.

src/prologue.js

Index: src/prologue.js
diff --git a/src/prologue.js b/src/prologue.js
index 56f9ed5b38fa576f0a2c563877e37114d1b9ab8e..981aeaf865be644ac1dea2fac75003d0c9f5de04 100644
--- a/src/prologue.js
+++ b/src/prologue.js
@@ -183,6 +183,7 @@ function PostNatives(utils) {
   // Whitelist of exports from normal natives to experimental natives and debug.
   var expose_list = [
     "ArrayToString",
+    "ErrorToString",
     "FunctionSourceString",
     "GetIterator",
     "GetMethod",
@@ -200,6 +201,11 @@ function PostNatives(utils) {
     "InnerArraySort",
     "InnerArrayToLocaleString",
     "IsNaN",
+    "MakeError",
+    "MakeRangeError",
+    "MakeReferenceError",
+    "MakeSyntaxError",
+    "MakeTypeError",
     "MathMax",
     "MathMin",
     "ObjectIsFrozen",