[INFO] crate system76_ectool 0.1.3 is already in cache
[INFO] testing system76_ectool-0.1.3 against 1.44.0 for beta-1.45-1
[INFO] extracting crate system76_ectool 0.1.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate system76_ectool 0.1.3 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 system76_ectool 0.1.3
[INFO] finished tweaking crates.io crate system76_ectool 0.1.3
[INFO] tweaked toml for crates.io crate system76_ectool 0.1.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate system76_ectool 0.1.3 already has a lockfile, it will not be regenerated
[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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 2ee908c732befaa380b0b1372460011e2dd0a54e3284e164d5e7d5018335aec0
[INFO] running `"docker" "start" "-a" "2ee908c732befaa380b0b1372460011e2dd0a54e3284e164d5e7d5018335aec0"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling redox_hwio v0.1.1
[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/redox_hwio-0.1.1/src/lib.rs:2:93
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![cfg_attr(all(not(feature = "stable"), any(target_arch = "x86", target_arch = "x86_64")), feature(asm))]
[INFO] [stderr]   |                                                                                             ^^^^^^^^^^^^
[INFO] [stderr] 
[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/redox_hwio-0.1.1/src/lib.rs:3:38
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![cfg_attr(not(feature = "stable"), feature(const_fn))]
[INFO] [stderr]   |                                      ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `redox_hwio`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2ee908c732befaa380b0b1372460011e2dd0a54e3284e164d5e7d5018335aec0"`
[INFO] running `"docker" "rm" "-f" "2ee908c732befaa380b0b1372460011e2dd0a54e3284e164d5e7d5018335aec0"`
[INFO] [stdout] 2ee908c732befaa380b0b1372460011e2dd0a54e3284e164d5e7d5018335aec0