[INFO] fetching crate jwkserve 0.20.0...
[INFO] testing jwkserve-0.20.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate jwkserve 0.20.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate jwkserve 0.20.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate jwkserve 0.20.0
[INFO] tweaked toml for crates.io crate jwkserve 0.20.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate jwkserve 0.20.0 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 jwkserve 0.20.0 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 4a37c4ab598c218f63b54443ea8bd4910c9984d60c95dbd445f3f333f59a9702
[INFO] running `Command { std: "docker" "start" "-a" "4a37c4ab598c218f63b54443ea8bd4910c9984d60c95dbd445f3f333f59a9702", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a37c4ab598c218f63b54443ea8bd4910c9984d60c95dbd445f3f333f59a9702", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a37c4ab598c218f63b54443ea8bd4910c9984d60c95dbd445f3f333f59a9702", kill_on_drop: false }`
[INFO] [stdout] 4a37c4ab598c218f63b54443ea8bd4910c9984d60c95dbd445f3f333f59a9702
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 4952591d31ac030891c00b0317edc325c553f2ddfe8e06d541530816da581499
[INFO] running `Command { std: "docker" "start" "-a" "4952591d31ac030891c00b0317edc325c553f2ddfe8e06d541530816da581499", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling typenum v1.19.0
[INFO] [stderr]    Compiling subtle v2.6.1
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling base64ct v1.8.0
[INFO] [stderr]    Compiling find-msvc-tools v0.1.5
[INFO] [stderr]    Compiling const-oid v0.10.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling rand_core v0.10.0-rc-2
[INFO] [stderr]    Compiling tracing-core v0.1.35
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling http v1.4.0
[INFO] [stderr]    Compiling const-oid v0.9.6
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling rustcrypto-ff v0.14.0-pre.0
[INFO] [stderr]    Compiling base16ct v0.3.0
[INFO] [stderr]    Compiling zerocopy v0.8.30
[INFO] [stderr]    Compiling icu_properties_data v2.1.1
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling rustcrypto-group v0.14.0-pre.0
[INFO] [stderr]    Compiling rustls-pki-types v1.13.1
[INFO] [stderr]    Compiling pem-rfc7468 v1.0.0
[INFO] [stderr]    Compiling pem-rfc7468 v0.7.0
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling der v0.8.0-rc.10
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling rustls v0.23.35
[INFO] [stderr]    Compiling httpdate v1.0.3
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling der v0.7.10
[INFO] [stderr]    Compiling utf8parse v0.2.2
[INFO] [stderr]    Compiling powerfmt v0.2.0
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]    Compiling time-core v0.1.6
[INFO] [stderr]    Compiling deranged v0.5.5
[INFO] [stderr]    Compiling anstyle-parse v0.2.7
[INFO] [stderr]    Compiling syn v2.0.111
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling time-macros v0.2.24
[INFO] [stderr]    Compiling aws-lc-rs v1.15.2
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling mio v1.1.0
[INFO] [stderr]    Compiling cc v1.2.48
[INFO] [stderr]    Compiling signal-hook-registry v1.4.7
[INFO] [stderr]    Compiling hybrid-array v0.4.5
[INFO] [stderr]    Compiling socket2 v0.6.1
[INFO] [stderr]    Compiling spki v0.8.0-rc.4
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling pkcs8 v0.11.0-rc.8
[INFO] [stderr]    Compiling block-buffer v0.11.0
[INFO] [stderr]    Compiling crypto-common v0.2.0-rc.5
[INFO] [stderr]    Compiling crypto-bigint v0.7.0-rc.10
[INFO] [stderr]    Compiling sec1 v0.8.0-rc.10
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling crypto-common v0.1.7
[INFO] [stderr]    Compiling spki v0.7.3
[INFO] [stderr]    Compiling http-body-util v0.1.3
[INFO] [stderr]    Compiling anstyle-query v1.1.5
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling regex-syntax v0.8.8
[INFO] [stderr]    Compiling cmake v0.1.54
[INFO] [stderr]    Compiling colorchoice v1.0.4
[INFO] [stderr]    Compiling owo-colors v4.2.3
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.2
[INFO] [stderr]    Compiling eyre v0.6.12
[INFO] [stderr]    Compiling num-bigint-dig v0.8.6
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling time v0.3.44
[INFO] [stderr]    Compiling anstream v0.6.21
[INFO] [stderr]    Compiling signature v2.2.0
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling pkcs8 v0.10.2
[INFO] [stderr]    Compiling digest v0.11.0-rc.4
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling hmac v0.13.0-rc.3
[INFO] [stderr]    Compiling signature v3.0.0-rc.5
[INFO] [stderr]    Compiling sha2 v0.11.0-rc.3
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling num-iter v0.1.45
[INFO] [stderr]    Compiling rfc6979 v0.5.0-rc.3
[INFO] [stderr]    Compiling object v0.37.3
[INFO] [stderr]    Compiling webpki-roots v1.0.4
[INFO] [stderr]    Compiling indenter v0.3.4
[INFO] [stderr]    Compiling iri-string v0.7.9
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling clap_lex v0.7.6
[INFO] [stderr]    Compiling rustc-demangle v0.1.26
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling clap_builder v4.5.53
[INFO] [stderr]    Compiling regex-automata v0.4.13
[INFO] [stderr]    Compiling pkcs1 v0.7.5
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling aws-lc-sys v0.35.0
[INFO] [stderr]    Compiling serde_path_to_error v0.1.20
[INFO] [stderr]    Compiling include_dir_macros v0.7.4
[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-2.0.111/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=d63903882855da81 -C extra-filename=-fd47c49796d750fc --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" "4952591d31ac030891c00b0317edc325c553f2ddfe8e06d541530816da581499", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4952591d31ac030891c00b0317edc325c553f2ddfe8e06d541530816da581499", kill_on_drop: false }`
[INFO] [stdout] 4952591d31ac030891c00b0317edc325c553f2ddfe8e06d541530816da581499