[INFO] cloning repository https://github.com/nebelgrau77/STM32F0_clockface_DRAFT
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nebelgrau77/STM32F0_clockface_DRAFT" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnebelgrau77%2FSTM32F0_clockface_DRAFT", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnebelgrau77%2FSTM32F0_clockface_DRAFT'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c6497eed76fba51d4771d628494f79e092ce16ca
[INFO] testing nebelgrau77/STM32F0_clockface_DRAFT against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnebelgrau77%2FSTM32F0_clockface_DRAFT" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nebelgrau77/STM32F0_clockface_DRAFT on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3/source/.cargo/config
[INFO] started tweaking git repo https://github.com/nebelgrau77/STM32F0_clockface_DRAFT
[INFO] finished tweaking git repo https://github.com/nebelgrau77/STM32F0_clockface_DRAFT
[INFO] tweaked toml for git repo https://github.com/nebelgrau77/STM32F0_clockface_DRAFT written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/nebelgrau77/STM32F0_clockface_DRAFT already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d848f7db6556ffc5c698d2aae430cc9e1c6a33c6630ffdfb3894e6016f22ae94
[INFO] running `Command { std: "docker" "start" "-a" "d848f7db6556ffc5c698d2aae430cc9e1c6a33c6630ffdfb3894e6016f22ae94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d848f7db6556ffc5c698d2aae430cc9e1c6a33c6630ffdfb3894e6016f22ae94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d848f7db6556ffc5c698d2aae430cc9e1c6a33c6630ffdfb3894e6016f22ae94", kill_on_drop: false }`
[INFO] [stdout] d848f7db6556ffc5c698d2aae430cc9e1c6a33c6630ffdfb3894e6016f22ae94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cd5215a242d0709aff613c6bfa965997a48cfb7bc5e8fbc76e00aa905cf76d5
[INFO] running `Command { std: "docker" "start" "-a" "7cd5215a242d0709aff613c6bfa965997a48cfb7bc5e8fbc76e00aa905cf76d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling cortex-m v0.6.1
[INFO] [stderr]    Compiling cortex-m-rt v0.6.10
[INFO] [stderr]    Compiling stm32f0 v0.8.0
[INFO] [stderr]    Compiling ssd1306 v0.3.0-alpha.4
[INFO] [stderr]    Compiling cast v0.2.2
[INFO] [stderr]    Compiling arrayvec v0.5.1
[INFO] [stderr]    Compiling panic-halt v0.2.0
[INFO] [stderr]    Compiling as-slice v0.1.0
[INFO] [stderr]    Compiling embedded-graphics v0.6.0-alpha.3
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling aligned v0.3.1
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.5
[INFO] [stderr]    Compiling stm32f0xx-hal v0.15.2
[INFO] [stderr]    Compiling clockface v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(type_ascription)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `image::Image`, `pixelcolor::BinaryColor`
[INFO] [stdout]   --> src/main.rs:13:25
[INFO] [stdout]    |
[INFO] [stdout] 13 | use embedded_graphics::{image::Image, pixelcolor::BinaryColor, prelude::*};
[INFO] [stdout]    |                         ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `prelude`
[INFO] [stdout]   --> src/main.rs:13:64
[INFO] [stdout]    |
[INFO] [stdout] 13 | use embedded_graphics::{image::Image, pixelcolor::BinaryColor, prelude::*};
[INFO] [stdout]    |                                                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 2 warnings 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 `clockface` due to 3 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "7cd5215a242d0709aff613c6bfa965997a48cfb7bc5e8fbc76e00aa905cf76d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cd5215a242d0709aff613c6bfa965997a48cfb7bc5e8fbc76e00aa905cf76d5", kill_on_drop: false }`
[INFO] [stdout] 7cd5215a242d0709aff613c6bfa965997a48cfb7bc5e8fbc76e00aa905cf76d5