Dec 02 06:09:01.275 INFO testing KuroAku/complex against 1.30.1 for beta-1.31-5
Dec 02 06:09:01.275 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-6/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/beta-1.31-5/1.30.1:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 06:09:01.471 INFO [stdout] d5698d2cbe754a8bc6235fd3bb37608f848340b073744f64fcb33c2bb0d45bbd
Dec 02 06:09:01.476 INFO running `"docker" "start" "-a" "d5698d2cbe754a8bc6235fd3bb37608f848340b073744f64fcb33c2bb0d45bbd"`
Dec 02 06:09:02.012 INFO [stderr] usermod: no changes
Dec 02 06:09:02.056 INFO [stderr]    Compiling text_io v0.1.6
Dec 02 06:09:02.057 INFO [stderr]    Compiling regex v0.2.2
Dec 02 06:09:07.966 INFO [stderr]    Compiling complex v0.1.0 (/source)
Dec 02 06:09:08.729 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 06:09:08.729 INFO [stderr]  --> src/main.rs:1:1
Dec 02 06:09:08.729 INFO [stderr]   |
Dec 02 06:09:08.729 INFO [stderr] 1 | #![feature(use_extern_macros)]
Dec 02 06:09:08.729 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 06:09:08.729 INFO [stderr] 
Dec 02 06:09:08.730 INFO [stderr] error: aborting due to previous error
Dec 02 06:09:08.730 INFO [stderr] 
Dec 02 06:09:08.730 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 06:09:08.737 INFO [stderr] error: Could not compile `complex`.
Dec 02 06:09:08.737 INFO [stderr] 
Dec 02 06:09:08.737 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 06:09:08.739 INFO [stderr] su: No module specific data is present
Dec 02 06:09:09.112 INFO running `"docker" "inspect" "d5698d2cbe754a8bc6235fd3bb37608f848340b073744f64fcb33c2bb0d45bbd"`
Dec 02 06:09:09.237 INFO running `"docker" "rm" "-f" "d5698d2cbe754a8bc6235fd3bb37608f848340b073744f64fcb33c2bb0d45bbd"`
Dec 02 06:09:09.352 INFO [stdout] d5698d2cbe754a8bc6235fd3bb37608f848340b073744f64fcb33c2bb0d45bbd