Dec 02 13:10:57.532 INFO testing transducers-0.0.2 against 1.30.1 for beta-1.31-5
Dec 02 13:10:57.532 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 13:10:57.949 INFO [stdout] 53a890cec1a513f8d09eac76618558ad765136c053d06c94f0bba75e396f74f7
Dec 02 13:10:57.959 INFO running `"docker" "start" "-a" "53a890cec1a513f8d09eac76618558ad765136c053d06c94f0bba75e396f74f7"`
Dec 02 13:10:59.406 INFO [stderr] usermod: no changes
Dec 02 13:10:59.471 INFO [stderr]    Compiling transducers v0.0.2 (/source)
Dec 02 13:11:00.287 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 13:11:00.287 INFO [stderr]   --> src/lib.rs:41:1
Dec 02 13:11:00.287 INFO [stderr]    |
Dec 02 13:11:00.287 INFO [stderr] 41 | #![feature(fn_traits, unboxed_closures)]
Dec 02 13:11:00.287 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 13:11:00.287 INFO [stderr] 
Dec 02 13:11:00.287 INFO [stderr] error: aborting due to previous error
Dec 02 13:11:00.287 INFO [stderr] 
Dec 02 13:11:00.287 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 13:11:00.296 INFO [stderr] error: Could not compile `transducers`.
Dec 02 13:11:00.296 INFO [stderr] 
Dec 02 13:11:00.296 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 13:11:00.297 INFO [stderr] su: No module specific data is present
Dec 02 13:11:01.041 INFO running `"docker" "inspect" "53a890cec1a513f8d09eac76618558ad765136c053d06c94f0bba75e396f74f7"`
Dec 02 13:11:01.347 INFO running `"docker" "rm" "-f" "53a890cec1a513f8d09eac76618558ad765136c053d06c94f0bba75e396f74f7"`
Dec 02 13:11:01.663 INFO [stdout] 53a890cec1a513f8d09eac76618558ad765136c053d06c94f0bba75e396f74f7