[INFO] cloning repository https://github.com/IRONICBo/c_buffer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/IRONICBo/c_buffer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIRONICBo%2Fc_buffer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIRONICBo%2Fc_buffer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ba8922b96007de3ea09517176ca692a4108fc4f
[INFO] testing IRONICBo/c_buffer against beta-2025-09-21 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIRONICBo%2Fc_buffer" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/IRONICBo/c_buffer
[INFO] finished tweaking git repo https://github.com/IRONICBo/c_buffer
[INFO] tweaked toml for git repo https://github.com/IRONICBo/c_buffer written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/IRONICBo/c_buffer on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/IRONICBo/c_buffer 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bcd9a2ea56d83288eb51e1784a85a947806baca4e4adae3bb396b409ed845a73
[INFO] running `Command { std: "docker" "start" "-a" "bcd9a2ea56d83288eb51e1784a85a947806baca4e4adae3bb396b409ed845a73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bcd9a2ea56d83288eb51e1784a85a947806baca4e4adae3bb396b409ed845a73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcd9a2ea56d83288eb51e1784a85a947806baca4e4adae3bb396b409ed845a73", kill_on_drop: false }`
[INFO] [stdout] bcd9a2ea56d83288eb51e1784a85a947806baca4e4adae3bb396b409ed845a73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a825c8e6ffb355a188cd230441bc338bc26d3a4f04af561b639e535b1898bb05
[INFO] running `Command { std: "docker" "start" "-a" "a825c8e6ffb355a188cd230441bc338bc26d3a4f04af561b639e535b1898bb05", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling const-oid v0.9.6
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling subtle v2.6.1
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling cc v1.1.18
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling bitflags v2.6.0
[INFO] [stderr]    Compiling target-lexicon v0.12.16
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling untrusted v0.9.0
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling cpufeatures v0.2.14
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling futures-io v0.3.30
[INFO] [stderr]    Compiling serde_json v1.0.128
[INFO] [stderr]    Compiling zeroize v1.8.1
[INFO] [stderr]    Compiling base64ct v1.6.0
[INFO] [stderr]    Compiling futures-channel v0.3.30
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling futures-task v0.3.30
[INFO] [stderr]    Compiling thiserror v1.0.63
[INFO] [stderr]    Compiling rustls v0.21.12
[INFO] [stderr]    Compiling indexmap v2.5.0
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling pem-rfc7468 v0.7.0
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]    Compiling fastrand v2.1.1
[INFO] [stderr]    Compiling rustix v0.38.36
[INFO] [stderr]    Compiling powerfmt v0.2.0
[INFO] [stderr]    Compiling futures-util v0.3.30
[INFO] [stderr]    Compiling der v0.7.9
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling deranged v0.3.11
[INFO] [stderr]    Compiling pyo3-build-config v0.16.6
[INFO] [stderr]    Compiling time-macros v0.2.18
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling linux-raw-sys v0.4.14
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling num-bigint-dig v0.8.4
[INFO] [stderr]    Compiling const-random-macro v0.1.16
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling os_str_bytes v6.6.1
[INFO] [stderr]    Compiling ring v0.17.8
[INFO] [stderr]    Compiling const-random v0.1.18
[INFO] [stderr]    Compiling dlv-list v0.5.2
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling textwrap v0.16.1
[INFO] [stderr]    Compiling procfs v0.16.0
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling protobuf v2.28.0
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling block-padding v0.3.3
[INFO] [stderr]    Compiling base64 v0.22.1
[INFO] [stderr]    Compiling anyhow v1.0.87
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling inout v0.1.3
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling cipher v0.4.4
[INFO] [stderr]    Compiling num-iter v0.1.45
[INFO] [stderr]    Compiling termcolor v1.4.1
[INFO] [stderr]    Compiling hmac v0.12.1
[INFO] [stderr]    Compiling signal-hook-registry v1.4.2
[INFO] [stderr]    Compiling mio v1.0.2
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling socket2 v0.5.7
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling salsa20 v0.10.2
[INFO] [stderr]    Compiling pbkdf2 v0.12.2
[INFO] [stderr]    Compiling sha2 v0.10.8
[INFO] [stderr]    Compiling spki v0.7.3
[INFO] [stderr]    Compiling cbc v0.1.2
[INFO] [stderr]    Compiling aes v0.8.4
[INFO] [stderr]    Compiling pyo3-ffi v0.16.6
[INFO] [stderr]    Compiling time v0.3.36
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling scrypt v0.11.0
[INFO] [stderr]    Compiling cbindgen v0.26.0
[INFO] [stderr]    Compiling rustls-native-certs v0.6.3
[INFO] [stderr]    Compiling clap v3.2.25
[INFO] [stderr]    Compiling signature v2.2.0
[INFO] [stderr]    Compiling pem v3.0.4
[INFO] [stderr]    Compiling pkcs5 v0.7.1
[INFO] [stderr]    Compiling ordered-multimap v0.7.3
[INFO] [stderr]    Compiling procfs-core v0.16.0
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]    Compiling iana-time-zone v0.1.60
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling pkcs8 v0.10.2
[INFO] [stderr]    Compiling prometheus v0.13.4
[INFO] [stderr]    Compiling pkcs1 v0.7.5
[INFO] [stderr]    Compiling ipnet v2.10.0
[INFO] [stderr]    Compiling chrono v0.4.38
[INFO] [stderr]    Compiling rust-ini v0.20.0
[INFO] [stderr]    Compiling nix v0.28.0
[INFO] [stderr]    Compiling tempfile v3.12.0
[INFO] [stderr]    Compiling pyo3 v0.16.6
[INFO] [stderr]    Compiling sha1 v0.10.6
[INFO] [stderr]    Compiling home v0.5.9
[INFO] [stderr]    Compiling futures v0.3.30
[INFO] [stderr]    Compiling md-5 v0.10.6
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling sharded-slab v0.1.7
[INFO] [stderr]    Compiling thread_local v1.1.8
[INFO] [stderr]    Compiling xml-rs v0.8.22
[INFO] [stderr]    Compiling indoc v1.0.9
[INFO] [stderr]    Compiling unindent v0.1.11
[INFO] [stderr]    Compiling flagset v0.4.6
[INFO] [stderr]    Compiling clippy-utilities v0.1.0
[INFO] [stderr]    Compiling tracing-subscriber v0.3.18
[INFO] [stderr]    Compiling pyo3-macros-backend v0.16.6
[INFO] [stderr] error: could not compile `syn` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2025-09-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.77/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="visit-mut"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "test", "visit", "visit-mut"))' -C metadata=039c810b5afc70bd -C extra-filename=-42c0cbf6f7a02059 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-31d473c435bae482.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-6c508e29bb318806.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-22b7b0cc8d73ac3c.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `syn` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2025-09-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-1.0.109/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "quote", "test", "visit", "visit-mut"))' -C metadata=6c5c282d011bc692 -C extra-filename=-81e373a3265c5bcd --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-31d473c435bae482.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-6c508e29bb318806.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-22b7b0cc8d73ac3c.rmeta --cap-lints allow --cap-lints=warn --cfg syn_disable_nightly_tests` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "a825c8e6ffb355a188cd230441bc338bc26d3a4f04af561b639e535b1898bb05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a825c8e6ffb355a188cd230441bc338bc26d3a4f04af561b639e535b1898bb05", kill_on_drop: false }`
[INFO] [stdout] a825c8e6ffb355a188cd230441bc338bc26d3a4f04af561b639e535b1898bb05