[INFO] fetching crate safety-lib 0.3.8...
[INFO] testing safety-lib-0.3.8 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate safety-lib 0.3.8 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate safety-lib 0.3.8
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate safety-lib 0.3.8
[INFO] tweaked toml for crates.io crate safety-lib 0.3.8 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate safety-lib 0.3.8 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 safety-lib 0.3.8 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 818c06051b544058eab3bc175d5e44ce99d6d40b1736df5181b87c854b81643c
[INFO] running `Command { std: "docker" "start" "-a" "818c06051b544058eab3bc175d5e44ce99d6d40b1736df5181b87c854b81643c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "818c06051b544058eab3bc175d5e44ce99d6d40b1736df5181b87c854b81643c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "818c06051b544058eab3bc175d5e44ce99d6d40b1736df5181b87c854b81643c", kill_on_drop: false }`
[INFO] [stdout] 818c06051b544058eab3bc175d5e44ce99d6d40b1736df5181b87c854b81643c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 1190fcc01a7aabba262d32cf488be24b8d5192923a6031f04e6681bcc1d1da60
[INFO] running `Command { std: "docker" "start" "-a" "1190fcc01a7aabba262d32cf488be24b8d5192923a6031f04e6681bcc1d1da60", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling itoa v1.0.15
[INFO] [stderr]    Compiling ryu v1.0.20
[INFO] [stderr]    Compiling winnow v0.7.11
[INFO] [stderr]    Compiling toml_writer v1.0.2
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling toml_parser v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling toml_datetime v0.7.0
[INFO] [stderr]    Compiling serde_spanned v1.0.0
[INFO] [stderr]    Compiling indexmap v2.10.0
[INFO] [stderr]    Compiling toml v0.9.2
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling safety-parser v0.3.8
[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/safety-parser-0.3.8/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(let_chains)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `let_chains` has been stable since `1.88.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `safety-parser` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "1190fcc01a7aabba262d32cf488be24b8d5192923a6031f04e6681bcc1d1da60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1190fcc01a7aabba262d32cf488be24b8d5192923a6031f04e6681bcc1d1da60", kill_on_drop: false }`
[INFO] [stdout] 1190fcc01a7aabba262d32cf488be24b8d5192923a6031f04e6681bcc1d1da60