[Test] Adds a test case

Author: theblixguy

validation-test/compiler_crashers_2_fixed/sr11509.swift

@@ -0,0 +1,22 @@
+// RUN: %target-swift-frontend %s -typecheck -verify
+
+@propertyWrapper
+public struct Wrapper<Value> {
+  public init(someValue unused: Int) {
+    _ = unused
+  }
+  
+  public var wrappedValue: Value?
+}
+
+
+func functionScope() {
+  let scopedValue = 3 // expected-note {{'scopedValue' declared here}}
+  // expected-warning@-1 {{initialization of immutable value 'scopedValue' was never used; consider replacing with assignment to '_' or removing it}}
+  
+  enum StaticScope { // expected-note {{type declared here}}
+    @Wrapper(someValue: scopedValue) static var foo: String? // expected-error {{enum declaration cannot close over value 'scopedValue' defined in outer scope}}
+  }
+  
+  _ = StaticScope.foo
+}