[INFO] crate atmega32u4-hal 0.1.4 is already in cache
[INFO] testing atmega32u4-hal-0.1.4 against 1.44.0 for beta-1.45-1
[INFO] extracting crate atmega32u4-hal 0.1.4 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate atmega32u4-hal 0.1.4 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate atmega32u4-hal 0.1.4
[INFO] finished tweaking crates.io crate atmega32u4-hal 0.1.4
[INFO] tweaked toml for crates.io crate atmega32u4-hal 0.1.4 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 698b30ed2145727bf4db3db150ed367207846e3d78cc91e5eb9930f086384f44
[INFO] running `"docker" "start" "-a" "698b30ed2145727bf4db3db150ed367207846e3d78cc91e5eb9930f086384f44"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling vcell v0.1.2
[INFO] [stderr]    Compiling nb v0.1.2
[INFO] [stderr]    Compiling embedded-hal v0.2.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling atmega32u4 v0.1.3
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/atmega32u4-0.1.3/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(asm, const_fn, try_from)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `atmega32u4`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "698b30ed2145727bf4db3db150ed367207846e3d78cc91e5eb9930f086384f44"`
[INFO] running `"docker" "rm" "-f" "698b30ed2145727bf4db3db150ed367207846e3d78cc91e5eb9930f086384f44"`
[INFO] [stdout] 698b30ed2145727bf4db3db150ed367207846e3d78cc91e5eb9930f086384f44