Fix #13810: .replaceWith(nextSibling)

src/manipulation.js

@@ -173,6 +173,10 @@ jQuery.fn.extend({
 				parent = args[ i++ ];
 
 			if ( parent ) {
+				// Don't use the snapshot next if it has moved (#13810)
+				if ( next && next.parentNode !== parent ) {
+					next = this.nextSibling;
+				}
 				jQuery( this ).remove();
 				parent.insertBefore( elem, next );
 			}

test/unit/manipulation.js

@@ -879,7 +879,7 @@ test( "insertAfter(String|Element|Array<Element>|jQuery)", function() {
 function testReplaceWith( val ) {
 
 	var tmp, y, child, child2, set, non_existent, $div,
-		expected = 26;
+		expected = 29;
 
 	expect( expected );
 
@@ -955,6 +955,18 @@ function testReplaceWith( val ) {
 	equal( set[0].childNodes.length, 0, "No effect on a disconnected node." );
 
 
+	child = jQuery("#qunit-fixture").children().first();
+	$div = jQuery("<div class='pathological'/>").insertBefore( child );
+	$div.replaceWith( $div );
+	deepEqual( jQuery( ".pathological", "#qunit-fixture" ).get(), $div.get(),
+		"Self-replacement" );
+	$div.replaceWith( child );
+	deepEqual( jQuery("#qunit-fixture").children().first().get(), child.get(),
+		"Replacement with following sibling (#13810)" );
+	deepEqual( jQuery( ".pathological", "#qunit-fixture" ).get(), [],
+		"Replacement with following sibling (context removed)" );
+
+
 	non_existent = jQuery("#does-not-exist").replaceWith( val("<b>should not throw an error</b>") );
 	equal( non_existent.length, 0, "Length of non existent element." );