Dec 03 11:44:23.704 INFO testing flugrost-0.0.1 against 1.30.1 for beta-1.31-5
Dec 03 11:44:23.704 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 11:44:23.865 INFO [stdout] ec4c6ece57d1cf4e3b24cc617d55a9d7abf068110ec9defac2b58e93f7c7d081
Dec 03 11:44:23.868 INFO running `"docker" "start" "-a" "ec4c6ece57d1cf4e3b24cc617d55a9d7abf068110ec9defac2b58e93f7c7d081"`
Dec 03 11:44:24.459 INFO [stderr] usermod: no changes
Dec 03 11:44:24.519 INFO [stderr]    Compiling num-traits v0.2.6
Dec 03 11:44:24.519 INFO [stderr]    Compiling serde v1.0.80
Dec 03 11:44:24.519 INFO [stderr]    Compiling byteorder v1.2.7
Dec 03 11:44:28.847 INFO [stderr]    Compiling num-traits v0.1.43
Dec 03 11:44:29.603 INFO [stderr]    Compiling rmp v0.8.7
Dec 03 11:44:38.155 INFO [stderr]    Compiling rmp-serde v0.13.7
Dec 03 11:44:39.951 INFO [stderr]    Compiling flugrost v0.0.1 (/source)
Dec 03 11:44:40.911 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 11:44:40.911 INFO [stderr]  --> src/lib.rs:2:1
Dec 03 11:44:40.911 INFO [stderr]   |
Dec 03 11:44:40.911 INFO [stderr] 2 | #![feature(integer_atomics)]
Dec 03 11:44:40.911 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 11:44:40.911 INFO [stderr] 
Dec 03 11:44:40.911 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 11:44:40.911 INFO [stderr]  --> src/lib.rs:3:1
Dec 03 11:44:40.911 INFO [stderr]   |
Dec 03 11:44:40.911 INFO [stderr] 3 | #![feature(try_from)]
Dec 03 11:44:40.911 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
Dec 03 11:44:40.911 INFO [stderr] 
Dec 03 11:44:40.911 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 11:44:40.911 INFO [stderr]  --> src/lib.rs:4:1
Dec 03 11:44:40.911 INFO [stderr]   |
Dec 03 11:44:40.911 INFO [stderr] 4 | #![feature(vec_resize_default)]
Dec 03 11:44:40.911 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 11:44:40.911 INFO [stderr] 
Dec 03 11:44:40.911 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 11:44:40.911 INFO [stderr]  --> src/lib.rs:5:1
Dec 03 11:44:40.911 INFO [stderr]   |
Dec 03 11:44:40.911 INFO [stderr] 5 | #![feature(fn_traits)]
Dec 03 11:44:40.911 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
Dec 03 11:44:40.911 INFO [stderr] 
Dec 03 11:44:40.911 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 11:44:40.911 INFO [stderr]  --> src/lib.rs:6:1
Dec 03 11:44:40.911 INFO [stderr]   |
Dec 03 11:44:40.911 INFO [stderr] 6 | #![feature(read_initializer)]
Dec 03 11:44:40.911 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 11:44:40.911 INFO [stderr] 
Dec 03 11:44:40.911 INFO [stderr] error: aborting due to 5 previous errors
Dec 03 11:44:40.911 INFO [stderr] 
Dec 03 11:44:40.911 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 11:44:40.912 INFO [stderr] error: Could not compile `flugrost`.
Dec 03 11:44:40.912 INFO [stderr] 
Dec 03 11:44:40.912 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 11:44:40.915 INFO [stderr] su: No module specific data is present
Dec 03 11:44:42.216 INFO running `"docker" "inspect" "ec4c6ece57d1cf4e3b24cc617d55a9d7abf068110ec9defac2b58e93f7c7d081"`
Dec 03 11:44:42.539 INFO running `"docker" "rm" "-f" "ec4c6ece57d1cf4e3b24cc617d55a9d7abf068110ec9defac2b58e93f7c7d081"`
Dec 03 11:44:42.862 INFO [stdout] ec4c6ece57d1cf4e3b24cc617d55a9d7abf068110ec9defac2b58e93f7c7d081