Test for swift_deallocUninitializedObject

test/embedded/closures-heap.swift

@@ -8,6 +8,10 @@
 // REQUIRES: optimized_stdlib
 // REQUIRES: swift_feature_Embedded
 
+
+
+func f() -> Bool? { return nil }
+
 public class MyClass {
   var handler: (()->())? = nil
   func foo() {
@@ -32,5 +36,12 @@ struct Main {
     o!.foo() // CHECK: capture local
     print(local == 43 ? "43" : "???") // CHECK: 43
     o = nil // CHECK: deinit
+
+    let closure = {
+         guard var b = f() else { print("success"); return }
+         let c = { b = true }
+         _ = (b, c)
+    }
+    closure()   // CHECK: success
   }
 }