[INFO] cloning repository https://github.com/mmou/rgbw-led-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mmou/rgbw-led-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmou%2Frgbw-led-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmou%2Frgbw-led-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d51bb8e1263cc97ce62d392d8d65a7e572ef2c34
[INFO] checking mmou/rgbw-led-rs against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmou%2Frgbw-led-rs" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mmou/rgbw-led-rs on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0/source/.cargo/config
[INFO] started tweaking git repo https://github.com/mmou/rgbw-led-rs
[INFO] finished tweaking git repo https://github.com/mmou/rgbw-led-rs
[INFO] tweaked toml for git repo https://github.com/mmou/rgbw-led-rs written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/mmou/rgbw-led-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nb v0.1.1
[INFO] [stderr]   Downloaded cortex-m-rt-macros v0.1.5
[INFO] [stderr]   Downloaded embedded-hal v0.2.2
[INFO] [stderr]   Downloaded owned-singleton v0.1.0
[INFO] [stderr]   Downloaded cortex-m-rtfm v0.4.2
[INFO] [stderr]   Downloaded hash32 v0.1.0
[INFO] [stderr]   Downloaded heapless v0.4.2
[INFO] [stderr]   Downloaded owned-singleton-macros v0.1.0
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.4
[INFO] [stderr]   Downloaded aligned v0.2.0
[INFO] [stderr]   Downloaded cortex-m-rt v0.6.7
[INFO] [stderr]   Downloaded vcell v0.1.0
[INFO] [stderr]   Downloaded cortex-m-semihosting v0.3.2
[INFO] [stderr]   Downloaded stm32f1xx-hal v0.2.1
[INFO] [stderr]   Downloaded panic-semihosting v0.5.1
[INFO] [stderr]   Downloaded bare-metal v0.2.4
[INFO] [stderr]   Downloaded cortex-m-rtfm-macros v0.4.2
[INFO] [stderr]   Downloaded cortex-m v0.5.8
[INFO] [stderr]   Downloaded stm32f1 v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b7cd0567c541fcfe24fa3d4b33f423d752b8d9d1c599e4067da40debd3078180
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b7cd0567c541fcfe24fa3d4b33f423d752b8d9d1c599e4067da40debd3078180", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7cd0567c541fcfe24fa3d4b33f423d752b8d9d1c599e4067da40debd3078180", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7cd0567c541fcfe24fa3d4b33f423d752b8d9d1c599e4067da40debd3078180", kill_on_drop: false }`
[INFO] [stdout] b7cd0567c541fcfe24fa3d4b33f423d752b8d9d1c599e4067da40debd3078180
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=forbid" "-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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6203555fb5fb62f50ba86dbd5315e20e34324c333a17e773c27fcd57cff52d99
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6203555fb5fb62f50ba86dbd5315e20e34324c333a17e773c27fcd57cff52d99", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]     Checking vcell v0.1.0
[INFO] [stderr]     Checking aligned v0.2.0
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]     Checking nb v0.1.1
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking cast v0.2.2
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking rgb v0.8.13
[INFO] [stderr]     Checking usb-device v0.2.0 (https://github.com/mvirkkunen/usb-device?rev=e58e30f3b9c9bf4aab00ea039d129b964a3fd2d3#e58e30f3)
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling stm32f1 v0.6.0
[INFO] [stderr]    Compiling cortex-m-rtfm v0.4.2
[INFO] [stderr]    Compiling cortex-m v0.5.8
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling cortex-m-rt v0.6.7
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.2
[INFO] [stderr]    Compiling bare-metal v0.2.4
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]     Checking embedded-hal v0.2.2
[INFO] [stderr]     Checking hash32 v0.1.0
[INFO] [stderr]     Checking generic-array v0.11.1
[INFO] [stderr]     Checking panic-semihosting v0.5.1
[INFO] [stderr]     Checking smart-leds-trait v0.1.1 (https://github.com/evq/smart-leds-trait?branch=wip#5727e380)
[INFO] [stderr]     Checking heapless v0.4.2
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.4
[INFO] [stderr]    Compiling owned-singleton-macros v0.1.0
[INFO] [stderr]    Compiling cortex-m-rtfm-macros v0.4.2
[INFO] [stderr]     Checking owned-singleton v0.1.0
[INFO] [stderr]    Compiling gamma-lut-macro v0.1.0 (https://github.com/evq/ditherable-leds?branch=master#61675073)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/ditherable-leds-1610cab12ce2033b/6167507/gamma-lut-macro/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gamma-lut-macro`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6203555fb5fb62f50ba86dbd5315e20e34324c333a17e773c27fcd57cff52d99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6203555fb5fb62f50ba86dbd5315e20e34324c333a17e773c27fcd57cff52d99", kill_on_drop: false }`
[INFO] [stdout] 6203555fb5fb62f50ba86dbd5315e20e34324c333a17e773c27fcd57cff52d99