[INFO] cloning repository https://github.com/ttrrii/kitties
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ttrrii/kitties" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fttrrii%2Fkitties", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fttrrii%2Fkitties'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9ee0d037dac55e48a7a577f9ba475d16dae3c11d
[INFO] documenting ttrrii/kitties against beta-2026-04-21 for beta-1.96-rustdoc-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fttrrii%2Fkitties" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ttrrii/kitties
[INFO] finished tweaking git repo https://github.com/ttrrii/kitties
[INFO] tweaked toml for git repo https://github.com/ttrrii/kitties written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ttrrii/kitties 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/paritytech/substrate.git`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 803 packages to latest compatible versions
[INFO] [stderr]       Adding chacha20 v0.7.1 (available: v0.7.3)
[INFO] [stderr]       Adding chacha20poly1305 v0.8.0 (available: v0.8.2)
[INFO] [stderr]       Adding clap v3.2.25 (available: v4.6.1)
[INFO] [stderr]       Adding curve25519-dalek v3.2.0 (available: v3.2.1)
[INFO] [stderr]       Adding generic-array v0.14.7 (available: v0.14.9)
[INFO] [stderr]       Adding hex-literal v0.3.4 (available: v1.1.0)
[INFO] [stderr]       Adding parity-scale-codec v2.3.1 (available: v3.7.5)
[INFO] [stderr]       Adding scale-info v1.0.0 (available: v2.11.6)
[INFO] [stderr]       Adding subtle v2.4.1 (available: v2.6.1)
[INFO] [stderr]       Adding x25519-dalek v1.1.1 (available: v1.2.0)
[INFO] [stderr]       Adding zstd-safe v4.1.3+zstd.1.5.1 (available: v4.1.6+zstd.1.5.2)
[INFO] [stderr]       Adding zstd-sys v1.6.2+zstd.1.5.1 (available: v1.6.3+zstd.1.5.2)
[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] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 12dadbb69b66f02b037928bbd3ffcb6e0afcf28d5df2b979ad422832730094e8
[INFO] running `Command { std: "docker" "start" "-a" "12dadbb69b66f02b037928bbd3ffcb6e0afcf28d5df2b979ad422832730094e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12dadbb69b66f02b037928bbd3ffcb6e0afcf28d5df2b979ad422832730094e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12dadbb69b66f02b037928bbd3ffcb6e0afcf28d5df2b979ad422832730094e8", kill_on_drop: false }`
[INFO] [stdout] 12dadbb69b66f02b037928bbd3ffcb6e0afcf28d5df2b979ad422832730094e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] cc4dcf88903cce383221fdf5cc0425abe54ca7c76d5ec1cd21ab0ca0f15b732c
[INFO] running `Command { std: "docker" "start" "-a" "cc4dcf88903cce383221fdf5cc0425abe54ca7c76d5ec1cd21ab0ca0f15b732c", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling version_check v0.9.5
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking typenum v1.20.0
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling once_cell v1.21.4
[INFO] [stderr]    Compiling hashbrown v0.17.0
[INFO] [stderr]    Compiling equivalent v1.0.2
[INFO] [stderr]     Checking value-bag v1.12.0
[INFO] [stderr]     Checking futures-core v0.3.32
[INFO] [stderr]    Compiling zerocopy v0.8.48
[INFO] [stderr]     Checking futures-io v0.3.32
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]     Checking futures-task v0.3.32
[INFO] [stderr]     Checking futures-channel v0.3.32
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]    Compiling anyhow v1.0.102
[INFO] [stderr]     Checking log v0.4.29
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]     Checking stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling toml_datetime v0.6.11
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]     Checking cpufeatures v0.2.17
[INFO] [stderr]    Compiling indexmap v2.14.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]     Checking instant v0.1.13
[INFO] [stderr]     Checking opaque-debug v0.3.1
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling cfg-if v1.0.4
[INFO] [stderr]     Checking block-padding v0.2.1
[INFO] [stderr]    Compiling unicode-xid v0.2.6
[INFO] [stderr]    Compiling ahash v0.7.8
[INFO] [stderr]     Checking arrayref v0.3.9
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]     Checking either v1.15.0
[INFO] [stderr]     Checking signature v1.6.4
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]     Checking ed25519 v1.5.3
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]     Checking base64 v0.22.1
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking libsecp256k1-core v0.3.0
[INFO] [stderr]    Compiling libm v0.2.16
[INFO] [stderr]     Checking hmac v0.8.1
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking hmac-drbg v0.3.0
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]     Checking arrayvec v0.7.6
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking byte-slice-cast v1.2.3
[INFO] [stderr]    Compiling crc32fast v1.5.0
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking getrandom v0.2.17
[INFO] [stderr]     Checking bitvec v0.20.4
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling cc v1.2.61
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking simd-adler32 v0.3.9
[INFO] [stderr]     Checking tinyvec_macros v0.1.1
[INFO] [stderr]     Checking base64 v0.13.1
[INFO] [stderr]     Checking adler2 v2.0.1
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]     Checking miniz_oxide v0.8.9
[INFO] [stderr]    Compiling libsecp256k1-gen-genmult v0.3.0
[INFO] [stderr]    Compiling libsecp256k1-gen-ecmult v0.3.0
[INFO] [stderr]     Checking tinyvec v1.11.0
[INFO] [stderr]    Compiling zstd-safe v4.1.3+zstd.1.5.1
[INFO] [stderr]    Compiling libsecp256k1 v0.7.2
[INFO] [stderr]    Compiling object v0.37.3
[INFO] [stderr]     Checking uint v0.9.5
[INFO] [stderr]     Checking crypto-common v0.1.7
[INFO] [stderr]    Compiling target-lexicon v0.12.16
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking keccak v0.1.6
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]     Checking unicode-normalization v0.1.25
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.80.1
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.80.1
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]    Compiling zstd-sys v1.6.2+zstd.1.5.1
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]    Compiling semver v1.0.28
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling io-lifetimes v0.4.4
[INFO] [stderr]     Checking wasmparser v0.81.0
[INFO] [stderr]     Checking regalloc v0.0.33
[INFO] [stderr]    Compiling zmij v1.0.21
[INFO] [stderr]    Compiling itoa v1.0.18
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling rustix v0.31.3
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking gimli v0.32.3
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking rand v0.8.6
[INFO] [stderr]    Compiling parity-util-mem v0.10.2
[INFO] [stderr]     Checking more-asserts v0.2.2
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking sp-std v4.0.0 (https://github.com/paritytech/substrate.git?branch=polkadot-v0.9.17#22d40c76)
[INFO] [stderr]     Checking rustc-demangle v0.1.27
[INFO] [stderr]     Checking regex v1.12.3
[INFO] [stderr]     Checking linux-raw-sys v0.0.36
[INFO] [stderr]     Checking fixed-hash v0.7.0
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]    Compiling wasmtime-runtime v0.33.1
[INFO] [stderr]     Checking is-terminal v0.4.17
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling rayon-core v1.13.0
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking humantime v2.3.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]     Checking region v2.2.0
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking env_logger v0.10.2
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking parity-wasm v0.42.2
[INFO] [stderr]     Checking iana-time-zone v0.1.65
[INFO] [stderr]    Compiling ref-cast v1.0.25
[INFO] [stderr]    Compiling wasmtime-cache v0.33.1
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling cpp_demangle v0.3.5
[INFO] [stderr]     Checking file-per-thread-logger v0.1.6
[INFO] [stderr]     Checking chrono v0.4.44
[INFO] [stderr]    Compiling curve25519-dalek v4.1.3
[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-2.0.117/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=1fe0557ca30a4718 -C extra-filename=-41ce07e45bd577d3 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-47859ff3f54a1fbd.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-7ef5d6d5c0d9e8ab.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-423507c85e36a25a.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" "cc4dcf88903cce383221fdf5cc0425abe54ca7c76d5ec1cd21ab0ca0f15b732c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc4dcf88903cce383221fdf5cc0425abe54ca7c76d5ec1cd21ab0ca0f15b732c", kill_on_drop: false }`
[INFO] [stdout] cc4dcf88903cce383221fdf5cc0425abe54ca7c76d5ec1cd21ab0ca0f15b732c
