Dec 01 22:39:33.640 INFO testing brinchj/rust-sudoku-fun against 1.30.1 for beta-1.31-5
Dec 01 22:39:33.640 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 01 22:39:34.028 INFO [stdout] 624c2586fb5df017d95e32e381682fbaf2192d2de92a9396e54a28a31b334f24
Dec 01 22:39:34.035 INFO running `"docker" "start" "-a" "624c2586fb5df017d95e32e381682fbaf2192d2de92a9396e54a28a31b334f24"`
Dec 01 22:39:35.095 INFO [stderr] usermod: no changes
Dec 01 22:39:35.247 INFO [stderr]    Compiling debugtrace v0.1.0
Dec 01 22:39:35.259 INFO [stderr]    Compiling debug-builders v0.1.0
Dec 01 22:39:35.259 INFO [stderr]    Compiling either v0.1.7
Dec 01 22:39:35.259 INFO [stderr]    Compiling conv v0.3.3
Dec 01 22:39:37.371 INFO [stderr]    Compiling backtrace v0.1.8
Dec 01 22:39:40.008 INFO [stderr]    Compiling chomp v0.3.1
Dec 01 22:39:42.355 INFO [stderr]    Compiling sudokusolver v0.1.0 (/source)
Dec 01 22:39:43.855 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 01 22:39:43.855 INFO [stderr]  --> src/lib.rs:1:1
Dec 01 22:39:43.855 INFO [stderr]   |
Dec 01 22:39:43.855 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 01 22:39:43.855 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 22:39:43.855 INFO [stderr] 
Dec 01 22:39:43.855 INFO [stderr] error: aborting due to previous error
Dec 01 22:39:43.855 INFO [stderr] 
Dec 01 22:39:43.856 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 01 22:39:43.864 INFO [stderr] error: Could not compile `sudokusolver`.
Dec 01 22:39:43.864 INFO [stderr] 
Dec 01 22:39:43.864 INFO [stderr] To learn more, run the command again with --verbose.
Dec 01 22:39:43.866 INFO [stderr] su: No module specific data is present
Dec 01 22:39:44.847 INFO running `"docker" "inspect" "624c2586fb5df017d95e32e381682fbaf2192d2de92a9396e54a28a31b334f24"`
Dec 01 22:39:45.093 INFO running `"docker" "rm" "-f" "624c2586fb5df017d95e32e381682fbaf2192d2de92a9396e54a28a31b334f24"`
Dec 01 22:39:45.483 INFO [stdout] 624c2586fb5df017d95e32e381682fbaf2192d2de92a9396e54a28a31b334f24
