[INFO] fetching crate espflash 4.4.0...
[INFO] testing espflash-4.4.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate espflash 4.4.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate espflash 4.4.0
[INFO] finished tweaking crates.io crate espflash 4.4.0
[INFO] tweaked toml for crates.io crate espflash 4.4.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate espflash 4.4.0 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 espflash 4.4.0 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] [stderr] warning: version requirement `1.1.2+spec-1.1.0` for dependency `toml` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[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] 52d92f2f8a95771139debd5f98423bcae62f9b42dfc6cb51ba76d03025e8131d
[INFO] running `Command { std: "docker" "start" "-a" "52d92f2f8a95771139debd5f98423bcae62f9b42dfc6cb51ba76d03025e8131d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52d92f2f8a95771139debd5f98423bcae62f9b42dfc6cb51ba76d03025e8131d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52d92f2f8a95771139debd5f98423bcae62f9b42dfc6cb51ba76d03025e8131d", kill_on_drop: false }`
[INFO] [stdout] 52d92f2f8a95771139debd5f98423bcae62f9b42dfc6cb51ba76d03025e8131d
[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] 987655c3e62073254283467261235409c6a298a6c324eb631c5c36733a694acd
[INFO] running `Command { std: "docker" "start" "-a" "987655c3e62073254283467261235409c6a298a6c324eb631c5c36733a694acd", kill_on_drop: false }`
[INFO] [stderr] warning: version requirement `1.1.2+spec-1.1.0` for dependency `toml` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling libc v0.2.185
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]    Compiling hashbrown v0.17.0
[INFO] [stderr]    Compiling linux-raw-sys v0.12.1
[INFO] [stderr]    Compiling cc v1.2.60
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling twox-hash v2.1.2
[INFO] [stderr]    Compiling object v0.37.3
[INFO] [stderr]    Compiling unicode-width v0.2.2
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling cpp_demangle v0.4.5
[INFO] [stderr]    Compiling anstyle-parse v1.0.0
[INFO] [stderr]    Compiling httparse v1.10.1
[INFO] [stderr]    Compiling signal-hook v0.3.18
[INFO] [stderr]    Compiling ruzstd v0.8.2
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling unicode-segmentation v1.13.2
[INFO] [stderr]    Compiling fallible-iterator v0.3.0
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.2
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling colorchoice v1.0.5
[INFO] [stderr]    Compiling anstyle-query v1.1.5
[INFO] [stderr]    Compiling rustls v0.23.38
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling anstream v1.0.0
[INFO] [stderr]    Compiling bytes v1.11.1
[INFO] [stderr]    Compiling typed-arena v2.0.2
[INFO] [stderr]    Compiling peg-runtime v0.8.5
[INFO] [stderr]    Compiling convert_case v0.10.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.27
[INFO] [stderr]    Compiling data-encoding v2.10.0
[INFO] [stderr]    Compiling peg-macros v0.8.5
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling indexmap v2.14.0
[INFO] [stderr]    Compiling lock_api v0.4.14
[INFO] [stderr]    Compiling nix v0.31.2
[INFO] [stderr]    Compiling http v1.4.0
[INFO] [stderr]    Compiling owo-colors v4.3.0
[INFO] [stderr]    Compiling object v0.36.7
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling litrs v1.0.0
[INFO] [stderr]    Compiling time-core v0.1.8
[INFO] [stderr]    Compiling iana-time-zone v0.1.65
[INFO] [stderr]    Compiling chrono v0.4.44
[INFO] [stderr]    Compiling time-macros v0.2.27
[INFO] [stderr]    Compiling bitvec v1.0.1
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling document-features v0.2.12
[INFO] [stderr]    Compiling toml_edit v0.25.11+spec-1.1.0
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling gimli v0.32.3
[INFO] [stderr]    Compiling peg v0.8.5
[INFO] [stderr]    Compiling csv-core v0.1.13
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling errno v0.3.14
[INFO] [stderr]    Compiling memmap2 v0.9.10
[INFO] [stderr]    Compiling signal-hook-registry v1.4.8
[INFO] [stderr]    Compiling proc-macro-crate v3.5.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling console v0.16.3
[INFO] [stderr]    Compiling no_std_io2 v0.8.1
[INFO] [stderr]    Compiling webpki-roots v1.0.7
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling arc-swap v1.9.1
[INFO] [stderr]    Compiling nix v0.30.1
[INFO] [stderr]    Compiling option-ext v0.2.0
[INFO] [stderr]    Compiling winnow v1.0.1
[INFO] [stderr]    Compiling bitflags v2.11.1
[INFO] [stderr]    Compiling log v0.4.29
[INFO] [stderr]    Compiling hexfloat2 v0.1.3
[INFO] [stderr]    Compiling home v0.5.12
[INFO] [stderr]    Compiling fastrand v2.4.1
[INFO] [stderr]    Compiling const-oid v0.10.2
[INFO] [stderr]    Compiling mio v1.2.0
[INFO] [stderr]    Compiling ureq-proto v0.6.0
[INFO] [stderr]    Compiling unicode-linebreak v0.1.5
[INFO] [stderr]    Compiling is_ci v1.2.0
[INFO] [stderr]    Compiling utf8-zero v0.8.1
[INFO] [stderr]    Compiling object v0.39.0
[INFO] [stderr]    Compiling nix v0.26.4
[INFO] [stderr]    Compiling darling_core v0.20.11
[INFO] [stderr]    Compiling textwrap v0.16.2
[INFO] [stderr]    Compiling digest v0.11.2
[INFO] [stderr]    Compiling signal-hook-mio v0.2.5
[INFO] [stderr]    Compiling supports-color v3.0.2
[INFO] [stderr]    Compiling colored v2.2.0
[INFO] [stderr]    Compiling toml_parser v1.1.2+spec-1.1.0
[INFO] [stderr]    Compiling alterable_logger v1.0.1
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling etcetera v0.10.0
[INFO] [stderr]    Compiling time v0.3.47
[INFO] [stderr]    Compiling csv v1.4.0
[INFO] [stderr]    Compiling serde_spanned v1.1.1
[INFO] [stderr]    Compiling toml_datetime v1.1.1+spec-1.1.0
[INFO] [stderr]    Compiling dirs-sys v0.5.0
[INFO] [stderr]    Compiling regex v1.12.3
[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="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --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=6330fe8577d04736 -C extra-filename=-21a9f4525925b5bd --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-0fa97b1aa44f5fda.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-544fd508281ca8af.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" "987655c3e62073254283467261235409c6a298a6c324eb631c5c36733a694acd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "987655c3e62073254283467261235409c6a298a6c324eb631c5c36733a694acd", kill_on_drop: false }`
[INFO] [stdout] 987655c3e62073254283467261235409c6a298a6c324eb631c5c36733a694acd
