Singleton registration of a Provider that does not have the @Path annotation fails. e.g. custom exception mappers or consumers/producers
I've defined a javax.ws.rs.core.Application, it's getSingletons method returns the custom exception mapper, consumers and producers.
This was working in resteasy 1.2.1.GA.

java.lang.RuntimeException: Class is not a root resource. It, or one of its interfaces must be annotated with @Path: x.y.service.rest.ApplicationExceptionMapper implements: javax.ws.rs.ext.ExceptionMapper
at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:104)
at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:83)
at org.jboss.resteasy.core.ResourceMethodRegistry.addSingletonResource(ResourceMethodRegistry.java:47)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.processApplication(ServletContainerDispatcher.java:152)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.init(ServletContainerDispatcher.java:90)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.init(HttpServletDispatcher.java:36)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:809)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:525)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)