[INFO] fetching crate rak811-at-driver 0.2.0...
[INFO] testing rak811-at-driver-0.2.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate rak811-at-driver 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate rak811-at-driver 0.2.0
[INFO] finished tweaking crates.io crate rak811-at-driver 0.2.0
[INFO] tweaked toml for crates.io crate rak811-at-driver 0.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rak811-at-driver 0.2.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 38 packages to latest compatible versions
[INFO] [stderr]       Adding arrayvec v0.6.1 (available: v0.7.6)
[INFO] [stderr]       Adding embassy-sync v0.1.0 (available: v0.7.2)
[INFO] [stderr]       Adding embassy-time v0.1.5 (available: v0.5.0)
[INFO] [stderr]       Adding embedded-hal v1.0.0-alpha.11 (available: v1.0.0)
[INFO] [stderr]       Adding embedded-hal-async v0.2.0-alpha.2 (available: v1.0.0)
[INFO] [stderr]       Adding embedded-io v0.4.0 (available: v0.7.1)
[INFO] [stderr]       Adding embedded-nal-async v0.3.0 (available: v0.9.0)
[INFO] [stderr]       Adding futures-intrusive v0.4.2 (available: v0.5.0)
[INFO] [stderr]       Adding heapless v0.7.17 (available: v0.9.1)
[INFO] [stderr]       Adding memchr v2.3.4 (available: v2.7.6)
[INFO] [stderr]       Adding nom v6.2.2 (available: v8.0.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4fc4336a3d9587c84b2edc5cd5773db05844e7574356e87f4deb39c86afa3fc3
[INFO] running `Command { std: "docker" "start" "-a" "4fc4336a3d9587c84b2edc5cd5773db05844e7574356e87f4deb39c86afa3fc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4fc4336a3d9587c84b2edc5cd5773db05844e7574356e87f4deb39c86afa3fc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fc4336a3d9587c84b2edc5cd5773db05844e7574356e87f4deb39c86afa3fc3", kill_on_drop: false }`
[INFO] [stdout] 4fc4336a3d9587c84b2edc5cd5773db05844e7574356e87f4deb39c86afa3fc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f2591dd186c0cce32ebf364f5471f7e2d9445f61134b6470bc9f34a65e61b42
[INFO] running `Command { std: "docker" "start" "-a" "2f2591dd186c0cce32ebf364f5471f7e2d9445f61134b6470bc9f34a65e61b42", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.27
[INFO] [stderr]    Compiling nb v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling hash32 v0.2.1
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling critical-section v1.2.0
[INFO] [stderr]    Compiling atomic-polyfill v1.0.3
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling nom v6.2.2
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling no-std-net v0.5.0
[INFO] [stderr]    Compiling embassy-time v0.1.5
[INFO] [stderr]    Compiling embassy-sync v0.1.0
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling embedded-io v0.4.0
[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/embedded-io-0.4.0/src/lib.rs:2:32
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![cfg_attr(feature = "async", feature(async_fn_in_trait, impl_trait_projections))]
[INFO] [stdout]   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `impl_trait_projections` has been stable since `1.74.0` and no longer requires an attribute to enable
[INFO] [stdout]   = help: the feature `impl_trait_projections` has been stable since `1.74.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `embedded-io` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2f2591dd186c0cce32ebf364f5471f7e2d9445f61134b6470bc9f34a65e61b42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f2591dd186c0cce32ebf364f5471f7e2d9445f61134b6470bc9f34a65e61b42", kill_on_drop: false }`
[INFO] [stdout] 2f2591dd186c0cce32ebf364f5471f7e2d9445f61134b6470bc9f34a65e61b42