[INFO] fetching crate len_mtime 0.1.13...
[INFO] testing len_mtime-0.1.13 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate len_mtime 0.1.13 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate len_mtime 0.1.13
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate len_mtime 0.1.13
[INFO] tweaked toml for crates.io crate len_mtime 0.1.13 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate len_mtime 0.1.13 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 130 packages to latest compatible versions
[INFO] [stderr]       Adding fjall v2.5.0 (available: v2.11.2)
[INFO] [stderr]       Adding lsm-tree v2.5.0 (available: v2.10.4)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] bed4f1a786ba2193e2fc6fb12389761b95e400e62b9ba40109683c8153c782c1
[INFO] running `Command { std: "docker" "start" "-a" "bed4f1a786ba2193e2fc6fb12389761b95e400e62b9ba40109683c8153c782c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bed4f1a786ba2193e2fc6fb12389761b95e400e62b9ba40109683c8153c782c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bed4f1a786ba2193e2fc6fb12389761b95e400e62b9ba40109683c8153c782c1", kill_on_drop: false }`
[INFO] [stdout] bed4f1a786ba2193e2fc6fb12389761b95e400e62b9ba40109683c8153c782c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 474131eaf2546568a48bf638f71e72b637bd57c35d8584abb56b581766f2a838
[INFO] running `Command { std: "docker" "start" "-a" "474131eaf2546568a48bf638f71e72b637bd57c35d8584abb56b581766f2a838", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustix v1.1.2
[INFO] [stderr]    Compiling linux-raw-sys v0.11.0
[INFO] [stderr]    Compiling anyhow v1.0.100
[INFO] [stderr]    Compiling static_init_macro v1.0.4
[INFO] [stderr]    Compiling path-dedot v3.1.1
[INFO] [stderr]    Compiling cfg_aliases v0.2.1
[INFO] [stderr]    Compiling compare v0.0.6
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling virtue v0.0.18
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling byteview v0.6.1
[INFO] [stderr]    Compiling xxhash-rust v0.8.15
[INFO] [stderr]    Compiling hashbrown v0.15.5
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling varint-rs v2.2.0
[INFO] [stderr]    Compiling static_init v1.0.4
[INFO] [stderr]    Compiling path-absolutize v3.1.1
[INFO] [stderr]    Compiling rustc-hash v2.1.1
[INFO] [stderr]    Compiling interval-heap v0.0.5
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]    Compiling crossbeam-skiplist v0.1.3
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling crossbeam-channel v0.5.15
[INFO] [stderr]    Compiling self_cell v1.2.0
[INFO] [stderr]    Compiling lz4_flex v0.11.5
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling double-ended-peekable v0.1.0
[INFO] [stderr]    Compiling unty v0.0.4
[INFO] [stderr]    Compiling guardian v1.3.0
[INFO] [stderr]    Compiling gxhash v3.5.0
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling std-semaphore v0.1.0
[INFO] [stderr]    Compiling aok v0.1.17
[INFO] [stderr]    Compiling xerr v0.1.16
[INFO] [stderr]    Compiling trait_len v0.2.12
[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/trait_len-0.2.12/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[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 `trait_len` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "474131eaf2546568a48bf638f71e72b637bd57c35d8584abb56b581766f2a838", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "474131eaf2546568a48bf638f71e72b637bd57c35d8584abb56b581766f2a838", kill_on_drop: false }`
[INFO] [stdout] 474131eaf2546568a48bf638f71e72b637bd57c35d8584abb56b581766f2a838