Most tests were using %swift or similar substitutions, which did not
include the target triple and SDK. The driver was defaulting to the
host OS. Thus, we could not run the tests when the standard library was
not built for OS X.
Swift SVN r24504
We emit initializer expressions once for every init definition, which caused us to try to emit the same symbol for closure bodies in initializers multiple times. Fixes rdar://problem/17971234.
Swift SVN r21997