[INFO] fetching crate power-protobuf 0.1.11...
[INFO] testing power-protobuf-0.1.11 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate power-protobuf 0.1.11 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate power-protobuf 0.1.11
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate power-protobuf 0.1.11
[INFO] tweaked toml for crates.io crate power-protobuf 0.1.11 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate power-protobuf 0.1.11 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 power-protobuf 0.1.11 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 8cc959d42566cbb6930849cae458995ac9befc5618d006bd74d50402942c986b
[INFO] running `Command { std: "docker" "start" "-a" "8cc959d42566cbb6930849cae458995ac9befc5618d006bd74d50402942c986b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8cc959d42566cbb6930849cae458995ac9befc5618d006bd74d50402942c986b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cc959d42566cbb6930849cae458995ac9befc5618d006bd74d50402942c986b", kill_on_drop: false }`
[INFO] [stdout] 8cc959d42566cbb6930849cae458995ac9befc5618d006bd74d50402942c986b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 7b0562d7d2050766667bc591bd9943760a0a9b468ef0474b21c9d991bfadc299
[INFO] running `Command { std: "docker" "start" "-a" "7b0562d7d2050766667bc591bd9943760a0a9b468ef0474b21c9d991bfadc299", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling serde v1.0.198
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling hashbrown v0.14.3
[INFO] [stderr]    Compiling winnow v0.6.6
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]    Compiling memchr v2.7.2
[INFO] [stderr]    Compiling convert_case v0.6.0
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.55
[INFO] [stderr]    Compiling serde_derive v1.0.198
[INFO] [stderr]    Compiling syn-prelude-macros v0.1.0
[INFO] [stderr]    Compiling syn-prelude v0.1.3
[INFO] [stderr]    Compiling toml_datetime v0.6.5
[INFO] [stderr]    Compiling serde_spanned v0.6.5
[INFO] [stderr]    Compiling toml_edit v0.22.12
[INFO] [stderr]    Compiling toml v0.8.12
[INFO] [stderr]    Compiling cargo_toml v0.20.0
[INFO] [stderr]    Compiling power-protobuf-lib v0.1.11
[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/power-protobuf-lib-0.1.11/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(split_at_checked)]
[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 `power-protobuf-lib` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "7b0562d7d2050766667bc591bd9943760a0a9b468ef0474b21c9d991bfadc299", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b0562d7d2050766667bc591bd9943760a0a9b468ef0474b21c9d991bfadc299", kill_on_drop: false }`
[INFO] [stdout] 7b0562d7d2050766667bc591bd9943760a0a9b468ef0474b21c9d991bfadc299