- putDirect(exec->propertyNames().length, jsNumber(exec, 1), DontDelete | ReadOnly | DontEnum); // ECMA 15.11.7.5
- putDirect(exec->propertyNames().prototype, nativeErrorPrototype, DontDelete | ReadOnly | DontEnum);
+ ASSERT(inherits(&s_info));
+
+ NativeErrorPrototype* prototype = new (exec) NativeErrorPrototype(exec, globalObject, prototypeStructure, nameAndMessage, this);
+
+ putDirect(exec->globalData(), exec->propertyNames().length, jsNumber(1), DontDelete | ReadOnly | DontEnum); // ECMA 15.11.7.5
+ putDirect(exec->globalData(), exec->propertyNames().prototype, prototype, DontDelete | ReadOnly | DontEnum);
+ m_errorStructure.set(exec->globalData(), this, ErrorInstance::createStructure(exec->globalData(), prototype));
+ ASSERT(m_errorStructure);
+ ASSERT(m_errorStructure->typeInfo().type() == ObjectType);