Reproduction steps:
1. Open the attached project(OC link)(8:30 AM).
- Editor will freeze compiling scripts on GeneratingConstants step.

Note:
- Editor doesn't freeze when lines 79-81 are commented in GMversus.cs script:
public List<uint> BadGuyList() {
return badGuySpawnList.ToList();
}

Reproduced with:
2017.1.0p2, 2017.2.0b4, 2017.3.0a1

Not reproducible with:
5.6.2p4