--- a/src/jdk/nashorn/internal/objects/NativeJSON.java	Fri Sep 20 20:55:43 2013 +0530
+++ b/src/jdk/nashorn/internal/objects/NativeJSON.java	Fri Sep 20 22:37:08 2013 +0530
@@ -162,22 +162,27 @@
 
         String gap;
 
-        if (space instanceof Number || space instanceof NativeNumber) {
-            int indent;
-            if (space instanceof NativeNumber) {
-                indent = ((NativeNumber)space).intValue();
-            } else {
-                indent = ((Number)space).intValue();
-            }
+        // modifiable 'space' - parameter is final
+        Object modSpace = space;
+        if (modSpace instanceof NativeNumber) {
+            modSpace = JSType.toNumber(JSType.toPrimitive(modSpace, Number.class));
+        } else if (modSpace instanceof NativeString) {
+            modSpace = JSType.toString(JSType.toPrimitive(modSpace, String.class));
+        }
 
-            final StringBuilder sb = new StringBuilder();
-            for (int i = 0; i < Math.min(10, indent); i++) {
-                sb.append(' ');
+        if (modSpace instanceof Number) {
+            int indent = Math.min(10, JSType.toInteger(modSpace));
+            if (indent < 1) {
+                gap = "";
+            } else {
+                final StringBuilder sb = new StringBuilder();
+                for (int i = 0; i < indent; i++) {
+                    sb.append(' ');
+                }
+                gap = sb.toString();
             }
-            gap = sb.toString();
-
-        } else if (space instanceof String || space instanceof ConsString || space instanceof NativeString) {
-            final String str = (space instanceof String) ? (String)space : space.toString();
+        } else if (modSpace instanceof String || modSpace instanceof ConsString) {
+            final String str = modSpace.toString();
             gap = str.substring(0, Math.min(10, str.length()));
         } else {
             gap = "";

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/script/basic/JDK-8025149.js	Fri Sep 20 22:37:08 2013 +0530
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8025149: JSON.stringify does not handle 'space' argument as per the spec.
+ *
+ * @test
+ * @run
+ */
+
+print(JSON.stringify({ foo : 23, bar: { x : 22} }, undefined ,new Number(Infinity)));
+
+print(JSON.stringify({ foo : 23, bar: { x : 22} }, undefined ,new Number(-Infinity)));
+
+try {
+    JSON.stringify({},[],
+    (n = new Number(0), n.valueOf = function() { throw ("inside n.valueOf") }, n));
+} catch (e) {
+    print(e);
+}
+
+try {
+    JSON.stringify({},[],
+    (s = new String(""), s.toString = function() { throw ("inside s.toString") }, s));
+} catch (e) {
+    print(e);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/script/basic/JDK-8025149.js.EXPECTED	Fri Sep 20 22:37:08 2013 +0530
@@ -0,0 +1,9 @@
+{
+          "foo": 23,
+          "bar": {
+                    "x": 22
+          }
+}
+{"foo":23,"bar":{"x":22}}
+inside n.valueOf
+inside s.toString