[INFO] fetching crate strawboat 0.2.6...
[INFO] testing strawboat-0.2.6 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate strawboat 0.2.6 into /workspace/builds/worker-1-tc2/source
[INFO] removed /workspace/builds/worker-1-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate strawboat 0.2.6
[INFO] finished tweaking crates.io crate strawboat 0.2.6
[INFO] tweaked toml for crates.io crate strawboat 0.2.6 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate strawboat 0.2.6 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 strawboat 0.2.6 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 1df97f0e22e27a3484dfa9247f087b1a26b9b62ff1a57daded7f484908033ab6
[INFO] running `Command { std: "docker" "start" "-a" "1df97f0e22e27a3484dfa9247f087b1a26b9b62ff1a57daded7f484908033ab6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1df97f0e22e27a3484dfa9247f087b1a26b9b62ff1a57daded7f484908033ab6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1df97f0e22e27a3484dfa9247f087b1a26b9b62ff1a57daded7f484908033ab6", kill_on_drop: false }`
[INFO] [stdout] 1df97f0e22e27a3484dfa9247f087b1a26b9b62ff1a57daded7f484908033ab6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 44cde65ecfa551e5643bee2bec8123c884901404ec83f32c2c62354cebc4f805
[INFO] running `Command { std: "docker" "start" "-a" "44cde65ecfa551e5643bee2bec8123c884901404ec83f32c2c62354cebc4f805", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]    Compiling pin-project-lite v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling async-trait v0.1.72
[INFO] [stderr]    Compiling serde v1.0.175
[INFO] [stderr]    Compiling zstd-safe v6.0.6
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling serde_derive v1.0.175
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling regex-syntax v0.7.4
[INFO] [stderr]    Compiling zstd-safe v5.0.2+zstd.1.5.2
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling zstd v0.12.4
[INFO] [stderr]    Compiling arrow2 v0.17.3
[INFO] [stderr]    Compiling seq-macro v0.3.5
[INFO] [stderr]    Compiling serde_json v1.0.103
[INFO] [stderr]    Compiling xxhash-rust v0.8.6
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling ahash v0.8.3
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling syn v2.0.27
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling hashbrown v0.13.2
[INFO] [stderr]    Compiling num-complex v0.4.3
[INFO] [stderr]    Compiling chrono v0.4.26
[INFO] [stderr]    Compiling regex-automata v0.3.3
[INFO] [stderr]    Compiling retain_mut v0.1.7
[INFO] [stderr]    Compiling dyn-clone v1.0.12
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling ordered-float v3.7.0
[INFO] [stderr]    Compiling zstd v0.11.2+zstd.1.5.2
[INFO] [stderr]    Compiling bitpacking v0.8.4
[INFO] [stderr]    Compiling ringbuffer v0.14.1
[INFO] [stderr]    Compiling arrow-format v0.8.1
[INFO] [stderr]    Compiling num v0.4.1
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling bytemuck_derive v1.4.1
[INFO] [stderr]    Compiling async-stream-impl v0.3.5
[INFO] [stderr]    Compiling bytemuck v1.13.1
[INFO] [stderr]    Compiling regex v1.9.1
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling roaring v0.10.1
[INFO] [stderr]    Compiling async-stream v0.3.5
[INFO] [stderr]    Compiling multiversion-macros v0.7.2
[INFO] [stderr]    Compiling multiversion v0.7.2
[INFO] [stderr]    Compiling futures-executor v0.3.28
[INFO] [stderr]    Compiling futures v0.3.28
[INFO] [stderr]    Compiling parquet-format-safe v0.2.4
[INFO] [stderr]    Compiling parquet2 v0.17.2
[INFO] [stderr]    Compiling strawboat v0.2.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![feature(iter_advance_by)]
[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 `strawboat` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "44cde65ecfa551e5643bee2bec8123c884901404ec83f32c2c62354cebc4f805", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44cde65ecfa551e5643bee2bec8123c884901404ec83f32c2c62354cebc4f805", kill_on_drop: false }`
[INFO] [stdout] 44cde65ecfa551e5643bee2bec8123c884901404ec83f32c2c62354cebc4f805