Dec 02 18:08:56.784 INFO testing rx-0.0.1 against 1.30.1 for beta-1.31-5
Dec 02 18:08:56.784 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/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 18:08:57.139 INFO [stdout] 2d399957512181fa627d286f9f8f08936c80cc7ff1dc0677c9ff98f778882e89
Dec 02 18:08:57.139 INFO running `"docker" "start" "-a" "2d399957512181fa627d286f9f8f08936c80cc7ff1dc0677c9ff98f778882e89"`
Dec 02 18:08:58.191 INFO [stderr] usermod: no changes
Dec 02 18:08:58.255 INFO [stderr]    Compiling rx v0.0.1 (/source)
Dec 02 18:08:58.903 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 18:08:58.903 INFO [stderr]   --> src/lib.rs:16:1
Dec 02 18:08:58.903 INFO [stderr]    |
Dec 02 18:08:58.903 INFO [stderr] 16 | #![feature(fn_traits, unboxed_closures)]
Dec 02 18:08:58.903 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 18:08:58.903 INFO [stderr] 
Dec 02 18:08:58.903 INFO [stderr] error: aborting due to previous error
Dec 02 18:08:58.903 INFO [stderr] 
Dec 02 18:08:58.903 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 18:08:58.923 INFO [stderr] error: Could not compile `rx`.
Dec 02 18:08:58.923 INFO [stderr] 
Dec 02 18:08:58.923 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 18:08:58.923 INFO [stderr] su: No module specific data is present
Dec 02 18:08:59.411 INFO running `"docker" "inspect" "2d399957512181fa627d286f9f8f08936c80cc7ff1dc0677c9ff98f778882e89"`
Dec 02 18:08:59.673 INFO running `"docker" "rm" "-f" "2d399957512181fa627d286f9f8f08936c80cc7ff1dc0677c9ff98f778882e89"`
Dec 02 18:09:00.094 INFO [stdout] 2d399957512181fa627d286f9f8f08936c80cc7ff1dc0677c9ff98f778882e89