Fixes #13976: Garbage input should not cause error in buildFragment. Close gh-1284

src/manipulation.js

@@ -379,7 +379,7 @@ jQuery.extend({
 					// Descend through wrappers to the right content
 					j = wrap[ 0 ];
 					while ( j-- ) {
-						tmp = tmp.firstChild;
+						tmp = tmp.lastChild;
 					}
 
 					// Support: QtWebKit

test/unit/core.js

@@ -1272,7 +1272,7 @@ test("jQuery.proxy", function(){
 });
 
 test("jQuery.parseHTML", function() {
-	expect( 17 );
+	expect( 18 );
 
 	var html, nodes;
 
@@ -1308,6 +1308,7 @@ test("jQuery.parseHTML", function() {
 	equal( jQuery.parseHTML("<span><span>").length, 1, "Incorrect html-strings should not break anything" );
 	equal( jQuery.parseHTML("<td><td>")[ 1 ].parentNode.nodeType, 11,
 		"parentNode should be documentFragment for wrapMap (variable in manipulation module) elements too" );
+	ok( jQuery.parseHTML("<#if><tr><p>This is a test.</p></tr><#/if>") || true, "Garbage input should not cause error" );
 });
 
 test("jQuery.parseJSON", function(){