[INFO] cloning repository https://github.com/kookyleo/qr-tester
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kookyleo/qr-tester" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkookyleo%2Fqr-tester", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkookyleo%2Fqr-tester'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7fadf04c396c2b248f94c15d41501d8633f74d62
[INFO] documenting kookyleo/qr-tester against beta-2026-04-21 for beta-1.96-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkookyleo%2Fqr-tester" "/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/kookyleo/qr-tester
[INFO] finished tweaking git repo https://github.com/kookyleo/qr-tester
[INFO] tweaked toml for git repo https://github.com/kookyleo/qr-tester written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kookyleo/qr-tester 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 git repo https://github.com/kookyleo/qr-tester 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] [stderr]     Blocking waiting for file lock on package cache
[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] e7517f5e9f51f145ae2b97bf8a3ee53a3d1b22c8660ef065bb96c5ff79dba6b8
[INFO] running `Command { std: "docker" "start" "-a" "e7517f5e9f51f145ae2b97bf8a3ee53a3d1b22c8660ef065bb96c5ff79dba6b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7517f5e9f51f145ae2b97bf8a3ee53a3d1b22c8660ef065bb96c5ff79dba6b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7517f5e9f51f145ae2b97bf8a3ee53a3d1b22c8660ef065bb96c5ff79dba6b8", kill_on_drop: false }`
[INFO] [stdout] e7517f5e9f51f145ae2b97bf8a3ee53a3d1b22c8660ef065bb96c5ff79dba6b8
[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" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] def1d265c799a21baf280e79a2fe0b3c1a194636ff7dc01c719949416b3a625e
[INFO] running `Command { std: "docker" "start" "-a" "def1d265c799a21baf280e79a2fe0b3c1a194636ff7dc01c719949416b3a625e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]    Compiling unicode-ident v1.0.22
[INFO] [stderr]     Checking cfg-if v1.0.4
[INFO] [stderr]     Checking memchr v2.7.6
[INFO] [stderr]    Compiling zerocopy v0.8.27
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]     Checking bytemuck v1.24.0
[INFO] [stderr]     Checking weezl v0.1.12
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.1
[INFO] [stderr]     Checking arrayvec v0.7.6
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]    Compiling built v0.8.0
[INFO] [stderr]    Compiling rustix v0.38.44
[INFO] [stderr]     Checking crc32fast v1.5.0
[INFO] [stderr]     Checking as-slice v0.2.1
[INFO] [stderr]    Compiling av-scenechange v0.14.1
[INFO] [stderr]     Checking flate2 v1.1.5
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]     Checking aligned v0.4.2
[INFO] [stderr]     Checking y4m v0.8.0
[INFO] [stderr]    Compiling linux-raw-sys v0.4.15
[INFO] [stderr]    Compiling bitflags v2.10.0
[INFO] [stderr]    Compiling regex-syntax v0.8.8
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling find-msvc-tools v0.1.5
[INFO] [stderr]     Checking nom v8.0.0
[INFO] [stderr]     Checking core2 v0.4.0
[INFO] [stderr]     Checking encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling pastey v0.1.1
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling cc v1.2.46
[INFO] [stderr]     Checking bitstream-io v4.9.0
[INFO] [stderr]    Compiling libloading v0.8.9
[INFO] [stderr]     Checking aho-corasick v1.1.4
[INFO] [stderr]    Compiling rav1e v0.8.1
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]     Checking qoi v0.4.1
[INFO] [stderr]     Checking maybe-rayon v0.1.1
[INFO] [stderr]     Checking itertools v0.14.0
[INFO] [stderr]    Compiling bindgen v0.69.5
[INFO] [stderr]    Compiling clang-sys v1.8.1
[INFO] [stderr]    Compiling home v0.5.12
[INFO] [stderr]    Compiling itertools v0.12.1
[INFO] [stderr]     Checking safe_arch v0.7.4
[INFO] [stderr]     Checking avif-serialize v0.8.6
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]    Compiling simd_helpers v0.1.0
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking pxfm v0.1.25
[INFO] [stderr]    Compiling csv-core v0.1.13
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling matrixmultiply v0.3.10
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling itoa v1.0.15
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling typenum v1.19.0
[INFO] [stderr]     Checking zune-core v0.5.0
[INFO] [stderr]     Checking utf8parse v0.2.2
[INFO] [stderr]    Compiling ryu v1.0.20
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]     Checking zune-jpeg v0.5.5
[INFO] [stderr]     Checking anstyle-parse v0.2.7
[INFO] [stderr]     Checking png v0.18.0
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling regex-automata v0.4.13
[INFO] [stderr]     Checking wide v0.7.33
[INFO] [stderr]    Compiling zbar-src v0.1.5
[INFO] [stderr]     Checking gif v0.14.0
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking colorchoice v1.0.4
[INFO] [stderr]     Checking anstyle v1.0.13
[INFO] [stderr]     Checking is_terminal_polyfill v1.70.2
[INFO] [stderr]    Compiling which v4.4.2
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking moxcms v0.7.9
[INFO] [stderr]     Checking anstyle-query v1.1.5
[INFO] [stderr]     Checking ttf-parser v0.25.1
[INFO] [stderr]     Checking siphasher v1.0.1
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]     Checking anstream v0.6.21
[INFO] [stderr]     Checking phf_shared v0.12.1
[INFO] [stderr]    Compiling newtype_derive v0.1.6
[INFO] [stderr]     Checking jpeg-decoder v0.3.2
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]    Compiling chrono-tz v0.10.4
[INFO] [stderr]    Compiling csv v1.4.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking iana-time-zone v0.1.64
[INFO] [stderr]    Compiling g2poly v1.2.2
[INFO] [stderr]     Checking bit-vec v0.8.0
[INFO] [stderr]     Checking ab_glyph_rasterizer v0.1.10
[INFO] [stderr]     Checking tiff v0.9.1
[INFO] [stderr]     Checking bit-set v0.8.0
[INFO] [stderr]     Checking hashbrown v0.15.5
[INFO] [stderr]     Checking chrono v0.4.42
[INFO] [stderr]     Checking png v0.17.16
[INFO] [stderr]    Compiling codepage-437 v0.1.0
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking phf v0.12.1
[INFO] [stderr]     Checking encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]     Checking encoding-index-korean v1.20141219.5
[INFO] [stderr]     Checking encoding-index-japanese v1.20141219.5
[INFO] [stderr]     Checking simba v0.8.1
[INFO] [stderr]     Checking gif v0.13.3
[INFO] [stderr]    Compiling regex v1.12.2
[INFO] [stderr]     Checking strsim v0.11.1
[INFO] [stderr]     Checking clap_lex v0.7.6
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]     Checking uriparse v0.6.4
[INFO] [stderr]     Checking clap_builder v4.5.52
[INFO] [stderr]     Checking lru v0.12.5
[INFO] [stderr]     Checking owned_ttf_parser v0.25.1
[INFO] [stderr]     Checking ab_glyph v0.2.32
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking encoding v0.2.33
[INFO] [stderr]     Checking urlencoding v2.1.3
[INFO] [stderr]     Checking unicode-segmentation v1.12.0
[INFO] [stderr]     Checking jiff v0.2.16
[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-2.0.110/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=3dd58e475b5b74c5 -C extra-filename=-e10000a8858bf35f --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` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "def1d265c799a21baf280e79a2fe0b3c1a194636ff7dc01c719949416b3a625e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "def1d265c799a21baf280e79a2fe0b3c1a194636ff7dc01c719949416b3a625e", kill_on_drop: false }`
[INFO] [stdout] def1d265c799a21baf280e79a2fe0b3c1a194636ff7dc01c719949416b3a625e