Dec 02 23:01:52.998 INFO testing pattern-3-0.5.0 against 1.30.1 for beta-1.31-5
Dec 02 23:01:52.998 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 23:01:53.409 INFO [stdout] 0eda99ede1ac5def3c58a8a5132be2d3c202391cbcde2fe3709d7b81af02a14f
Dec 02 23:01:53.409 INFO running `"docker" "start" "-a" "0eda99ede1ac5def3c58a8a5132be2d3c202391cbcde2fe3709d7b81af02a14f"`
Dec 02 23:01:54.568 INFO [stderr] usermod: no changes
Dec 02 23:01:54.670 INFO [stderr]    Compiling pattern-3 v0.5.0 (/source)
Dec 02 23:01:55.651 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 23:01:55.651 INFO [stderr]   --> src/lib.rs:1:1
Dec 02 23:01:55.651 INFO [stderr]    |
Dec 02 23:01:55.651 INFO [stderr] 1  | / #![feature(
Dec 02 23:01:55.651 INFO [stderr] 2  | |     specialization,
Dec 02 23:01:55.651 INFO [stderr] 3  | |     // used in two places:
Dec 02 23:01:55.651 INFO [stderr] 4  | |     //  1. to support using the same two-way algorithm for non-Ord slices
Dec 02 23:01:55.651 INFO [stderr] ...  |
Dec 02 23:01:55.651 INFO [stderr] 17 | |     // some useful library features
Dec 02 23:01:55.651 INFO [stderr] 18 | | )]
Dec 02 23:01:55.651 INFO [stderr]    | |__^
Dec 02 23:01:55.651 INFO [stderr] 
Dec 02 23:01:55.655 INFO [stderr] error: aborting due to previous error
Dec 02 23:01:55.655 INFO [stderr] 
Dec 02 23:01:55.655 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 23:01:55.661 INFO [stderr] error: Could not compile `pattern-3`.
Dec 02 23:01:55.661 INFO [stderr] 
Dec 02 23:01:55.661 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 23:01:55.662 INFO [stderr] su: No module specific data is present
Dec 02 23:01:56.233 INFO running `"docker" "inspect" "0eda99ede1ac5def3c58a8a5132be2d3c202391cbcde2fe3709d7b81af02a14f"`
Dec 02 23:01:56.365 INFO running `"docker" "rm" "-f" "0eda99ede1ac5def3c58a8a5132be2d3c202391cbcde2fe3709d7b81af02a14f"`
Dec 02 23:01:56.496 INFO [stdout] 0eda99ede1ac5def3c58a8a5132be2d3c202391cbcde2fe3709d7b81af02a14f