[INFO] fetching crate fcplug-build 0.4.5...
[INFO] testing fcplug-build-0.4.5 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate fcplug-build 0.4.5 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate fcplug-build 0.4.5
[INFO] finished tweaking crates.io crate fcplug-build 0.4.5
[INFO] tweaked toml for crates.io crate fcplug-build 0.4.5 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate fcplug-build 0.4.5 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 188 packages to latest compatible versions
[INFO] [stderr]       Adding bindgen v0.66.1 (available: v0.72.1)
[INFO] [stderr]       Adding cbindgen v0.24.5 (available: v0.29.0)
[INFO] [stderr]       Adding md5 v0.7.0 (available: v0.8.0)
[INFO] [stderr]       Adding strum v0.25.0 (available: v0.27.2)
[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-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 575dea9d16f5c42174222b4979e7f5d6e8d9d12f1424f297f5779f7d36f3e9f1
[INFO] running `Command { std: "docker" "start" "-a" "575dea9d16f5c42174222b4979e7f5d6e8d9d12f1424f297f5779f7d36f3e9f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "575dea9d16f5c42174222b4979e7f5d6e8d9d12f1424f297f5779f7d36f3e9f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "575dea9d16f5c42174222b4979e7f5d6e8d9d12f1424f297f5779f7d36f3e9f1", kill_on_drop: false }`
[INFO] [stdout] 575dea9d16f5c42174222b4979e7f5d6e8d9d12f1424f297f5779f7d36f3e9f1
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4dcc49e09596458c81b4de28dd94b1e67a49f084d73ac03e077d2f5d84c1c6d6
[INFO] running `Command { std: "docker" "start" "-a" "4dcc49e09596458c81b4de28dd94b1e67a49f084d73ac03e077d2f5d84c1c6d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling bitflags v2.9.4
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling rustix v1.1.2
[INFO] [stderr]    Compiling rustix v0.38.44
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling linux-raw-sys v0.4.15
[INFO] [stderr]    Compiling linux-raw-sys v0.11.0
[INFO] [stderr]    Compiling siphasher v1.0.1
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling tracing-core v0.1.34
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rayon-core v1.13.0
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling phf_shared v0.11.3
[INFO] [stderr]    Compiling protobuf v3.7.2
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling protobuf2 v4.0.0-alpha.2
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling object v0.37.3
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling phf_generator v0.11.3
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling libloading v0.8.9
[INFO] [stderr]    Compiling thread_local v1.1.9
[INFO] [stderr]    Compiling textwrap v0.16.2
[INFO] [stderr]    Compiling gimli v0.32.3
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling clang-sys v1.8.1
[INFO] [stderr]    Compiling cbindgen v0.24.5
[INFO] [stderr]    Compiling oorandom v11.1.5
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[INFO] [stderr]    Compiling simdutf8 v0.1.5
[INFO] [stderr]    Compiling regex-automata v0.4.11
[INFO] [stderr]    Compiling nu-ansi-term v0.50.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling bytes v1.10.1
[INFO] [stderr]    Compiling bindgen v0.66.1
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling petgraph v0.6.5
[INFO] [stderr]    Compiling clap v3.2.25
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling dashmap v5.5.3
[INFO] [stderr]    Compiling tempfile v3.23.0
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]    Compiling pilota-thrift-parser v0.4.2
[INFO] [stderr]    Compiling which v4.4.2
[INFO] [stderr]    Compiling faststr v0.2.32
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling scoped-tls v1.0.1
[INFO] [stderr]    Compiling normpath v1.5.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.26
[INFO] [stderr]    Compiling flatc-rust v0.2.0
[INFO] [stderr]    Compiling defer-lite v1.0.0
[INFO] [stderr]    Compiling addr2line v0.25.1
[INFO] [stderr]    Compiling regex v1.11.3
[INFO] [stderr]    Compiling matchers v0.2.0
[INFO] [stderr]    Compiling salsa-macros v0.17.0-pre.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling phf_macros v0.11.3
[INFO] [stderr]    Compiling strum_macros v0.25.3
[INFO] [stderr]    Compiling phf v0.11.3
[INFO] [stderr]    Compiling salsa v0.17.0-pre.2
[INFO] [stderr]    Compiling strum v0.25.0
[INFO] [stderr]    Compiling backtrace v0.3.76
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling protobuf-support2 v4.0.0-alpha.2
[INFO] [stderr]    Compiling protobuf-support v3.7.2
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling tracing-subscriber v0.3.20
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling toml_datetime v0.6.11
[INFO] [stderr]    Compiling serde_spanned v0.6.9
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]    Compiling serde_yaml v0.9.34+deprecated
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling protobuf-parse v3.7.2
[INFO] [stderr]    Compiling protobuf-parse2 v4.0.0-alpha.4
[INFO] [stderr]    Compiling toml v0.7.8
[INFO] [stderr]    Compiling protobuf-codegen v3.7.2
[INFO] [stderr]    Compiling pilota-build2 v0.7.13
[INFO] [stderr]    Compiling fcplug-build v0.4.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait_v2)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fcplug-build` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "4dcc49e09596458c81b4de28dd94b1e67a49f084d73ac03e077d2f5d84c1c6d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dcc49e09596458c81b4de28dd94b1e67a49f084d73ac03e077d2f5d84c1c6d6", kill_on_drop: false }`
[INFO] [stdout] 4dcc49e09596458c81b4de28dd94b1e67a49f084d73ac03e077d2f5d84c1c6d6