Dec 02 13:05:01.996 INFO testing trim_matches_exactly-0.1.0 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 13:05:01.996 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt 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 13:05:02.548 INFO [stdout] 460d0a7fa8e87aad8288433571614e37846f9c5362c706a7306695b51b6e664f
Dec 02 13:05:02.550 INFO running `"docker" "start" "-a" "460d0a7fa8e87aad8288433571614e37846f9c5362c706a7306695b51b6e664f"`
Dec 02 13:05:03.762 INFO [stderr] usermod: no changes
Dec 02 13:05:03.811 INFO [stderr]    Compiling trim_matches_exactly v0.1.0 (/source)
Dec 02 13:05:03.938 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 13:05:03.938 INFO [stderr]  --> src/lib.rs:6:1
Dec 02 13:05:03.938 INFO [stderr]   |
Dec 02 13:05:03.938 INFO [stderr] 6 | #![feature(pattern)]
Dec 02 13:05:03.938 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^
Dec 02 13:05:03.938 INFO [stderr] 
Dec 02 13:05:03.938 INFO [stderr] error: aborting due to previous error
Dec 02 13:05:03.938 INFO [stderr] 
Dec 02 13:05:03.938 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 13:05:03.938 INFO [stderr] error: Could not compile `trim_matches_exactly`.
Dec 02 13:05:03.938 INFO [stderr] 
Dec 02 13:05:03.938 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 13:05:03.938 INFO [stderr] su: No module specific data is present
Dec 02 13:05:04.892 INFO running `"docker" "inspect" "460d0a7fa8e87aad8288433571614e37846f9c5362c706a7306695b51b6e664f"`
Dec 02 13:05:05.183 INFO running `"docker" "rm" "-f" "460d0a7fa8e87aad8288433571614e37846f9c5362c706a7306695b51b6e664f"`
Dec 02 13:05:05.387 INFO [stdout] 460d0a7fa8e87aad8288433571614e37846f9c5362c706a7306695b51b6e664f