Index: trunk/test/unit/org/openstreetmap/josm/io/OsmJsonReaderTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/io/OsmJsonReaderTest.java	(revision 17225)
+++ trunk/test/unit/org/openstreetmap/josm/io/OsmJsonReaderTest.java	(revision 17232)
@@ -236,4 +236,21 @@
         assertTrue(r.isTagged());
         assertEquals("route", r.get("type"));
+
+    }
+
+    /**
+     * Test a relation example without members.
+     * @throws Exception never
+     */
+    @Test
+    public void testEmptyRelation() throws Exception {
+        DataSet ds = parse("{\n" +
+                "  \"type\": \"relation\",\n" +
+                "  \"id\": 1,\n" +
+                "  \"tags\": {}\n" +
+                "}");
+        Relation r = ds.getRelations().iterator().next();
+        assertEquals(1, r.getUniqueId());
+        assertEquals(0, r.getMembersCount());
     }