NPE when adding JAX-RS support

STEP: in #1 workspace create dynamic web project with targeted runtime AS 7.1, WITHOUT JAX-RS support and with service: import javax.ws.rs.GET; import javax.ws.rs.Path; @Path( "/ rest " ) public class A { @GET public void method() { } } STEP: in #2 workspace import the project and add JAX-RS support into it FAIL: NPE is thrown: java.lang.NullPointerException at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.javaProject(TypeHierarchy.java:1062) at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.exists(TypeHierarchy.java:339) at org.jboss.tools.ws.jaxrs.core.jdt.JdtUtils.resolveTypeHierarchy(JdtUtils.java:453) at org.jboss.tools.ws.jaxrs.core.jdt.JaxrsAnnotationsScanner.findApplicationTypes(JaxrsAnnotationsScanner.java:75) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedProcessor.preprocessApplicationChangesOnScopeAdditionOrChange(ResourceChangedProcessor.java:371) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedProcessor.processApplicationChangesOnScopeAdditionOrChange(ResourceChangedProcessor.java:345) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedProcessor.processEvent(ResourceChangedProcessor.java:177) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedProcessor.processEntireProject(ResourceChangedProcessor.java:109) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedProcessor.processAffectedResources(ResourceChangedProcessor.java:82) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedBuildJob.run(ResourceChangedBuildJob.java:67) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)