[INFO] cloning repository https://github.com/ExplodingWaffle/avr-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ExplodingWaffle/avr-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FExplodingWaffle%2Favr-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FExplodingWaffle%2Favr-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4e3a012bcc24d9f465543adbc18ef61bd94e5a42
[INFO] checking ExplodingWaffle/avr-example against beta-2021-10-15 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FExplodingWaffle%2Favr-example" "/workspace/builds/worker-51/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-51/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ExplodingWaffle/avr-example on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-51/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/ExplodingWaffle/avr-example
[INFO] finished tweaking git repo https://github.com/ExplodingWaffle/avr-example
[INFO] tweaked toml for git repo https://github.com/ExplodingWaffle/avr-example written to /workspace/builds/worker-51/source/Cargo.toml
[INFO] crate git repo https://github.com/ExplodingWaffle/avr-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/lperlaki/avr-hal`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bare-metal v1.0.0
[INFO] [stderr]   Downloaded ufmt-write v0.1.0
[INFO] [stderr]   Downloaded usb-device v0.2.7
[INFO] [stderr]   Downloaded ufmt-macros v0.1.1
[INFO] [stderr]   Downloaded usbd-serial v0.1.1
[INFO] [stderr]   Downloaded avr-device-macros v0.2.3
[INFO] [stderr]   Downloaded ufmt v0.1.0
[INFO] [stderr]   Downloaded avr-device v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] caebc45f82bcb59e879f4d859ca020a49ddee8febb268ffb0ccf176a5c9397e9
[INFO] running `Command { std: "docker" "start" "-a" "caebc45f82bcb59e879f4d859ca020a49ddee8febb268ffb0ccf176a5c9397e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "caebc45f82bcb59e879f4d859ca020a49ddee8febb268ffb0ccf176a5c9397e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "caebc45f82bcb59e879f4d859ca020a49ddee8febb268ffb0ccf176a5c9397e9", kill_on_drop: false }`
[INFO] [stdout] caebc45f82bcb59e879f4d859ca020a49ddee8febb268ffb0ccf176a5c9397e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22940498c3fcbc2463321756efd6ed6db3cd1725d00b27cb9fdc40cc11f69655
[INFO] running `Command { std: "docker" "start" "-a" "22940498c3fcbc2463321756efd6ed6db3cd1725d00b27cb9fdc40cc11f69655", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling paste v1.0.4
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking vcell v0.1.2
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking usb-device v0.2.7
[INFO] [stderr]     Checking panic-halt v0.2.0
[INFO] [stderr]     Checking bare-metal v1.0.0
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking embedded-hal v0.2.4
[INFO] [stderr]     Checking usbd-serial v0.1.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling avr-device-macros v0.2.3
[INFO] [stderr]    Compiling ufmt-macros v0.1.1
[INFO] [stderr]     Checking avr-device v0.2.3
[INFO] [stderr]     Checking ufmt v0.1.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-device-0.2.3/src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | #![feature(llvm_asm)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-device-0.2.3/src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | #![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 `avr-device` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "22940498c3fcbc2463321756efd6ed6db3cd1725d00b27cb9fdc40cc11f69655", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22940498c3fcbc2463321756efd6ed6db3cd1725d00b27cb9fdc40cc11f69655", kill_on_drop: false }`
[INFO] [stdout] 22940498c3fcbc2463321756efd6ed6db3cd1725d00b27cb9fdc40cc11f69655