[INFO] fetching crate helyim 0.1.0...
[INFO] testing helyim-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate helyim 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate helyim 0.1.0
[INFO] finished tweaking crates.io crate helyim 0.1.0
[INFO] tweaked toml for crates.io crate helyim 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate helyim 0.1.0 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 helyim 0.1.0 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-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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 3a3323758ea446d683d96b96f91a2eefe00e23d47d8c2706aa91e9461ecdffbb
[INFO] running `Command { std: "docker" "start" "-a" "3a3323758ea446d683d96b96f91a2eefe00e23d47d8c2706aa91e9461ecdffbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a3323758ea446d683d96b96f91a2eefe00e23d47d8c2706aa91e9461ecdffbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a3323758ea446d683d96b96f91a2eefe00e23d47d8c2706aa91e9461ecdffbb", kill_on_drop: false }`
[INFO] [stdout] 3a3323758ea446d683d96b96f91a2eefe00e23d47d8c2706aa91e9461ecdffbb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 13b66c7547f4d90d85523bd83ba9c4f50a6e624e04d1e593bce62e0abf656946
[INFO] running `Command { std: "docker" "start" "-a" "13b66c7547f4d90d85523bd83ba9c4f50a6e624e04d1e593bce62e0abf656946", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.81
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[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling chrono v0.4.38
[INFO] [stderr]    Compiling trust-dns-resolver v0.23.2
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[INFO] [stderr]    Compiling validit v0.2.4
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[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling event-listener-strategy v0.5.1
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling openraft-macros v0.9.5
[INFO] [stderr]    Compiling rustls-pemfile v1.0.4
[INFO] [stderr]    Compiling lru v0.7.8
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling uuid v1.8.0
[INFO] [stderr]    Compiling simdutf8 v0.1.4
[INFO] [stderr]    Compiling tagptr v0.2.0
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling atomic v0.5.3
[INFO] [stderr]    Compiling triomphe v0.1.11
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling dary_heap v0.3.6
[INFO] [stderr]    Compiling leapfrog v0.3.0
[INFO] [stderr]    Compiling libflate v2.0.0
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/leapfrog-0.3.0/src/lib.rs:153:44
[INFO] [stdout]     |
[INFO] [stdout] 153 | #![cfg_attr(not(feature = "stable_alloc"), feature(allocator_api))]
[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 `leapfrog` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "13b66c7547f4d90d85523bd83ba9c4f50a6e624e04d1e593bce62e0abf656946", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13b66c7547f4d90d85523bd83ba9c4f50a6e624e04d1e593bce62e0abf656946", kill_on_drop: false }`
[INFO] [stdout] 13b66c7547f4d90d85523bd83ba9c4f50a6e624e04d1e593bce62e0abf656946