scala/scala — pull request #1704 by retronym (2012-12-04 15:10:17+00:00)
Title: Fix for rangepos crasher.

wrapClassTagUnapply was generating an unpositioned tree
which would crash under -Yrangepos. See SI-6338 / SI-6754

Review by @adriaanm (I've bumped this to a 2.10.0 blocker
after the reports or problems in the IDE with Akka.)