JAX-RS error message "Failed to analyse compilation unit methods" when editing method body

public class A {
	@Inject @Named("nobean") String s1;
    public int m() {
        return 0;  
    }
}

Java Model Exception: Java Model Status [[Working copy] A.java [in org.jboss.tools.example.html5.service [in src/main/java [in poh5]]] does not exist]
	at org.eclipse.jdt.internal.core.JavaElement.newJavaModelException(JavaElement.java:505)
	at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:246)
	at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:518)
	at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:255)
	at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:241)
	at org.eclipse.jdt.internal.core.JavaElement.getChildren(JavaElement.java:196)
	at org.eclipse.jdt.internal.core.JavaElement.getSourceElementAt(JavaElement.java:370)
	at org.eclipse.jdt.internal.core.CompilationUnit.getElementAt(CompilationUnit.java:701)
	at org.jboss.tools.ws.jaxrs.core.jdt.JavaMethodSignaturesVisitor.visit(JavaMethodSignaturesVisitor.java:73)
	at org.eclipse.jdt.core.dom.MethodDeclaration.accept0(MethodDeclaration.java:489)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2514)
	at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2585)
	at org.eclipse.jdt.core.dom.TypeDeclaration.accept0(TypeDeclaration.java:484)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2514)
	at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2585)
	at org.eclipse.jdt.core.dom.CompilationUnit.accept0(CompilationUnit.java:219)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2514)
	at org.jboss.tools.ws.jaxrs.core.jdt.CompilationUnitsRepository.mergeAST(CompilationUnitsRepository.java:116)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.JavaElementDeltaScanner.scanDelta(JavaElementDeltaScanner.java:118)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.JavaElementDeltaScanner.scanDelta(JavaElementDeltaScanner.java:152)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.JavaElementDeltaScanner.scanDelta(JavaElementDeltaScanner.java:152)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.JavaElementDeltaScanner.scanDelta(JavaElementDeltaScanner.java:152)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.JavaElementDeltaScanner.scanDelta(JavaElementDeltaScanner.java:152)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.JavaElementDeltaScanner.scanAndFilterEvent(JavaElementDeltaScanner.java:71)
	at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.JavaElementChangedBuildJob.run(JavaElementChangedBuildJob.java:51)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)