---

yaml
---
r: 348702
b: refs/heads/master
c: 339e84d
h: refs/heads/master

Author: swift-ci

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: 2795f40f33231faef9297b93c444695aa313f647
+refs/heads/master: 339e84dae3a8b14fd84f9369f82a17c17f92a1d6
 refs/heads/master-next: 203b3026584ecad859eb328b2e12490099409cd5
 refs/tags/osx-passed: b6b74147ef8a386f532cf9357a1bde006e552c54
 refs/tags/swift-2.2-SNAPSHOT-2015-12-01-a: 6bb18e013c2284f2b45f5f84f2df2887dc0f7dea

trunk/test/stdlib/Runtime.swift.gyb

@@ -800,8 +800,14 @@ AvailabilityVersionsTestSuite.test("_stdlib_isOSVersionAtLeast") {
   expectTrue(isAtLeastOS(0, 1066, 0))
   expectTrue(isAtLeastOS(0, 0, 1066))
 
-  // 9999 is a special version that's always available
-  expectTrue(isAtLeastOS(9999, 0, 0))
+  // When using a runtime that's not part of the OS, 9999 is a special version
+  // that's always available. The _swift_classIsSwiftMask symbol is absent in OS
+  // libraries, so detect based on that.
+  let RTLD_DEFAULT = UnsafeMutableRawPointer(bitPattern: -2)
+  let _swift_classIsSwiftMaskPtr = dlsym(RTLD_DEFAULT, "_swift_classIsSwiftMask")
+  if _swift_classIsSwiftMaskPtr != nil {
+    expectTrue(isAtLeastOS(9999, 0, 0))
+  }
 #endif
 }