[INFO] fetching crate mergelog 0.2.0...
[INFO] testing mergelog-0.2.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate mergelog 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate mergelog 0.2.0
[INFO] finished tweaking crates.io crate mergelog 0.2.0
[INFO] tweaked toml for crates.io crate mergelog 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mergelog 0.2.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mergelog 0.2.0 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" "+beta-2026-04-21" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b6923344595b6b6e8e89c4d417848bb3062c9fa7b4bfb926474bbc1ffde5510
[INFO] running `Command { std: "docker" "start" "-a" "6b6923344595b6b6e8e89c4d417848bb3062c9fa7b4bfb926474bbc1ffde5510", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b6923344595b6b6e8e89c4d417848bb3062c9fa7b4bfb926474bbc1ffde5510", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b6923344595b6b6e8e89c4d417848bb3062c9fa7b4bfb926474bbc1ffde5510", kill_on_drop: false }`
[INFO] [stdout] 6b6923344595b6b6e8e89c4d417848bb3062c9fa7b4bfb926474bbc1ffde5510
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e4e9c42e3677685e19ec9568a38db4018c44ee2280a07acb157374701422f634
[INFO] running `Command { std: "docker" "start" "-a" "e4e9c42e3677685e19ec9568a38db4018c44ee2280a07acb157374701422f634", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.16
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]    Compiling pkg-config v0.3.31
[INFO] [stderr]    Compiling serde v1.0.217
[INFO] [stderr]    Compiling once_cell v1.20.3
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling itoa v1.0.14
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.16
[INFO] [stderr]    Compiling hashbrown v0.15.2
[INFO] [stderr]    Compiling bytes v1.10.0
[INFO] [stderr]    Compiling cc v1.2.14
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling bitflags v2.8.0
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling litemap v0.7.4
[INFO] [stderr]    Compiling smallvec v1.14.0
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling futures-io v0.3.31
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling adler2 v2.0.0
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling icu_locid_transform_data v1.5.0
[INFO] [stderr]    Compiling rustix v0.38.44
[INFO] [stderr]    Compiling tracing-core v0.1.33
[INFO] [stderr]    Compiling miniz_oxide v0.8.4
[INFO] [stderr]    Compiling icu_properties_data v1.5.0
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling ryu v1.0.19
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling httparse v1.10.0
[INFO] [stderr]    Compiling http v1.2.0
[INFO] [stderr]    Compiling linux-raw-sys v0.4.15
[INFO] [stderr]    Compiling indexmap v2.7.1
[INFO] [stderr]    Compiling openssl v0.10.71
[INFO] [stderr]    Compiling deranged v0.3.11
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling icu_normalizer_data v1.5.0
[INFO] [stderr]    Compiling object v0.36.7
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]    Compiling prettyplease v0.2.29
[INFO] [stderr]    Compiling mio v1.0.3
[INFO] [stderr]    Compiling socket2 v0.5.8
[INFO] [stderr]    Compiling utf8parse v0.2.2
[INFO] [stderr]    Compiling utf16_iter v1.0.5
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]    Compiling serde_json v1.0.138
[INFO] [stderr]    Compiling write16 v1.0.0
[INFO] [stderr]    Compiling native-tls v0.2.13
[INFO] [stderr]    Compiling rustversion v1.0.19
[INFO] [stderr]    Compiling anstyle-parse v0.2.6
[INFO] [stderr]    Compiling quick-xml v0.32.0
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling crc32fast v1.4.2
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling log v0.4.25
[INFO] [stderr]    Compiling percent-encoding v2.3.1
[INFO] [stderr]    Compiling colorchoice v1.0.3
[INFO] [stderr]    Compiling linked-hash-map v0.5.6
[INFO] [stderr]    Compiling anstyle v1.0.10
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling time v0.3.37
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.1
[INFO] [stderr]    Compiling gimli v0.31.1
[INFO] [stderr]    Compiling anstyle-query v1.1.2
[INFO] [stderr]    Compiling openssl-probe v0.1.6
[INFO] [stderr]    Compiling walkdir v2.5.0
[INFO] [stderr]    Compiling anstream v0.6.18
[INFO] [stderr]    Compiling form_urlencoded v1.2.1
[INFO] [stderr]    Compiling tinyvec v1.8.1
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling terminal_size v0.4.1
[INFO] [stderr]    Compiling tokio v1.43.0
[INFO] [stderr]    Compiling flate2 v1.0.35
[INFO] [stderr]    Compiling owo-colors v4.1.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.24
[INFO] [stderr]    Compiling clap_lex v0.7.4
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling portable-atomic v1.10.0
[INFO] [stderr]    Compiling clap_builder v4.5.30
[INFO] [stderr]    Compiling unicode-normalization v0.1.24
[INFO] [stderr]    Compiling sync_wrapper v1.0.2
[INFO] [stderr]    Compiling unicode-width v0.1.14
[INFO] [stderr]    Compiling deunicode v1.6.0
[INFO] [stderr]    Compiling rustls-pki-types v1.11.0
[INFO] [stderr]    Compiling winnow v0.7.2
[INFO] [stderr]    Compiling argh_shared v0.1.13
[INFO] [stderr]    Compiling unicode-linebreak v0.1.5
[INFO] [stderr]    Compiling openssl-sys v0.9.106
[INFO] [stderr]    Compiling onig_sys v69.8.1
[INFO] [stderr]    Compiling camino v1.1.9
[INFO] [stderr]    Compiling is_ci v1.2.0
[INFO] [stderr]    Compiling unicode-width v0.2.0
[INFO] [stderr]    Compiling supports-color v3.0.2
[INFO] [stderr]    Compiling rustls-pemfile v2.2.0
[INFO] [stderr]    Compiling textwrap v0.16.1
[INFO] [stderr]    Compiling console v0.15.10
[INFO] [stderr]    Compiling slug v0.1.6
[INFO] [stderr]    Compiling caseless v0.2.2
[INFO] [stderr]    Compiling encoding_rs v0.8.35
[INFO] [stderr]    Compiling ipnet v2.11.0
[INFO] [stderr]    Compiling number_prefix v0.4.0
[INFO] [stderr]    Compiling rust-fuzzy-search v0.1.1
[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-2026-04-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.98/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="visit"' --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=220f9e7f30529554 -C extra-filename=-0481175dc83813ec --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-634e0439bf5adfe1.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-376f628d8d546e15.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-cf571e428a2ad4d6.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e4e9c42e3677685e19ec9568a38db4018c44ee2280a07acb157374701422f634", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4e9c42e3677685e19ec9568a38db4018c44ee2280a07acb157374701422f634", kill_on_drop: false }`
[INFO] [stdout] e4e9c42e3677685e19ec9568a38db4018c44ee2280a07acb157374701422f634
