[INFO] fetching crate midenc-dialect-cf 0.4.1...
[INFO] testing midenc-dialect-cf-0.4.1 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate midenc-dialect-cf 0.4.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate midenc-dialect-cf 0.4.1
[INFO] finished tweaking crates.io crate midenc-dialect-cf 0.4.1
[INFO] tweaked toml for crates.io crate midenc-dialect-cf 0.4.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate midenc-dialect-cf 0.4.1 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate midenc-dialect-cf 0.4.1 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-2025-10-28" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8745ca3392c9afdb4ef8f727531cb73682494489512863b8be69d3b85704fd77
[INFO] running `Command { std: "docker" "start" "-a" "8745ca3392c9afdb4ef8f727531cb73682494489512863b8be69d3b85704fd77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8745ca3392c9afdb4ef8f727531cb73682494489512863b8be69d3b85704fd77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8745ca3392c9afdb4ef8f727531cb73682494489512863b8be69d3b85704fd77", kill_on_drop: false }`
[INFO] [stdout] 8745ca3392c9afdb4ef8f727531cb73682494489512863b8be69d3b85704fd77
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e12bedf308cf990f9e9b668d46968a131e5af8d8a621c2121641f89a6454b633
[INFO] running `Command { std: "docker" "start" "-a" "e12bedf308cf990f9e9b668d46968a131e5af8d8a621c2121641f89a6454b633", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling allocator-api2 v0.2.21
[INFO] [stderr]    Compiling lock_api v0.4.13
[INFO] [stderr]    Compiling foldhash v0.1.5
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling object v0.36.7
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling blake3 v1.8.2
[INFO] [stderr]    Compiling winter-utils v0.12.0
[INFO] [stderr]    Compiling keccak v0.1.5
[INFO] [stderr]    Compiling gimli v0.31.1
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling thiserror v2.0.12
[INFO] [stderr]    Compiling rustix v0.38.44
[INFO] [stderr]    Compiling hashbrown v0.15.4
[INFO] [stderr]    Compiling winter-math v0.12.0
[INFO] [stderr]    Compiling sha3 v0.10.8
[INFO] [stderr]    Compiling serde v1.0.219
[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/hashbrown-0.15.4/src/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     feature(
[INFO] [stdout] 16 | |         test,
[INFO] [stdout] 17 | |         core_intrinsics,
[INFO] [stdout] 18 | |         dropck_eyepatch,
[INFO] [stdout] ...  |
[INFO] [stdout] 24 | |         strict_provenance_lints
[INFO] [stdout] 25 | |     )
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling bitflags v2.9.1
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hashbrown` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e12bedf308cf990f9e9b668d46968a131e5af8d8a621c2121641f89a6454b633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e12bedf308cf990f9e9b668d46968a131e5af8d8a621c2121641f89a6454b633", kill_on_drop: false }`
[INFO] [stdout] e12bedf308cf990f9e9b668d46968a131e5af8d8a621c2121641f89a6454b633