ai beta regression

[est31]

ai version 0.1.0 test-regressed from stable to beta (full log):

Aug 15 11:41:04.003 INFO blam! ---- chromosome::tests::get_best_returns_last stdout ----
Aug 15 11:41:04.004 INFO blam! 	thread 'chromosome::tests::get_best_returns_last' panicked at 'assertion failed: `(left == right)`
Aug 15 11:41:04.004 INFO blam!   left: `[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]`,
Aug 15 11:41:04.004 INFO blam!  right: `[0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1]`', src/chromosome.rs:162:8
Aug 15 11:41:04.005 INFO blam! note: Run with `RUST_BACKTRACE=1` for a backtrace.
Aug 15 11:41:04.005 INFO blam! 

cc @naomijub

[alexcrichton]

Spurious failure