Include crashing test case

Author: CodaFi

validation-test/compiler_crashers/21815-swift-lowering-silgen-emitmanagedrvaluewithcleanup.swift

@@ -0,0 +1,12 @@
+// RUN: --crash %target-swift-frontend %s -parse
+
+// Distributed under the terms of the MIT license
+// Test case submitted to project by https://github.com/practicalswift (practicalswift)
+
+struct S<T> {
+    init(f: AutoreleasingUnsafeMutablePointer<T?> -> ()) {
+        var t: T?
+        f(&t)
+    }
+}
+