[Test] Add regression test.

rdar://125864434

Author: nate-chandler

test/Interpreter/rdar125864434.swift

@@ -0,0 +1,21 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-build-swift  %s -o %t/bin
+// RUN: %target-codesign %t/bin
+// RUN: %target-run %t/bin | %FileCheck %s
+
+// REQUIRES: executable_test
+
+protocol Boopable: ~Copyable {
+  func boop()
+}
+
+struct S: ~Copyable, Boopable {
+  func boop() { print("boop") }
+}
+
+func check(_ b: borrowing any Boopable & ~Copyable) {
+  b.boop()
+}
+
+// CHECK: boop
+check(S())