JAX-RS problems don't show up after target runtime is set

STEP: Create Dynamic Web Project with Target runtime: <None> STEP: Activate JAX-RS support Create code that would cause errors if a target runtime was set (e.g. create HttpMethod annotation without Target and Retention annotations; or create JAX-RS Activator without specifing ApplicationPath; or create more JAX-RS Activators in one project) and then set target runtime. STEP: Create annotation annotated with the @HttpMethod annotation without @Target and @Retention annotations. MyAnnotation.java import javax.ws.rs.HttpMethod; @HttpMethod(value= "GET" ) public @ interface MyAnnotation { } ASSERT: There are 3 errors (related to no target runtime): -HttpMethod cannot be resolved to a type -The attribute value is undefined for the annotation type HttpMethod -The import javax.ws cannot be resolved STEP: Set Target runtime (Select project, open its Properties, Targeted Runtimes, check runtime e.g. EAP 6.1) STEP: There are 2 errors (related to problems in code): -The HTTP Method should have a @Retention(RetentionPolicy.RUNTIME) annotation on its type. -The HTTP Method should have a @Target(ElementType.METHOD) annotation on its type. FAIL: There is no error.