[INFO] crate ruspiro-interrupt-core 0.2.0 is already in cache
[INFO] testing ruspiro-interrupt-core-0.2.0 against 1.38.0 for beta-1.39-1
[INFO] extracting crate ruspiro-interrupt-core 0.2.0 into work/builds/worker-2/source
[INFO] validating manifest of crates.io crate ruspiro-interrupt-core 0.2.0 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ruspiro-interrupt-core 0.2.0
[INFO] finished tweaking crates.io crate ruspiro-interrupt-core 0.2.0
[INFO] tweaked toml for crates.io crate ruspiro-interrupt-core 0.2.0 written to work/builds/worker-2/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 9444e7d6c17c34f45738a7534740513f4c2041e54f7b6c0f7d8943e87fe33947
[INFO] running `"docker" "start" "-a" "9444e7d6c17c34f45738a7534740513f4c2041e54f7b6c0f7d8943e87fe33947"`
[INFO] [stderr]    Compiling ruspiro-interrupt-core v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(asm)]
[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 `ruspiro-interrupt-core`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9444e7d6c17c34f45738a7534740513f4c2041e54f7b6c0f7d8943e87fe33947"`
[INFO] running `"docker" "rm" "-f" "9444e7d6c17c34f45738a7534740513f4c2041e54f7b6c0f7d8943e87fe33947"`
[INFO] [stdout] 9444e7d6c17c34f45738a7534740513f4c2041e54f7b6c0f7d8943e87fe33947