List(phase name, id, description)
record(parser,1,parse source into ASTs, perform simple desugaring)
record(namer,2,resolve names, attach symbols to named trees)
record(packageobjects,3,load package objects)
record(typer,4,the meat and potatoes: type the trees)
record(superaccessors,5,add super accessors in traits and nested classes)
record(pickler,6,serialize symbol tables)
record(refchecks,7,reference/override checking, translate nested objects)
record(selectiveanf,8,)
record(liftcode,9,reify trees)