[INFO] cloning repository https://github.com/VovaGal/WS2812B-driver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VovaGal/WS2812B-driver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVovaGal%2FWS2812B-driver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVovaGal%2FWS2812B-driver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] badb9a81aa83ae71c3ef1d188112effcb9cfcf7b
[INFO] testing VovaGal/WS2812B-driver against beta-2026-04-21 for beta-1.96-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVovaGal%2FWS2812B-driver" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-4-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/VovaGal/WS2812B-driver
[INFO] finished tweaking git repo https://github.com/VovaGal/WS2812B-driver
[INFO] tweaked toml for git repo https://github.com/VovaGal/WS2812B-driver written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/VovaGal/WS2812B-driver on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/VovaGal/WS2812B-driver 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-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fugit-timer v0.1.3
[INFO] [stderr]   Downloaded deranged v0.3.10
[INFO] [stderr]   Downloaded embedded-storage v0.2.0
[INFO] [stderr]   Downloaded smart-leds-trait v0.2.1
[INFO] [stderr]   Downloaded rgb v0.8.37
[INFO] [stderr]   Downloaded embedded-hal v1.0.0-alpha.8
[INFO] [stderr]   Downloaded stm32f4xx-hal v0.15.0
[INFO] [stderr]   Downloaded stm32f4 v0.15.1
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 24b198aa75a919b20588732e0e0fb9a93ab1fecc53689b459913063e50c09450
[INFO] running `Command { std: "docker" "start" "-a" "24b198aa75a919b20588732e0e0fb9a93ab1fecc53689b459913063e50c09450", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "24b198aa75a919b20588732e0e0fb9a93ab1fecc53689b459913063e50c09450", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24b198aa75a919b20588732e0e0fb9a93ab1fecc53689b459913063e50c09450", kill_on_drop: false }`
[INFO] [stdout] 24b198aa75a919b20588732e0e0fb9a93ab1fecc53689b459913063e50c09450
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6f60ef0d8ae2530a9d24b8b3115fc8426e06bf621927c8045770c79ec244075
[INFO] running `Command { std: "docker" "start" "-a" "d6f60ef0d8ae2530a9d24b8b3115fc8426e06bf621927c8045770c79ec244075", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.70
[INFO] [stderr]    Compiling nb v1.1.0
[INFO] [stderr]    Compiling cortex-m v0.7.7
[INFO] [stderr]    Compiling cortex-m-rt v0.7.3
[INFO] [stderr]    Compiling critical-section v1.1.2
[INFO] [stderr]    Compiling defmt v0.3.5
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling vcell v0.1.3
[INFO] [stderr]    Compiling defmt-macros v0.3.6
[INFO] [stderr]    Compiling bitfield v0.13.2
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]    Compiling thiserror v1.0.50
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling gcd v2.3.0
[INFO] [stderr]    Compiling stm32f4 v0.15.1
[INFO] [stderr]    Compiling deranged v0.3.10
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling bytemuck v1.14.0
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling volatile-register v0.2.2
[INFO] [stderr]    Compiling fugit v0.3.7
[INFO] [stderr]    Compiling bare-metal v1.0.0
[INFO] [stderr]    Compiling wyz v0.5.1
[INFO] [stderr]    Compiling rgb v0.8.37
[INFO] [stderr]    Compiling embedded-dma v0.2.0
[INFO] [stderr]    Compiling embedded-hal v1.0.0-alpha.8
[INFO] [stderr]    Compiling panic-probe v0.3.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling funty v2.0.0
[INFO] [stderr]    Compiling embedded-storage v0.2.0
[INFO] [stderr]    Compiling defmt-rtt v0.4.0
[INFO] [stderr]    Compiling anyhow v1.0.75
[INFO] [stderr]    Compiling ws2812b-driver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling smart-leds-trait v0.2.1
[INFO] [stderr]    Compiling fugit-timer v0.1.3
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling bitvec v1.0.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling time v0.3.30
[INFO] [stderr]    Compiling thiserror-impl v1.0.50
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.7.0
[INFO] [stderr]    Compiling defmt-parser v0.3.3
[INFO] [stderr]    Compiling stm32f4xx-hal v0.15.0
[INFO] [stderr]    Compiling pwm-dma v0.1.1 (/opt/rustwide/workdir/pwm-dma)
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unwinding panics are not supported without std
[INFO] [stdout]   |
[INFO] [stdout]   = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding
[INFO] [stdout]   = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ws2812b-driver` (bin "ws2812b-driver") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d6f60ef0d8ae2530a9d24b8b3115fc8426e06bf621927c8045770c79ec244075", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6f60ef0d8ae2530a9d24b8b3115fc8426e06bf621927c8045770c79ec244075", kill_on_drop: false }`
[INFO] [stdout] d6f60ef0d8ae2530a9d24b8b3115fc8426e06bf621927c8045770c79ec244075