[INFO] fetching crate fuzzcheck 0.13.0...
[INFO] testing fuzzcheck-0.13.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate fuzzcheck 0.13.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate fuzzcheck 0.13.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate fuzzcheck 0.13.0
[INFO] tweaked toml for crates.io crate fuzzcheck 0.13.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate fuzzcheck 0.13.0 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] 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]     Updating crates.io index
[INFO] [stderr]      Locking 48 packages to latest compatible versions
[INFO] [stderr]       Adding ahash v0.7.8 (available: v0.8.12)
[INFO] [stderr]       Adding bit-vec v0.6.3 (available: v0.8.0)
[INFO] [stderr]       Adding fastrand v1.9.0 (available: v2.3.0)
[INFO] [stderr]       Adding md5 v0.7.0 (available: v0.8.0)
[INFO] [stderr]       Adding nu-ansi-term v0.46.0 (available: v0.50.1)
[INFO] [stderr]       Adding object v0.29.0 (available: v0.37.3)
[INFO] [stderr]       Adding regex-syntax v0.6.29 (available: v0.8.6)
[INFO] [stderr]       Adding ron v0.7.1 (available: v0.11.0)
[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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 63e6903cc0464c27a979787fdcbaf412639e3e5a7a45e022a56de13d50952937
[INFO] running `Command { std: "docker" "start" "-a" "63e6903cc0464c27a979787fdcbaf412639e3e5a7a45e022a56de13d50952937", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63e6903cc0464c27a979787fdcbaf412639e3e5a7a45e022a56de13d50952937", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63e6903cc0464c27a979787fdcbaf412639e3e5a7a45e022a56de13d50952937", kill_on_drop: false }`
[INFO] [stdout] 63e6903cc0464c27a979787fdcbaf412639e3e5a7a45e022a56de13d50952937
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] d5ce405606c7049fe137856af999c52b4e90e3b2a18d8a2d66f88f37745c9038
[INFO] running `Command { std: "docker" "start" "-a" "d5ce405606c7049fe137856af999c52b4e90e3b2a18d8a2d66f88f37745c9038", kill_on_drop: false }`
[INFO] [stderr]    Compiling libz-sys v1.1.22
[INFO] [stderr]    Compiling ahash v0.7.8
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling getopts v0.2.24
[INFO] [stderr]    Compiling fuzzcheck v0.13.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling object v0.29.0
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling md5 v0.7.0
[INFO] [stderr]    Compiling flate2 v1.1.2
[INFO] [stderr]    Compiling fuzzcheck_common v0.13.0
[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/fuzzcheck_common-0.13.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(coverage_attribute)]
[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 `fuzzcheck_common` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d5ce405606c7049fe137856af999c52b4e90e3b2a18d8a2d66f88f37745c9038", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5ce405606c7049fe137856af999c52b4e90e3b2a18d8a2d66f88f37745c9038", kill_on_drop: false }`
[INFO] [stdout] d5ce405606c7049fe137856af999c52b4e90e3b2a18d8a2d66f88f37745c9038