Is there a list somewhere of Swift compiler issues to avoid? Seems like "avoiding certain coding techniques" is what is currently necessary until Apple gets back on top of things...
One other example FWIW: having a largish array of Int arrays causes the compiler to either go into an endless loop or simply take too long, UNLESS the type of the array is specified.
var data = [[1,2,3],[4,5,6], ... ] // > 20 elements -> compiler hangs
as opposed to:
var data:[[Int]] = [[1,2,3],[4,5,6], ... ] // compiles quickly