Fixed an issue with :nth-child selectors embedded in :not() filters. Fixes jQuery bug #4156.

src/selector.js

@@ -422,7 +422,7 @@ var Expr = Sizzle.selectors = {
 					}
 					return false;
 				}
-			} else if ( Expr.match.POS.test( match[0] ) ) {
+			} else if ( Expr.match.POS.test( match[0] ) || Expr.match.CHILD.test( match[0] ) ) {
 				return true;
 			}
 			
@@ -519,6 +519,25 @@ var Expr = Sizzle.selectors = {
 		}
 	},
 	filter: {
+		PSEUDO: function(elem, match, i, array){
+			var name = match[1], filter = Expr.filters[ name ];
+
+			if ( filter ) {
+				return filter( elem, i, match, array );
+			} else if ( name === "contains" ) {
+				return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
+			} else if ( name === "not" ) {
+				var not = match[3];
+
+				for ( var i = 0, l = not.length; i < l; i++ ) {
+					if ( not[i] === elem ) {
+						return false;
+					}
+				}
+
+				return true;
+			}
+		},
 		CHILD: function(elem, match){
 			var type = match[1], node = elem;
 			switch (type) {
@@ -562,25 +581,6 @@ var Expr = Sizzle.selectors = {
 					}
 			}
 		},
-		PSEUDO: function(elem, match, i, array){
-			var name = match[1], filter = Expr.filters[ name ];
-
-			if ( filter ) {
-				return filter( elem, i, match, array );
-			} else if ( name === "contains" ) {
-				return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
-			} else if ( name === "not" ) {
-				var not = match[3];
-
-				for ( var i = 0, l = not.length; i < l; i++ ) {
-					if ( not[i] === elem ) {
-						return false;
-					}
-				}
-
-				return true;
-			}
-		},
 		ID: function(elem, match){
 			return elem.nodeType === 1 && elem.getAttribute("id") === match;
 		},

test/unit/selector.js

@@ -180,7 +180,7 @@ test("multiple", function() {
 });
 
 test("child and adjacent", function() {
-	expect(48);
+	expect(49);
 	t( "Child", "p > a", ["simon1","google","groups","mark","yahoo","simon"] );
 	t( "Child", "p> a", ["simon1","google","groups","mark","yahoo","simon"] );
 	t( "Child", "p >a", ["simon1","google","groups","mark","yahoo","simon"] );
@@ -211,6 +211,7 @@ test("child and adjacent", function() {
 	
 	t( "First Child", "p:first-child", ["firstp","sndp"] );
 	t( "Nth Child", "p:nth-child(1)", ["firstp","sndp"] );
+	t( "Not Nth Child", "p:not(:nth-child(1))", ["ap","en","sap","first"] );
 
 	// Verify that the child position isn't being cached improperly
 	jQuery("p:first-child").after("<div></div>");