Dec 02 06:31:19.044 INFO testing JosephFerano/rust_os against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 06:31:19.044 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-1/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt 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 06:31:19.407 INFO [stdout] 3199918ebdafb31ccf2f123f6dff2ccf6f4168b3459f238740a5f3db44b4aeb4
Dec 02 06:31:19.407 INFO running `"docker" "start" "-a" "3199918ebdafb31ccf2f123f6dff2ccf6f4168b3459f238740a5f3db44b4aeb4"`
Dec 02 06:31:20.101 INFO [stderr] usermod: no changes
Dec 02 06:31:20.136 INFO [stderr]    Compiling bitflags v1.0.4
Dec 02 06:31:20.136 INFO [stderr]    Compiling volatile v0.2.4
Dec 02 06:31:20.222 INFO [stderr]    Compiling multiboot2 v0.7.1
Dec 02 06:31:20.907 INFO [stderr]    Compiling first_os v0.1.0 (/source)
Dec 02 06:31:20.990 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 06:31:20.990 INFO [stderr]  --> src/lib.rs:1:1
Dec 02 06:31:20.990 INFO [stderr]   |
Dec 02 06:31:20.990 INFO [stderr] 1 | #![feature(lang_items)]
Dec 02 06:31:20.990 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 06:31:20.990 INFO [stderr] 
Dec 02 06:31:20.990 INFO [stderr] error: aborting due to previous error
Dec 02 06:31:20.990 INFO [stderr] 
Dec 02 06:31:20.990 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 06:31:20.995 INFO [stderr] error: Could not compile `first_os`.
Dec 02 06:31:20.995 INFO [stderr] 
Dec 02 06:31:20.995 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 06:31:20.996 INFO [stderr] su: No module specific data is present
Dec 02 06:31:21.291 INFO running `"docker" "inspect" "3199918ebdafb31ccf2f123f6dff2ccf6f4168b3459f238740a5f3db44b4aeb4"`
Dec 02 06:31:21.399 INFO running `"docker" "rm" "-f" "3199918ebdafb31ccf2f123f6dff2ccf6f4168b3459f238740a5f3db44b4aeb4"`
Dec 02 06:31:21.477 INFO [stdout] 3199918ebdafb31ccf2f123f6dff2ccf6f4168b3459f238740a5f3db44b4aeb4