[INFO] cloning repository https://github.com/ssnover95/avr-programming-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ssnover95/avr-programming-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fssnover95%2Favr-programming-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fssnover95%2Favr-programming-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 20e5152802e553792ab66c2547da2f9e43033e60
[INFO] testing ssnover95/avr-programming-rs against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fssnover95%2Favr-programming-rs" "/workspace/builds/worker-18/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-18/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ssnover95/avr-programming-rs on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ssnover95/avr-programming-rs
[INFO] finished tweaking git repo https://github.com/ssnover95/avr-programming-rs
[INFO] tweaked toml for git repo https://github.com/ssnover95/avr-programming-rs written to /workspace/builds/worker-18/source/Cargo.toml
[INFO] crate git repo https://github.com/ssnover95/avr-programming-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded xmltree v0.10.1
[INFO] [stderr]   Downloaded avr-std-stub v1.0.2
[INFO] [stderr]   Downloaded target-cpu-fetch v0.1.1
[INFO] [stderr]   Downloaded target-cpu-macro v0.1.1
[INFO] [stderr]   Downloaded avr-mcu v0.3.4
[INFO] [stderr]   Downloaded ruduino v0.2.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b4f26a7e73f620a6bae14883f43c34d4058d06f1990285d43aea94484e75d25d
[INFO] running `Command { std: "docker" "start" "-a" "b4f26a7e73f620a6bae14883f43c34d4058d06f1990285d43aea94484e75d25d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4f26a7e73f620a6bae14883f43c34d4058d06f1990285d43aea94484e75d25d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4f26a7e73f620a6bae14883f43c34d4058d06f1990285d43aea94484e75d25d", kill_on_drop: false }`
[INFO] [stdout] b4f26a7e73f620a6bae14883f43c34d4058d06f1990285d43aea94484e75d25d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 729ea912a50b2fe9ac1e6b9ff23d6821352515c7dea865896f1cb8b1aae9f6e1
[INFO] running `Command { std: "docker" "start" "-a" "729ea912a50b2fe9ac1e6b9ff23d6821352515c7dea865896f1cb8b1aae9f6e1", kill_on_drop: false }`
[INFO] [stderr]    Compiling json v0.12.4
[INFO] [stderr]    Compiling xml-rs v0.8.3
[INFO] [stderr]    Compiling avr-std-stub v1.0.2
[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/avr-std-stub-1.0.2/src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(lang_items)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `avr-std-stub` due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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" "729ea912a50b2fe9ac1e6b9ff23d6821352515c7dea865896f1cb8b1aae9f6e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "729ea912a50b2fe9ac1e6b9ff23d6821352515c7dea865896f1cb8b1aae9f6e1", kill_on_drop: false }`
[INFO] [stdout] 729ea912a50b2fe9ac1e6b9ff23d6821352515c7dea865896f1cb8b1aae9f6e1