diff -r 000000000000 -r 6474c204b198 js/src/vm/ErrorObject-inl.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/vm/ErrorObject-inl.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef vm_ErrorObject_inl_h
+#define vm_ErrorObject_inl_h
+
+#include "vm/ErrorObject.h"
+
+#include "jscntxt.h"
+
+inline JSString *
+js::ErrorObject::fileName(JSContext *cx) const
+{
+    const HeapSlot &slot = getReservedSlotRef(FILENAME_SLOT);
+    return slot.isString() ? slot.toString() : cx->names().empty;
+}
+
+inline uint32_t
+js::ErrorObject::lineNumber() const
+{
+    const HeapSlot &slot = getReservedSlotRef(LINENUMBER_SLOT);
+    return slot.isInt32() ? slot.toInt32() : 0;
+}
+
+inline uint32_t
+js::ErrorObject::columnNumber() const
+{
+    const HeapSlot &slot = getReservedSlotRef(COLUMNNUMBER_SLOT);
+    return slot.isInt32() ? slot.toInt32() : 0;
+}
+
+inline JSString *
+js::ErrorObject::stack(JSContext *cx) const
+{
+    const HeapSlot &slot = getReservedSlotRef(STACK_SLOT);
+    if (slot.isString())
+        return slot.toString();
+    return cx->names().empty;
+}
+
+#endif /* vm_ErrorObject_inl_h */