[INFO] fetching crate isfet 0.1.3...
[INFO] testing isfet-0.1.3 against beta-2026-03-05 for beta-1.95-1
[INFO] extracting crate isfet 0.1.3 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate isfet 0.1.3
[INFO] finished tweaking crates.io crate isfet 0.1.3
[INFO] tweaked toml for crates.io crate isfet 0.1.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate isfet 0.1.3 on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate isfet 0.1.3 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-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab8fd2e9fbef90643daa2c1f4985ca714a6e3a275288bd6687b9506c55fc766a
[INFO] running `Command { std: "docker" "start" "-a" "ab8fd2e9fbef90643daa2c1f4985ca714a6e3a275288bd6687b9506c55fc766a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab8fd2e9fbef90643daa2c1f4985ca714a6e3a275288bd6687b9506c55fc766a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab8fd2e9fbef90643daa2c1f4985ca714a6e3a275288bd6687b9506c55fc766a", kill_on_drop: false }`
[INFO] [stdout] ab8fd2e9fbef90643daa2c1f4985ca714a6e3a275288bd6687b9506c55fc766a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6000b1b787904e087030541eadc6204f1f00fe60e632057c720bf6abaa7619e9
[INFO] running `Command { std: "docker" "start" "-a" "6000b1b787904e087030541eadc6204f1f00fe60e632057c720bf6abaa7619e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]    Compiling rustversion v1.0.17
[INFO] [stderr]    Compiling camino v1.1.9
[INFO] [stderr]    Compiling ryu v1.0.18
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.76
[INFO] [stderr]    Compiling castaway v0.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.209
[INFO] [stderr]    Compiling compact_str v0.8.0
[INFO] [stderr]    Compiling isfet v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `camino::Utf8PathBuf`
[INFO] [stdout]  --> src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use camino::Utf8PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0539]: malformed `feature` attribute input
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[feature("serde_feature")]
[INFO] [stdout]   | ^^^^^^^^^^---------------^^
[INFO] [stdout]   | |         |
[INFO] [stdout]   | |         expected a valid identifier here
[INFO] [stdout]   | help: must be of the form: `#[feature(feature1, feature2, ...)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0539]: malformed `feature` attribute input
[INFO] [stdout]    --> src/lib.rs:262:1
[INFO] [stdout]     |
[INFO] [stdout] 262 | #[feature("serde_feature")]
[INFO] [stdout]     | ^^^^^^^^^^---------------^^
[INFO] [stdout]     | |         |
[INFO] [stdout]     | |         expected a valid identifier here
[INFO] [stdout]     | help: must be of the form: `#[feature(feature1, feature2, ...)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![feature]`
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[feature("serde_feature")]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: this attribute does not have an `!`, which means it is applied to this use
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![feature]`
[INFO] [stdout]    --> src/lib.rs:262:1
[INFO] [stdout]     |
[INFO] [stdout] 262 | #[feature("serde_feature")]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: this attribute does not have an `!`, which means it is applied to this enum
[INFO] [stdout]    --> src/lib.rs:265:1
[INFO] [stdout]     |
[INFO] [stdout] 265 | / pub enum Either<L, R> {
[INFO] [stdout] 266 | |     Left(L),
[INFO] [stdout] 267 | |     Right(R),
[INFO] [stdout] 268 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `isfet` (lib) due to 2 previous errors; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0539`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6000b1b787904e087030541eadc6204f1f00fe60e632057c720bf6abaa7619e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6000b1b787904e087030541eadc6204f1f00fe60e632057c720bf6abaa7619e9", kill_on_drop: false }`
[INFO] [stdout] 6000b1b787904e087030541eadc6204f1f00fe60e632057c720bf6abaa7619e9