scala/scala — pull request #3215 by retronym (2013-12-03 12:43:38+00:00)
Title: SI-7373 Make the constructor of Vector non-public

The danger of:

new Vector(1, 2, 3).toString
java.lang.NullPointerException

and the "should have been private all along" argument
call for a break in the source compatibility policy here.