Use the original element/fragment as the last item to be appended to the...

Use the original element/fragment as the last item to be appended to the document instead of the first in order to prevent missing elements when appending to multiple elements. Fixes #8070.

src/manipulation.js

@@ -186,7 +186,7 @@ jQuery.fn.extend({
 	clone: function( dataAndEvents, deepDataAndEvents ) {
 		dataAndEvents = dataAndEvents == null ? true : dataAndEvents;
 		deepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;
-		
+
 		return this.map( function () {
 			return jQuery.clone( this, dataAndEvents, deepDataAndEvents );
 		});
@@ -311,12 +311,19 @@ jQuery.fn.extend({
 			if ( first ) {
 				table = table && jQuery.nodeName( first, "tr" );
 
-				for ( var i = 0, l = this.length; i < l; i++ ) {
+				for ( var i = 0, l = this.length, lastIndex = l - 1; i < l; i++ ) {
 					callback.call(
 						table ?
 							root(this[i], first) :
 							this[i],
-						i > 0 || results.cacheable || (this.length > 1 && i > 0) ?
+						// Make sure that we do not leak memory by inadvertently discarding
+						// the original fragment (which might have attached data) instead of
+						// using it; in addition, use the original fragment object for the last
+						// item instead of first because it can end up being emptied incorrectly
+						// in certain situations (Bug #8070).
+						// Fragments from the fragment cache must always be cloned and never used
+						// in place.
+						results.cacheable || (l > 1 && i < lastIndex) ?
 							jQuery.clone( fragment, true, true ) :
 							fragment
 					);
@@ -484,9 +491,9 @@ jQuery.each({
 
 jQuery.extend({
 	clone: function( elem, dataAndEvents, deepDataAndEvents ) {
-		var clone = elem.cloneNode(true), 
-				srcElements, 
-				destElements, 
+		var clone = elem.cloneNode(true),
+				srcElements,
+				destElements,
 				i;
 
 		if ( !jQuery.support.noCloneEvent && (elem.nodeType === 1 || elem.nodeType === 11) && !jQuery.isXMLDoc(elem) ) {

test/unit/manipulation.js

@@ -883,6 +883,19 @@ test("jQuery.clone() (#8017)", function() {
 	equals( main.childNodes.length, clone.childNodes.length, "Simple child length to ensure a large dom tree copies correctly" );
 });
 
+test("clone() (#8070)", function () {
+	expect(2);
+
+	jQuery('<select class="test8070"></select><select class="test8070"></select>').appendTo('#main');
+	var selects = jQuery('.test8070');
+	selects.append('<OPTION>1</OPTION><OPTION>2</OPTION>');
+
+	equals( selects[0].childNodes.length, 2, "First select got two nodes" );
+	equals( selects[1].childNodes.length, 2, "Second select got two nodes" );
+
+	selects.remove();
+});
+
 test("clone()", function() {
 	expect(37);
 	equals( 'This is a normal link: Yahoo', jQuery('#en').text(), 'Assert text for #en' );