[INFO] fetching crate generic-str 0.3.1...
[INFO] testing generic-str-0.3.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate generic-str 0.3.1 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate generic-str 0.3.1
[INFO] finished tweaking crates.io crate generic-str 0.3.1
[INFO] tweaked toml for crates.io crate generic-str 0.3.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate generic-str 0.3.1 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 1 package to latest compatible version
[INFO] [stderr]       Adding cl-generic-vec v0.3.4 (available: v0.4.0)
[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] 95706b87f1240243df034e6b66fd2853124b598c3f507c8f7ca321000eb5775c
[INFO] running `Command { std: "docker" "start" "-a" "95706b87f1240243df034e6b66fd2853124b598c3f507c8f7ca321000eb5775c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95706b87f1240243df034e6b66fd2853124b598c3f507c8f7ca321000eb5775c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95706b87f1240243df034e6b66fd2853124b598c3f507c8f7ca321000eb5775c", kill_on_drop: false }`
[INFO] [stdout] 95706b87f1240243df034e6b66fd2853124b598c3f507c8f7ca321000eb5775c
[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] 9dceb3a2a167481132eae6400224372907de53859e57996415d89c53748ff699
[INFO] running `Command { std: "docker" "start" "-a" "9dceb3a2a167481132eae6400224372907de53859e57996415d89c53748ff699", kill_on_drop: false }`
[INFO] [stderr]    Compiling cl-generic-vec v0.3.4
[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/cl-generic-vec-0.3.4/src/lib.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout]  4 | /     feature(
[INFO] [stdout]  5 | |         trusted_len,
[INFO] [stdout]  6 | |         min_specialization,
[INFO] [stdout]  7 | |         exact_size_is_empty,
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | |         ptr_metadata,
[INFO] [stdout] 14 | |     )
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_mut_refs` has been stable since `1.83.0` and no longer requires an attribute to enable
[INFO] [stdout]    = help: the feature `const_mut_refs` has been stable since `1.83.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[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/cl-generic-vec-0.3.4/src/lib.rs:16:58
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![cfg_attr(all(feature = "nightly", feature = "alloc"), feature(new_uninit))]
[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 `cl-generic-vec` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "9dceb3a2a167481132eae6400224372907de53859e57996415d89c53748ff699", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dceb3a2a167481132eae6400224372907de53859e57996415d89c53748ff699", kill_on_drop: false }`
[INFO] [stdout] 9dceb3a2a167481132eae6400224372907de53859e57996415d89c53748ff699