[INFO] fetching crate alter 0.3.1...
[INFO] documenting alter-0.3.1 against beta-2026-04-21 for beta-1.96-rustdoc-1
[INFO] extracting crate alter 0.3.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate alter 0.3.1
[INFO] finished tweaking crates.io crate alter 0.3.1
[INFO] tweaked toml for crates.io crate alter 0.3.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate alter 0.3.1 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 alter 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" "+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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ad3a82cd413efa7848a4490ab8f083e71a532c2d293e0fb7b8c372dacb6f259d
[INFO] running `Command { std: "docker" "start" "-a" "ad3a82cd413efa7848a4490ab8f083e71a532c2d293e0fb7b8c372dacb6f259d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad3a82cd413efa7848a4490ab8f083e71a532c2d293e0fb7b8c372dacb6f259d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad3a82cd413efa7848a4490ab8f083e71a532c2d293e0fb7b8c372dacb6f259d", kill_on_drop: false }`
[INFO] [stdout] ad3a82cd413efa7848a4490ab8f083e71a532c2d293e0fb7b8c372dacb6f259d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6dd8f044371efd2655794209bb0ed5bc824fee09c8bfb0acf1efea0a7bcdee84
[INFO] running `Command { std: "docker" "start" "-a" "6dd8f044371efd2655794209bb0ed5bc824fee09c8bfb0acf1efea0a7bcdee84", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]     Checking regex-automata v0.4.13
[INFO] [stderr]     Checking futures-io v0.3.32
[INFO] [stderr]     Checking tinyvec v1.10.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]     Checking gix-trace v0.1.15
[INFO] [stderr]     Checking bitflags v2.11.0
[INFO] [stderr]    Compiling cc v1.2.56
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]    Compiling indexmap v2.12.1
[INFO] [stderr]    Compiling zerocopy v0.8.40
[INFO] [stderr]    Compiling rustix v1.1.2
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]     Checking http v1.4.0
[INFO] [stderr]     Checking hash32 v0.3.1
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]     Checking block-padding v0.3.3
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]     Checking sha1 v0.10.6
[INFO] [stderr]     Checking winnow v0.7.14
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]     Checking unicode-normalization v0.1.25
[INFO] [stderr]     Checking futures-lite v2.6.1
[INFO] [stderr]     Checking concurrent-queue v2.5.0
[INFO] [stderr]    Compiling syn v2.0.111
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling rustix v0.37.28
[INFO] [stderr]     Checking event-listener v5.4.1
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling openssl v0.10.76
[INFO] [stderr]     Checking futures-lite v1.13.0
[INFO] [stderr]     Checking event-listener-strategy v0.5.4
[INFO] [stderr]     Checking gix-utils v0.3.1
[INFO] [stderr]     Checking async-channel v2.5.0
[INFO] [stderr]     Checking http-body v1.0.1
[INFO] [stderr]     Checking sha1-checked v0.10.0
[INFO] [stderr]     Checking inout v0.1.4
[INFO] [stderr]     Checking async-lock v2.8.0
[INFO] [stderr]     Checking piper v0.2.5
[INFO] [stderr]    Compiling async-fs v1.6.0
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]     Checking jiff v0.2.16
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling native-tls v0.2.18
[INFO] [stderr]     Checking blocking v1.6.2
[INFO] [stderr]     Checking mio v1.1.0
[INFO] [stderr]     Checking socket2 v0.6.2
[INFO] [stderr]     Checking getrandom v0.3.4
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking io-lifetimes v1.0.11
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking socket2 v0.4.10
[INFO] [stderr]     Checking cipher v0.4.4
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking tokio v1.49.0
[INFO] [stderr]     Checking hashbrown v0.16.1
[INFO] [stderr]     Checking nix v0.26.4
[INFO] [stderr]     Checking xdg-home v1.3.0
[INFO] [stderr]    Compiling openssl-sys v0.9.112
[INFO] [stderr]     Checking async-executor v1.14.0
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking async-broadcast v0.5.1
[INFO] [stderr]     Checking ordered-stream v0.2.0
[INFO] [stderr]    Compiling getrandom v0.4.1
[INFO] [stderr]     Checking rand_core v0.10.0
[INFO] [stderr]     Checking hkdf v0.12.4
[INFO] [stderr]     Checking aes v0.8.4
[INFO] [stderr]     Checking cbc v0.1.2
[INFO] [stderr]     Checking memmap2 v0.9.9
[INFO] [stderr]     Checking http-body-util v0.1.3
[INFO] [stderr] error: could not compile `zerocopy` (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 zerocopy --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/zerocopy-0.8.40/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="simd"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("__internal_use_only_features_that_work_on_stable", "alloc", "derive", "float-nightly", "simd", "simd-nightly", "std", "zerocopy-derive"))' -C metadata=d0c04a4d4218e8c0 -C extra-filename=-5dfb3489e3f12df0 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow --cap-lints=warn --check-cfg 'cfg(no_zerocopy_simd_x86_avx12_1_89_0)' --check-cfg 'cfg(rust, values("1.89.0"))' --check-cfg 'cfg(no_zerocopy_core_error_1_81_0)' --check-cfg 'cfg(rust, values("1.81.0"))' --check-cfg 'cfg(no_zerocopy_diagnostic_on_unimplemented_1_78_0)' --check-cfg 'cfg(rust, values("1.78.0"))' --check-cfg 'cfg(no_zerocopy_generic_bounds_in_const_fn_1_61_0)' --check-cfg 'cfg(rust, values("1.61.0"))' --check-cfg 'cfg(no_zerocopy_target_has_atomics_1_60_0)' --check-cfg 'cfg(rust, values("1.60.0"))' --check-cfg 'cfg(no_zerocopy_aarch64_simd_1_59_0)' --check-cfg 'cfg(rust, values("1.59.0"))' --check-cfg 'cfg(no_zerocopy_panic_in_const_and_vec_try_reserve_1_57_0)' --check-cfg 'cfg(rust, values("1.57.0"))' --check-cfg 'cfg(doc_cfg)' --check-cfg 'cfg(kani)' --check-cfg 'cfg(__ZEROCOPY_INTERNAL_USE_ONLY_NIGHTLY_FEATURES_IN_TESTS)' --check-cfg 'cfg(__ZEROCOPY_INTERNAL_USE_ONLY_DEV_MODE)' --check-cfg 'cfg(coverage_nightly)'` (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-2026-04-21-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"' --cfg 'feature="visit"' --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=6fc2939ff6bca403 -C extra-filename=-7d3e3587a2934f90 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-2f6ea505ff82ebb0.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-39de46f98adae129.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-78d3da9d81f84e3e.rmeta --cap-lints allow --cap-lints=warn --cfg syn_disable_nightly_tests` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "6dd8f044371efd2655794209bb0ed5bc824fee09c8bfb0acf1efea0a7bcdee84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dd8f044371efd2655794209bb0ed5bc824fee09c8bfb0acf1efea0a7bcdee84", kill_on_drop: false }`
[INFO] [stdout] 6dd8f044371efd2655794209bb0ed5bc824fee09c8bfb0acf1efea0a7bcdee84