BundleResourceInstaller.installBundle() throws IllegalAccessException

Exception in BundleResourceInstaller.installBundle() invoking getContent() on the RespositoryContent resource being installed. Problem occurs if the RespositoryContent implementation type is not of visibility "public" (even though the getContent() method itself is public):

java.lang.IllegalAccessException: Class org.apache.aries.subsystem.core.internal.BundleResourceInstaller can not access a member of class org.apache.aries.subsystem.itests.defect.AriesReflectionTest$PrivateRepositoryContent with modifiers "public"