Local functions may reference each other as long as they don't transitively capture any vars or other non-function local decls before their declaration.
Swift SVN r28394
This location is used when deciding whether a capture has already been
initialized, and without it the compiler decides that the reference to
a name from the capture list should be rejected.
rdar://problem/19776255&20153574
Swift SVN r26103
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
