---

yaml
---
r: 346873
b: refs/heads/master
c: c266abc
h: refs/heads/master
i:
  346871: d66efac

Author: swift-ci

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: dceb4041b18c47764c6dbdf00ce49090eb048608
+refs/heads/master: c266abc65673816e5936e979af7233f382e2defb
 refs/heads/master-next: 203b3026584ecad859eb328b2e12490099409cd5
 refs/tags/osx-passed: b6b74147ef8a386f532cf9357a1bde006e552c54
 refs/tags/swift-2.2-SNAPSHOT-2015-12-01-a: 6bb18e013c2284f2b45f5f84f2df2887dc0f7dea

trunk/stdlib/public/core/Availability.swift

@@ -25,6 +25,9 @@ public func _stdlib_isOSVersionAtLeast(
   _ patch: Builtin.Word
 ) -> Builtin.Int1 {
 #if os(macOS) || os(iOS) || os(tvOS) || os(watchOS)
+  if Int(major) == 9999 {
+    return true._value
+  }
   // The call to _swift_stdlib_operatingSystemVersion is used as an indicator
   // that this function was called by a compiler optimization pass. If it is
   // replaced that pass needs to be updated.

trunk/test/stdlib/Runtime.swift.gyb

@@ -766,6 +766,9 @@ AvailabilityVersionsTestSuite.test("_stdlib_isOSVersionAtLeast") {
   expectFalse(isAtLeastOS(1066, 0, 0))
   expectTrue(isAtLeastOS(0, 1066, 0))
   expectTrue(isAtLeastOS(0, 0, 1066))
+  
+  // 9999 is a special version that's always available
+  expectTrue(isAtLeastOS(9999, 0, 0))
 #endif
 }