Fix writable/enumerable/configurable of undefined, NaN, & Infinity to be false

global_test.go

@@ -51,6 +51,15 @@ func TestGlobal(t *testing.T) {
 	test(`eval.length === 1`, "true")
 	test(`eval.prototype === undefined`, "true")
 	test(`raise: new eval()`, "TypeError: [function] is not a constructor")
+
+	test(`
+        [
+            [ delete undefined, undefined ],
+            [ delete NaN, NaN ],
+            [ delete Infinity, Infinity ],
+        ];
+    `, "false,,false,NaN,false,Infinity")
+
 }
 
 func TestGlobalLength(t *testing.T) {

inline

@@ -551,9 +551,9 @@ sub newContext {
                     "SyntaxError",
                     "URIError",
                 ),
-                $self->property("undefined", $self->undefinedValue(), "0101"),
-                $self->property("NaN", $self->numberValue("math.NaN()"), "0101"),
-                $self->property("Infinity", $self->numberValue("math.Inf(+1)"), "0100"),
+                $self->property("undefined", $self->undefinedValue(), "0"),
+                $self->property("NaN", $self->numberValue("math.NaN()"), "0"),
+                $self->property("Infinity", $self->numberValue("math.Inf(+1)"), "0"),
             ),
         }),
     ;

inline.go

@@ -4612,20 +4612,20 @@ func _newContext(runtime *_runtime) {
 				},
 			},
 			"undefined": _property{
-				mode: 0101,
+				mode: 0,
 				value: Value{
 					_valueType: valueUndefined,
 				},
 			},
 			"NaN": _property{
-				mode: 0101,
+				mode: 0,
 				value: Value{
 					_valueType: valueNumber,
 					value:      math.NaN(),
 				},
 			},
 			"Infinity": _property{
-				mode: 0100,
+				mode: 0,
 				value: Value{
 					_valueType: valueNumber,
 					value:      math.Inf(+1),

runtime_test.go

@@ -593,7 +593,7 @@ func TestComparison(t *testing.T) {
 	test := runTest()
 
 	test("undefined = 1")
-	test("undefined", "1")
+	test("undefined", "undefined")
 
 	test("result = undefined == undefined")
 	test("result", "true")