[INFO] fetching crate ssplit 1.0.0...
[INFO] testing ssplit-1.0.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate ssplit 1.0.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate ssplit 1.0.0
[INFO] finished tweaking crates.io crate ssplit 1.0.0
[INFO] tweaked toml for crates.io crate ssplit 1.0.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ssplit 1.0.0 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] crate crates.io crate ssplit 1.0.0 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] d3f02288fabed7c73f1fb631f5212084a1423eba4e18f4607b412b19c59a14e6
[INFO] running `Command { std: "docker" "start" "-a" "d3f02288fabed7c73f1fb631f5212084a1423eba4e18f4607b412b19c59a14e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3f02288fabed7c73f1fb631f5212084a1423eba4e18f4607b412b19c59a14e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3f02288fabed7c73f1fb631f5212084a1423eba4e18f4607b412b19c59a14e6", kill_on_drop: false }`
[INFO] [stdout] d3f02288fabed7c73f1fb631f5212084a1423eba4e18f4607b412b19c59a14e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 1d0ce8e875f20d91ed159c889d23ad018f15570ecbac965c399b25a716f450c6
[INFO] running `Command { std: "docker" "start" "-a" "1d0ce8e875f20d91ed159c889d23ad018f15570ecbac965c399b25a716f450c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]    Compiling anstyle-query v1.0.0
[INFO] [stderr]    Compiling anstyle v1.0.3
[INFO] [stderr]    Compiling anyhow v1.0.75
[INFO] [stderr]    Compiling clap_lex v0.5.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling anstyle-parse v0.2.1
[INFO] [stderr]    Compiling anstream v0.5.0
[INFO] [stderr]    Compiling clap_builder v4.4.4
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling console v0.15.7
[INFO] [stderr]    Compiling syn v2.0.37
[INFO] [stderr]    Compiling clap_derive v4.4.2
[INFO] [stderr]    Compiling clap v4.4.4
[INFO] [stderr]    Compiling ssplit v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iter_intersperse)]
[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 `ssplit` (bin "ssplit") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "1d0ce8e875f20d91ed159c889d23ad018f15570ecbac965c399b25a716f450c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d0ce8e875f20d91ed159c889d23ad018f15570ecbac965c399b25a716f450c6", kill_on_drop: false }`
[INFO] [stdout] 1d0ce8e875f20d91ed159c889d23ad018f15570ecbac965c399b25a716f450c6