Fixes #1260

RegExp object is no longer Function.
http://code.google.com/p/v8/issues/detail?id=617

lib/util.js

@@ -140,12 +140,13 @@ exports.inspect = function(obj, showHidden, depth, colors) {
 
     // Functions without properties can be shortcutted.
     if (typeof value === 'function' && keys.length === 0) {
-      if (isRegExp(value)) {
-        return stylize('' + value, 'regexp');
-      } else {
-        var name = value.name ? ': ' + value.name : '';
-        return stylize('[Function' + name + ']', 'special');
-      }
+      var name = value.name ? ': ' + value.name : '';
+      return stylize('[Function' + name + ']', 'special');
+    }
+
+    // RegExp without properties can be shortcutted
+    if (isRegExp(value) && keys.length === 0) {
+      return stylize('' + value, 'regexp');
     }
 
     // Dates without properties can be shortcutted
@@ -166,11 +167,16 @@ exports.inspect = function(obj, showHidden, depth, colors) {
     // Make functions say that they are functions
     if (typeof value === 'function') {
       var n = value.name ? ': ' + value.name : '';
-      base = (isRegExp(value)) ? ' ' + value : ' [Function' + n + ']';
+      base = ' [Function' + n + ']';
     } else {
       base = '';
     }
 
+    // Make RegExps say that they are RegExps
+    if (isRegExp(value)) {
+      base = ' ' + value;
+    }
+
     // Make dates with properties first say the date
     if (isDate(value)) {
       base = ' ' + value.toUTCString();
@@ -284,15 +290,15 @@ function isArray(ar) {
 
 
 function isRegExp(re) {
-  var s = '' + re;
   return re instanceof RegExp || // easy case
          // duck-type for context-switching evalcx case
-         typeof(re) === 'function' &&
+         typeof(re) === 'object' &&
+         re.constructor &&
          re.constructor.name === 'RegExp' &&
          re.compile &&
          re.test &&
          re.exec &&
-         s.match(/^\/.*\/[gim]{0,3}$/);
+         ('' + re).match(/^\/.*\/[gim]{0,3}$/);
 }