Dec 02 07:43:27.072 INFO testing Flecheck/Sudoku against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 07:43:27.072 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 07:43:27.635 INFO [stdout] c6c822d44ec3d13436123e59a8b9d06454517345751ead4c22e79ee10cef710c
Dec 02 07:43:27.637 INFO running `"docker" "start" "-a" "c6c822d44ec3d13436123e59a8b9d06454517345751ead4c22e79ee10cef710c"`
Dec 02 07:43:30.151 INFO [stderr] usermod: no changes
Dec 02 07:43:30.207 INFO [stderr]    Compiling indexmap v0.4.1
Dec 02 07:43:31.863 INFO [stderr]    Compiling priority-queue v0.5.1
Dec 02 07:43:32.747 INFO [stderr]    Compiling sudoku v0.1.0 (/source)
Dec 02 07:43:33.503 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 07:43:33.503 INFO [stderr]  --> src/main.rs:1:1
Dec 02 07:43:33.503 INFO [stderr]   |
Dec 02 07:43:33.503 INFO [stderr] 1 | #![feature(const_fn, nll)]
Dec 02 07:43:33.503 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 07:43:33.503 INFO [stderr] 
Dec 02 07:43:33.503 INFO [stderr] error: aborting due to previous error
Dec 02 07:43:33.503 INFO [stderr] 
Dec 02 07:43:33.503 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 07:43:33.515 INFO [stderr] error: Could not compile `sudoku`.
Dec 02 07:43:33.515 INFO [stderr] 
Dec 02 07:43:33.515 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 07:43:33.515 INFO [stderr] su: No module specific data is present
Dec 02 07:43:34.503 INFO running `"docker" "inspect" "c6c822d44ec3d13436123e59a8b9d06454517345751ead4c22e79ee10cef710c"`
Dec 02 07:43:34.829 INFO running `"docker" "rm" "-f" "c6c822d44ec3d13436123e59a8b9d06454517345751ead4c22e79ee10cef710c"`
Dec 02 07:43:35.115 INFO [stdout] c6c822d44ec3d13436123e59a8b9d06454517345751ead4c22e79ee10cef710c