Commits

Joe Groff committed 82f6260c644
Runtime: Add ObjC weak referencing support to SwiftObject. We were missing -_tryRetain, -_isDeallocating, -allowsWeakReference and -retainWeakReference implementations on SwiftObject, so forming an ObjC weak reference to a pure Swift object always failed and produced a nil reference. Fixes rdar://problem/18637774. Swift SVN r22710