[INFO] fetching crate immortal-http 0.2.2...
[INFO] testing immortal-http-0.2.2 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate immortal-http 0.2.2 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate immortal-http 0.2.2
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate immortal-http 0.2.2
[INFO] tweaked toml for crates.io crate immortal-http 0.2.2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate immortal-http 0.2.2 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 immortal-http 0.2.2 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] 6e2feb354fae1a54ed8b436536510b10a9052acc70e2b91f414d07ea048d21ef
[INFO] running `Command { std: "docker" "start" "-a" "6e2feb354fae1a54ed8b436536510b10a9052acc70e2b91f414d07ea048d21ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e2feb354fae1a54ed8b436536510b10a9052acc70e2b91f414d07ea048d21ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e2feb354fae1a54ed8b436536510b10a9052acc70e2b91f414d07ea048d21ef", kill_on_drop: false }`
[INFO] [stdout] 6e2feb354fae1a54ed8b436536510b10a9052acc70e2b91f414d07ea048d21ef
[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] e50deb57642bd4e56776143bb0f66c3eadbfa3f8b18ee6e4c67d2ee7a968e71f
[INFO] running `Command { std: "docker" "start" "-a" "e50deb57642bd4e56776143bb0f66c3eadbfa3f8b18ee6e4c67d2ee7a968e71f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.87
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling portable-atomic v1.9.0
[INFO] [stderr]    Compiling either v1.13.0
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling debug_print v1.0.0
[INFO] [stderr]    Compiling colored v2.1.0
[INFO] [stderr]    Compiling chrono v0.4.38
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling atomic-time v0.1.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]    Compiling crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling dashmap v6.1.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling uuid v1.10.0
[INFO] [stderr]    Compiling immortal-http v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.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 `immortal-http` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "e50deb57642bd4e56776143bb0f66c3eadbfa3f8b18ee6e4c67d2ee7a968e71f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e50deb57642bd4e56776143bb0f66c3eadbfa3f8b18ee6e4c67d2ee7a968e71f", kill_on_drop: false }`
[INFO] [stdout] e50deb57642bd4e56776143bb0f66c3eadbfa3f8b18ee6e4c67d2ee7a968e71f