Index: trunk/test/unit/org/openstreetmap/josm/data/validation/tests/UnclosedWaysTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/data/validation/tests/UnclosedWaysTest.java	(revision 15135)
+++ trunk/test/unit/org/openstreetmap/josm/data/validation/tests/UnclosedWaysTest.java	(revision 15136)
@@ -15,4 +15,6 @@
 import org.openstreetmap.josm.data.osm.Node;
 import org.openstreetmap.josm.data.osm.OsmUtils;
+import org.openstreetmap.josm.data.osm.Relation;
+import org.openstreetmap.josm.data.osm.RelationMember;
 import org.openstreetmap.josm.data.osm.Way;
 import org.openstreetmap.josm.gui.mappaint.ElemStyles;
@@ -76,3 +78,26 @@
     }
 
+    /**
+     * Test to make sure the multipolygon ways are ignored
+     * @throws Exception if an exception occurs
+     */
+    @Test
+    public void testWayInMultiPolygon() throws Exception {
+        UnclosedWays uwTest = new UnclosedWays();
+        uwTest.initialize();
+        uwTest.startTest(null);
+        DataSet ds = new DataSet();
+
+        // Erroneous tag
+        Way w = createUnclosedWay("natural=water", ds);
+        Relation r = (Relation) OsmUtils.createPrimitive("relation type=multipolygon natural=wood");
+        r.addMember(new RelationMember("inner", w));
+        ds.addPrimitive(r);
+        uwTest.visit(w);
+        assertTrue(ElemStyles.hasAreaElemStyle(w, false));
+        assertEquals(0, uwTest.getErrors().size());
+
+        uwTest.endTest();
+    }
+
  }