[INFO] fetching crate rust-mcp-server-syncable-cli 0.1.13...
[INFO] testing rust-mcp-server-syncable-cli-0.1.13 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate rust-mcp-server-syncable-cli 0.1.13 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate rust-mcp-server-syncable-cli 0.1.13
[INFO] finished tweaking crates.io crate rust-mcp-server-syncable-cli 0.1.13
[INFO] tweaked toml for crates.io crate rust-mcp-server-syncable-cli 0.1.13 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust-mcp-server-syncable-cli 0.1.13 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rust-mcp-server-syncable-cli 0.1.13 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-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9cce922aec8f896111a4c4b804551b9aa70ec057bec753f22b0407f6e3802332
[INFO] running `Command { std: "docker" "start" "-a" "9cce922aec8f896111a4c4b804551b9aa70ec057bec753f22b0407f6e3802332", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cce922aec8f896111a4c4b804551b9aa70ec057bec753f22b0407f6e3802332", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cce922aec8f896111a4c4b804551b9aa70ec057bec753f22b0407f6e3802332", kill_on_drop: false }`
[INFO] [stdout] 9cce922aec8f896111a4c4b804551b9aa70ec057bec753f22b0407f6e3802332
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa282b49666cc4a61c2df701a4aab151029d155af04f0fe2d1986ac17b23c7da
[INFO] running `Command { std: "docker" "start" "-a" "aa282b49666cc4a61c2df701a4aab151029d155af04f0fe2d1986ac17b23c7da", kill_on_drop: false }`
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling serde_core v1.0.225
[INFO] [stderr]    Compiling serde v1.0.225
[INFO] [stderr]    Compiling zlib-rs v0.5.2
[INFO] [stderr]    Compiling regex-automata v0.4.10
[INFO] [stderr]    Compiling gix-trace v0.1.13
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling unicode-normalization v0.1.24
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling winnow v0.7.13
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling mio v1.0.4
[INFO] [stderr]    Compiling jiff v0.2.15
[INFO] [stderr]    Compiling hash32 v0.3.1
[INFO] [stderr]    Compiling cc v1.2.38
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]    Compiling percent-encoding v2.3.2
[INFO] [stderr]    Compiling rustix v1.1.2
[INFO] [stderr]    Compiling memmap2 v0.9.8
[INFO] [stderr]    Compiling sha1 v0.10.6
[INFO] [stderr]    Compiling parking_lot v0.12.4
[INFO] [stderr]    Compiling gix-utils v0.3.0
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling sha1-checked v0.10.0
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling form_urlencoded v1.2.2
[INFO] [stderr]    Compiling aws-lc-rs v1.14.0
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling prodash v29.0.2
[INFO] [stderr]    Compiling rustls v0.23.32
[INFO] [stderr]    Compiling time-core v0.1.6
[INFO] [stderr]    Compiling cookie v0.18.1
[INFO] [stderr]    Compiling unicode-bom v2.0.3
[INFO] [stderr]    Compiling cmake v0.1.54
[INFO] [stderr]    Compiling mime_guess v2.0.5
[INFO] [stderr]    Compiling psl-types v2.0.11
[INFO] [stderr]    Compiling time-macros v0.2.24
[INFO] [stderr]    Compiling compression-core v0.4.29
[INFO] [stderr]    Compiling litrs v0.4.2
[INFO] [stderr]    Compiling shell-words v1.1.0
[INFO] [stderr]    Compiling kstring v2.0.2
[INFO] [stderr]    Compiling webpki-roots v1.0.2
[INFO] [stderr]    Compiling gix-sec v0.11.0
[INFO] [stderr]    Compiling phf_shared v0.11.3
[INFO] [stderr]    Compiling regex-syntax v0.8.6
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling filetime v0.2.26
[INFO] [stderr]    Compiling uluru v3.1.0
[INFO] [stderr]    Compiling document-features v0.2.11
[INFO] [stderr]    Compiling phf v0.11.3
[INFO] [stderr]    Compiling fs-err v3.1.2
[INFO] [stderr]    Compiling ucd-trie v0.1.7
[INFO] [stderr]    Compiling clru v0.6.2
[INFO] [stderr]    Compiling io-close v0.3.7
[INFO] [stderr]    Compiling unic-common v0.9.0
[INFO] [stderr]    Compiling camino v1.2.0
[INFO] [stderr]    Compiling unic-char-range v0.9.0
[INFO] [stderr]    Compiling phf_generator v0.11.3
[INFO] [stderr]    Compiling unic-ucd-version v0.9.0
[INFO] [stderr]    Compiling phf_codegen v0.11.3
[INFO] [stderr]    Compiling unic-char-property v0.9.0
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling unic-ucd-segment v0.9.0
[INFO] [stderr]    Compiling aws-lc-sys v0.31.0
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling openssl-sys v0.9.109
[INFO] [stderr]    Compiling tempfile v3.22.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling semver v1.0.27
[INFO] [stderr]    Compiling blake3 v1.8.2
[INFO] [stderr]    Compiling toml-span v0.5.2
[INFO] [stderr]    Compiling openssl v0.10.73
[INFO] [stderr]    Compiling native-tls v0.2.14
[INFO] [stderr]    Compiling deunicode v1.6.2
[INFO] [stderr]    Compiling rustc-stable-hash v0.1.2
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling twox-hash v2.1.2
[INFO] [stderr]    Compiling bstr v1.12.0
[INFO] [stderr]    Compiling regex v1.11.2
[INFO] [stderr]    Compiling libz-rs-sys v0.5.2
[INFO] [stderr]    Compiling flate2 v1.1.2
[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-2025-09-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.106/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=76f977ec97765af5 -C extra-filename=-ad15d33abd6af0a0 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-3961f8809e272ccb.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-8b6071bff2f2593c.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-9ad4622e9362cad2.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" "aa282b49666cc4a61c2df701a4aab151029d155af04f0fe2d1986ac17b23c7da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa282b49666cc4a61c2df701a4aab151029d155af04f0fe2d1986ac17b23c7da", kill_on_drop: false }`
[INFO] [stdout] aa282b49666cc4a61c2df701a4aab151029d155af04f0fe2d1986ac17b23c7da
