[INFO] cloning repository https://github.com/redpfire/dfu-boot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/redpfire/dfu-boot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredpfire%2Fdfu-boot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredpfire%2Fdfu-boot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 50bab48804871974584ac4d484490691c004e969
[INFO] testing redpfire/dfu-boot against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredpfire%2Fdfu-boot" "/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/redpfire/dfu-boot on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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/redpfire/dfu-boot
[INFO] finished tweaking git repo https://github.com/redpfire/dfu-boot
[INFO] tweaked toml for git repo https://github.com/redpfire/dfu-boot written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/redpfire/dfu-boot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--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 stm32-usbd v0.5.1
[INFO] [stderr]   Downloaded embedded-dma v0.1.2
[INFO] [stderr]   Downloaded cortex-m-rtic-macros v0.5.2
[INFO] [stderr]   Downloaded vcell v0.1.3
[INFO] [stderr]   Downloaded rtic-syntax v0.4.0
[INFO] [stderr]   Downloaded usb-device v0.2.8
[INFO] [stderr]   Downloaded as-slice v0.1.4
[INFO] [stderr]   Downloaded cortex-m v0.6.4
[INFO] [stderr]   Downloaded rtic-core v0.3.1
[INFO] [stderr]   Downloaded nb v1.0.0
[INFO] [stderr]   Downloaded bitfield v0.13.2
[INFO] [stderr]   Downloaded cortex-m-rt v0.6.13
[INFO] [stderr]   Downloaded bare-metal v0.2.5
[INFO] [stderr]   Downloaded hash32 v0.1.1
[INFO] [stderr]   Downloaded cortex-m-rt-macros v0.1.8
[INFO] [stderr]   Downloaded nb v0.1.3
[INFO] [stderr]   Downloaded cortex-m-rtic v0.5.5
[INFO] [stderr]   Downloaded heapless v0.5.6
[INFO] [stderr]   Downloaded embedded-hal v0.2.4
[INFO] [stderr]   Downloaded aligned v0.3.4
[INFO] [stderr]   Downloaded stm32f1 v0.11.0
[INFO] [stderr]   Downloaded stm32f1xx-hal v0.7.0
[INFO] [stderr]   Downloaded usbd-webusb v1.0.0
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f29a43299e1571ea87417aab3e82f07b980fa66dbf4306085669abb25036e33
[INFO] running `Command { std: "docker" "start" "-a" "0f29a43299e1571ea87417aab3e82f07b980fa66dbf4306085669abb25036e33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f29a43299e1571ea87417aab3e82f07b980fa66dbf4306085669abb25036e33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f29a43299e1571ea87417aab3e82f07b980fa66dbf4306085669abb25036e33", kill_on_drop: false }`
[INFO] [stdout] 0f29a43299e1571ea87417aab3e82f07b980fa66dbf4306085669abb25036e33
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a2174a47316a532eeda1f779ba7e4d52ba8d389f5a8770800497d03f33b7ee6
[INFO] running `Command { std: "docker" "start" "-a" "0a2174a47316a532eeda1f779ba7e4d52ba8d389f5a8770800497d03f33b7ee6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling cortex-m v0.6.4
[INFO] [stderr]    Compiling vcell v0.1.3
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling cortex-m-rt v0.6.13
[INFO] [stderr]    Compiling bitfield v0.13.2
[INFO] [stderr]    Compiling r0 v0.2.2
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling heapless v0.5.6
[INFO] [stderr]    Compiling byteorder v1.4.2
[INFO] [stderr]    Compiling stm32f1 v0.11.0
[INFO] [stderr]    Compiling nb v1.0.0
[INFO] [stderr]    Compiling usb-device v0.2.8
[INFO] [stderr]    Compiling stm32-usbd v0.5.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling rtic-core v0.3.1
[INFO] [stderr]    Compiling panic-halt v0.2.0
[INFO] [stderr]    Compiling embedded-dma v0.1.2
[INFO] [stderr]    Compiling volatile-register v0.2.0
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling hash32 v0.1.1
[INFO] [stderr]    Compiling embedded-hal v0.2.4
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling cortex-m-rtic v0.5.5
[INFO] [stderr]    Compiling usbd-webusb v1.0.0
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling generic-array v0.13.2
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling as-slice v0.1.4
[INFO] [stderr]    Compiling aligned v0.3.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.6.4/src/lib.rs:32:37
[INFO] [stdout]    |
[INFO] [stdout] 32 | #![cfg_attr(feature = "inline-asm", feature(llvm_asm))]
[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 `cortex-m`
[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" "0a2174a47316a532eeda1f779ba7e4d52ba8d389f5a8770800497d03f33b7ee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a2174a47316a532eeda1f779ba7e4d52ba8d389f5a8770800497d03f33b7ee6", kill_on_drop: false }`
[INFO] [stdout] 0a2174a47316a532eeda1f779ba7e4d52ba8d389f5a8770800497d03f33b7ee6
