[INFO] fetching crate ws2812-nop-imxrt1062 0.2.0...
[INFO] testing ws2812-nop-imxrt1062-0.2.0 against 1.76.0 for beta-1.77-1
[INFO] extracting crate ws2812-nop-imxrt1062 0.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate ws2812-nop-imxrt1062 0.2.0 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ws2812-nop-imxrt1062 0.2.0
[INFO] finished tweaking crates.io crate ws2812-nop-imxrt1062 0.2.0
[INFO] tweaked toml for crates.io crate ws2812-nop-imxrt1062 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff232ae37604360361d2924a95917fc4f23d7efb19d9b900c6c7824d3697bb81
[INFO] running `Command { std: "docker" "start" "-a" "ff232ae37604360361d2924a95917fc4f23d7efb19d9b900c6c7824d3697bb81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff232ae37604360361d2924a95917fc4f23d7efb19d9b900c6c7824d3697bb81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff232ae37604360361d2924a95917fc4f23d7efb19d9b900c6c7824d3697bb81", kill_on_drop: false }`
[INFO] [stdout] ff232ae37604360361d2924a95917fc4f23d7efb19d9b900c6c7824d3697bb81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a1dac783b88f81a5e2ee4df4b0c1738ec1f54f3b0dadc3696c913bd7328e6bb4
[INFO] running `Command { std: "docker" "start" "-a" "a1dac783b88f81a5e2ee4df4b0c1738ec1f54f3b0dadc3696c913bd7328e6bb4", kill_on_drop: false }`
[INFO] [stderr]    Compiling nb v1.1.0
[INFO] [stderr]    Compiling bytemuck v1.14.3
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling rgb v0.8.37
[INFO] [stderr]    Compiling smart-leds-trait v0.2.1
[INFO] [stderr]    Compiling ws2812-nop-imxrt1062 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn_floating_point_arithmetic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: formatting may not be suitable for sub-register argument
[INFO] [stdout]    --> src/lib.rs:112:30
[INFO] [stdout]     |
[INFO] [stdout] 112 |                 "mov     r2, {0}",
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 121 |                 in(reg) loops
[INFO] [stdout]     |                         ----- for this argument
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `{0:e}` to have the register formatted as `eax`
[INFO] [stdout]     = help: or use `{0:r}` to keep the default formatting of `rax`
[INFO] [stdout]     = note: `#[warn(asm_sub_register)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ws2812-nop-imxrt1062` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "a1dac783b88f81a5e2ee4df4b0c1738ec1f54f3b0dadc3696c913bd7328e6bb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1dac783b88f81a5e2ee4df4b0c1738ec1f54f3b0dadc3696c913bd7328e6bb4", kill_on_drop: false }`
[INFO] [stdout] a1dac783b88f81a5e2ee4df4b0c1738ec1f54f3b0dadc3696c913bd7328e6bb4
