Dec 03 02:57:35.009 INFO testing libmcs-0.1.0 against 1.30.1 for beta-1.31-5
Dec 03 02:57:35.009 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 03 02:57:35.249 INFO [stdout] a4cc109556f9c5e3ec627fe675e12df94749275c0ccbe6f48da2b83683806056
Dec 03 02:57:35.251 INFO running `"docker" "start" "-a" "a4cc109556f9c5e3ec627fe675e12df94749275c0ccbe6f48da2b83683806056"`
Dec 03 02:57:35.767 INFO [stderr] usermod: no changes
Dec 03 02:57:35.792 INFO [stderr]    Compiling libmcs v0.1.0 (/source)
Dec 03 02:57:36.307 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 02:57:36.307 INFO [stderr]   --> src/lib.rs:15:1
Dec 03 02:57:36.307 INFO [stderr]    |
Dec 03 02:57:36.307 INFO [stderr] 15 | #![feature(optin_builtin_traits)]
Dec 03 02:57:36.307 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 02:57:36.307 INFO [stderr] 
Dec 03 02:57:36.307 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 02:57:36.307 INFO [stderr]   --> src/lib.rs:16:1
Dec 03 02:57:36.307 INFO [stderr]    |
Dec 03 02:57:36.307 INFO [stderr] 16 | #![feature(const_fn)]
Dec 03 02:57:36.307 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
Dec 03 02:57:36.307 INFO [stderr] 
Dec 03 02:57:36.307 INFO [stderr] error: aborting due to 2 previous errors
Dec 03 02:57:36.307 INFO [stderr] 
Dec 03 02:57:36.307 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 02:57:36.309 INFO [stderr] error: Could not compile `libmcs`.
Dec 03 02:57:36.309 INFO [stderr] 
Dec 03 02:57:36.309 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 02:57:36.309 INFO [stderr] su: No module specific data is present
Dec 03 02:57:36.690 INFO running `"docker" "inspect" "a4cc109556f9c5e3ec627fe675e12df94749275c0ccbe6f48da2b83683806056"`
Dec 03 02:57:36.776 INFO running `"docker" "rm" "-f" "a4cc109556f9c5e3ec627fe675e12df94749275c0ccbe6f48da2b83683806056"`
Dec 03 02:57:36.897 INFO [stdout] a4cc109556f9c5e3ec627fe675e12df94749275c0ccbe6f48da2b83683806056
