhow v1.0.100
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling time-core v0.1.6
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]    Compiling cc v1.2.47
[INFO] [stderr]     Checking deranged v0.5.5
[INFO] [stderr]     Checking hashbrown v0.16.1
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling time-macros v0.2.24
[INFO] [stderr]    Compiling itertools v0.12.1
[INFO] [stderr]     Checking crc-catalog v2.4.0
[INFO] [stderr]    Compiling rustix v1.1.2
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]     Checking http v0.2.12
[INFO] [stderr]     Checking crc v3.4.0
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking data-encoding v2.9.0
[INFO] [stderr]    Compiling linux-raw-sys v0.11.0
[INFO] [stderr]     Checking once_cell v1.21.3
[INFO] [stderr]     Checking bitflags v2.10.0
[INFO] [stderr]    Compiling oid-registry v0.6.1
[INFO] [stderr]     Checking tracing-core v0.1.35
[INFO] [stderr]    Compiling regex-syntax v0.8.8
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking indexmap v2.12.1
[INFO] [stderr]    Compiling openssl v0.10.75
[INFO] [stderr]    Compiling syn v2.0.111
[INFO] [stderr]     Checking http-body v0.4.6
[INFO] [stderr]     Checking aho-corasick v1.1.4
[INFO] [stderr]     Checking time v0.3.44
[INFO] [stderr]    Compiling curve25519-dalek v4.1.3
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling fastrand v2.3.0
[INFO] [stderr]     Checking simd-adler32 v0.3.7
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking miniz_oxide v0.8.9
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking socket2 v0.6.1
[INFO] [stderr]     Checking mio v1.1.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.7
[INFO] [stderr]     Checking nix v0.26.4
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling openssl-sys v0.9.111
[INFO] [stderr]     Checking socket2 v0.5.10
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking ff v0.13.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling petgraph v0.6.5
[INFO] [stderr]     Checking group v0.13.0
[INFO] [stderr]    Compiling axum-core v0.3.4
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling substring v1.4.5
[INFO] [stderr]    Compiling native-tls v0.2.14
[INFO] [stderr]     Checking base64 v0.22.1
[INFO] [stderr]     Checking arc-swap v1.7.1
[INFO] [stderr]     Checking rusticata-macros v4.1.0
[INFO] [stderr]    Compiling rustls v0.21.12
[INFO] [stderr]     Checking pem v3.0.6
[INFO] [stderr]     Checking waitgroup v0.1.2
[INFO] [stderr]    Compiling const-random-macro v0.1.16
[INFO] [stderr]     Checking brotli v8.0.2
[INFO] [stderr]     Checking flate2 v1.1.5
[INFO] [stderr]    Compiling axum v0.6.20
[INFO] [stderr]    Compiling regex-automata v0.4.13
[INFO] [stderr]     Checking yasna v0.5.2
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling smartstring v1.0.1
[INFO] [stderr]    Compiling tempfile v3.23.0
[INFO] [stderr]     Checking const-random v0.1.18
[INFO] [stderr]     Checking uuid v1.18.1
[INFO] [stderr]     Checking http v1.4.0
[INFO] [stderr]     Checking rustls-pemfile v1.0.4
[INFO] [stderr]     Checking unsafe-libyaml v0.2.11
[INFO] [stderr]     Checking eventsource-stream v0.2.3
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]    Compiling regex v1.12.2
[INFO] [stderr]    Compiling rustls v0.22.4
[INFO] [stdout] error: CRATER ERROR: C-variadic argument with type `AtFlags`.
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nix-0.26.4/src/unistd.rs:929:56
[INFO] [stdout]     |
[INFO] [stdout] 929 |                       args_p.as_ptr(), env_p.as_ptr(), flags);
[INFO] [stdout]     |                                                        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `AtFlags` does not implement `VaArgSafe`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nix-0.26.4/src/unistd.rs:929:56
[INFO] [stdout]     |
[INFO] [stdout] 929 |                       args_p.as_ptr(), env_p.as_ptr(), flags);
[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] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr] error: could not compile `nix` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7431b1b55061ef883be88bb522687a227955f06f2722142f9add5aac03064b63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7431b1b55061ef883be88bb522687a227955f06f2722142f9add5aac03064b63", kill_on_drop: false }`
[INFO] [stdout] 7431b1b55061ef883be88bb522687a227955f06f2722142f9add5aac03064b63
