Nov 01 16:44:19.201 INFO testing aacunningham/sudoku_ai_rust against beta-2018-10-30 for beta-1.31-1
Nov 01 16:44:19.201 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-1/worker-1/beta-2018-10-30:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/beta-1.31-1/beta-2018-10-30:/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 +beta-2018-10-30 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"`
Nov 01 16:44:19.495 INFO blam! 1e03b06663c3bdbe659d7fed6c60d9ec3b281b5ff622a7b1422b919a26058c72
Nov 01 16:44:19.511 INFO running `"docker" "start" "-a" "1e03b06663c3bdbe659d7fed6c60d9ec3b281b5ff622a7b1422b919a26058c72"`
Nov 01 16:44:20.660 INFO kablam! usermod: no changes
Nov 01 16:44:20.787 INFO kablam!    Compiling sudoku_ai v0.1.0 (/source)
Nov 01 16:44:21.127 INFO kablam! error[E0554]: #![feature] may not be used on the beta release channel
Nov 01 16:44:21.127 INFO kablam!  --> src/lib.rs:1:1
Nov 01 16:44:21.127 INFO kablam!   |
Nov 01 16:44:21.127 INFO kablam! 1 | #![feature(iterator_step_by)]
Nov 01 16:44:21.127 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 01 16:44:21.127 INFO kablam! 
Nov 01 16:44:21.127 INFO kablam! error: aborting due to previous error
Nov 01 16:44:21.127 INFO kablam! 
Nov 01 16:44:21.127 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Nov 01 16:44:21.135 INFO kablam! error: Could not compile `sudoku_ai`.
Nov 01 16:44:21.135 INFO kablam! 
Nov 01 16:44:21.135 INFO kablam! To learn more, run the command again with --verbose.
Nov 01 16:44:21.139 INFO kablam! su: No module specific data is present
Nov 01 16:44:21.848 INFO running `"docker" "rm" "-f" "1e03b06663c3bdbe659d7fed6c60d9ec3b281b5ff622a7b1422b919a26058c72"`
Nov 01 16:44:22.022 INFO blam! 1e03b06663c3bdbe659d7fed6c60d9ec3b281b5ff622a7b1422b919a26058c72
