Nov 01 16:44:22.111 INFO testing aacunningham/sudoku_ai_rust against 1.30.0 for beta-1.31-1
Nov 01 16:44:22.112 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-1/worker-1/1.30.0:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/beta-1.31-1/1.30.0:/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 +1.30.0 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 16:44:22.477 INFO blam! db03007a486f67f52b67650b1b1c1d4fafe42e54c64c0957a7bd5aeaa2079f31
Nov 01 16:44:22.483 INFO running `"docker" "start" "-a" "db03007a486f67f52b67650b1b1c1d4fafe42e54c64c0957a7bd5aeaa2079f31"`
Nov 01 16:44:23.563 INFO kablam! usermod: no changes
Nov 01 16:44:23.619 INFO kablam!    Compiling sudoku_ai v0.1.0 (/source)
Nov 01 16:44:24.119 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Nov 01 16:44:24.119 INFO kablam!  --> src/lib.rs:1:1
Nov 01 16:44:24.119 INFO kablam!   |
Nov 01 16:44:24.119 INFO kablam! 1 | #![feature(iterator_step_by)]
Nov 01 16:44:24.119 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 01 16:44:24.119 INFO kablam! 
Nov 01 16:44:24.119 INFO kablam! error: aborting due to previous error
Nov 01 16:44:24.119 INFO kablam! 
Nov 01 16:44:24.119 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Nov 01 16:44:24.123 INFO kablam! error: Could not compile `sudoku_ai`.
Nov 01 16:44:24.123 INFO kablam! 
Nov 01 16:44:24.123 INFO kablam! To learn more, run the command again with --verbose.
Nov 01 16:44:24.128 INFO kablam! su: No module specific data is present
Nov 01 16:44:24.578 INFO running `"docker" "rm" "-f" "db03007a486f67f52b67650b1b1c1d4fafe42e54c64c0957a7bd5aeaa2079f31"`
Nov 01 16:44:24.727 INFO blam! db03007a486f67f52b67650b1b1c1d4fafe42e54c64c0957a7bd5aeaa2079f31
