Dec 02 14:15:04.502 INFO testing tftp_server-0.0.2 against 1.30.1 for beta-1.31-5
Dec 02 14:15:04.502 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 14:15:04.954 INFO [stdout] 2ecff5d56f599180fdf7ee60180745819d006b502874b20e8b1f287a1ad6ab73
Dec 02 14:15:04.956 INFO running `"docker" "start" "-a" "2ecff5d56f599180fdf7ee60180745819d006b502874b20e8b1f287a1ad6ab73"`
Dec 02 14:15:06.739 INFO [stderr] usermod: no changes
Dec 02 14:15:06.907 INFO [stderr]    Compiling tftp_server v0.0.2 (/source)
Dec 02 14:15:08.883 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 14:15:08.883 INFO [stderr]  --> src/lib.rs:1:1
Dec 02 14:15:08.883 INFO [stderr]   |
Dec 02 14:15:08.883 INFO [stderr] 1 | #![feature(question_mark)]
Dec 02 14:15:08.883 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 14:15:08.883 INFO [stderr] 
Dec 02 14:15:08.899 INFO [stderr] error: aborting due to previous error
Dec 02 14:15:08.899 INFO [stderr] 
Dec 02 14:15:08.899 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 14:15:08.908 INFO [stderr] error: Could not compile `tftp_server`.
Dec 02 14:15:08.908 INFO [stderr] 
Dec 02 14:15:08.908 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 14:15:08.908 INFO [stderr] su: No module specific data is present
Dec 02 14:15:09.779 INFO running `"docker" "inspect" "2ecff5d56f599180fdf7ee60180745819d006b502874b20e8b1f287a1ad6ab73"`
Dec 02 14:15:10.077 INFO running `"docker" "rm" "-f" "2ecff5d56f599180fdf7ee60180745819d006b502874b20e8b1f287a1ad6ab73"`
Dec 02 14:15:10.387 INFO [stdout] 2ecff5d56f599180fdf7ee60180745819d006b502874b20e8b1f287a1ad6ab73