Fix #11291. Always clone XML docs with a genuine .cloneNode().

src/manipulation.js

@@ -24,7 +24,7 @@ var nodeNames = "abbr|article|aside|audio|bdi|canvas|data|datalist|details|figca
 	rhtml = /<|&#?\w+;/,
 	rnoInnerhtml = /<(?:script|style)/i,
 	rnocache = /<(?:script|object|embed|option|style)/i,
-	rnoshimcache = new RegExp("<(?:" + nodeNames + ")", "i"),
+    rnoshimcache = new RegExp("<(?:" + nodeNames + ")[\\s/>]", "i"),
 	// checked="checked" or checked
 	rchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,
 	rscriptType = /\/(java|ecma)script/i,
@@ -461,7 +461,7 @@ function cloneFixAttributes( src, dest ) {
 	// Event data gets referenced instead of copied if the expando
 	// gets copied too
 	dest.removeAttribute( jQuery.expando );
-	
+
 	// Clear flags for bubbling special change/submit events, they must
 	// be reattached when the newly cloned events are first activated
 	dest.removeAttribute( "_submit_attached" );
@@ -590,7 +590,7 @@ jQuery.extend({
 			destElements,
 			i,
 			// IE<=8 does not properly clone detached, unknown element nodes
-			clone = jQuery.support.html5Clone || !rnoshimcache.test( "<" + elem.nodeName ) ?
+			clone = jQuery.support.html5Clone || jQuery.isXMLDoc(elem) || !rnoshimcache.test( "<" + elem.nodeName + ">" ) ?
 				elem.cloneNode( true ) :
 				shimCloneNode( elem );
 

test/unit/manipulation.js

@@ -1218,6 +1218,16 @@ test("clone() on XML nodes", function() {
 });
 }
 
+test("clone() on local XML nodes with html5 nodename", function() {
+    expect(2);
+
+    var $xmlDoc = jQuery( jQuery.parseXML( "<root><meter /></root>" ) ),
+		$meter = $xmlDoc.find( "meter" ).clone();
+
+    equal( $meter[0].nodeName, "meter", "Check if nodeName was not changed due to cloning" );
+    equal( $meter[0].nodeType, 1, "Check if nodeType is not changed due to cloning" );
+} );
+
 test("html(undefined)", function() {
 	expect(1);
 	equal( jQuery("#foo").html("<i>test</i>").html(undefined).html().toLowerCase(), "<i>test</i>", ".html(undefined) is chainable (#5571)" );