[INFO] fetching crate value-box 2.3.3...
[INFO] testing value-box-2.3.3 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate value-box 2.3.3 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate value-box 2.3.3
[INFO] finished tweaking crates.io crate value-box 2.3.3
[INFO] tweaked toml for crates.io crate value-box 2.3.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate value-box 2.3.3 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 23 packages to latest compatible versions
[INFO] [stderr]       Adding phlow v1.7.1 (available: v2.0.1)
[INFO] [stderr]       Adding phlow-extensions v1.6.0 (available: v2.0.0)
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.17)
[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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] d892519fb6da638cb3f7ec54c96289f0d8a257cf8775ccc1fec53f78dfbdfb78
[INFO] running `Command { std: "docker" "start" "-a" "d892519fb6da638cb3f7ec54c96289f0d8a257cf8775ccc1fec53f78dfbdfb78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d892519fb6da638cb3f7ec54c96289f0d8a257cf8775ccc1fec53f78dfbdfb78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d892519fb6da638cb3f7ec54c96289f0d8a257cf8775ccc1fec53f78dfbdfb78", kill_on_drop: false }`
[INFO] [stdout] d892519fb6da638cb3f7ec54c96289f0d8a257cf8775ccc1fec53f78dfbdfb78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 4fd660f8f677ffd88209553350f5df8fee3f66c484b89cbe8e2c9cfce34f750e
[INFO] running `Command { std: "docker" "start" "-a" "4fd660f8f677ffd88209553350f5df8fee3f66c484b89cbe8e2c9cfce34f750e", kill_on_drop: false }`
[INFO] [stderr]    Compiling user-error v1.2.8
[INFO] [stderr]    Compiling value-box v2.3.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "4fd660f8f677ffd88209553350f5df8fee3f66c484b89cbe8e2c9cfce34f750e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fd660f8f677ffd88209553350f5df8fee3f66c484b89cbe8e2c9cfce34f750e", kill_on_drop: false }`
[INFO] [stdout] 4fd660f8f677ffd88209553350f5df8fee3f66c484b89cbe8e2c9cfce34f750e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5fb01a1edc0a5d4937b7855ac945f9d56981baffb4c2de353e224fd8ca9955b
[INFO] running `Command { std: "docker" "start" "-a" "e5fb01a1edc0a5d4937b7855ac945f9d56981baffb4c2de353e224fd8ca9955b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-format v0.3.4
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling phlow-derive v1.4.0
[INFO] [stderr]    Compiling phlow v1.7.1
[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/phlow-1.7.1/src/lib.rs:4:35
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![cfg_attr(feature = "printing", feature(specialization))]
[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 `phlow` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e5fb01a1edc0a5d4937b7855ac945f9d56981baffb4c2de353e224fd8ca9955b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5fb01a1edc0a5d4937b7855ac945f9d56981baffb4c2de353e224fd8ca9955b", kill_on_drop: false }`
[INFO] [stdout] e5fb01a1edc0a5d4937b7855ac945f9d56981baffb4c2de353e224fd8ca9955b