 	
 	func pop() throws -> JSONValue {
 		guard stack.count > 0 else {
-			throw JSONError.SyntaxError("Malformed JSON string")
+			throw JSONError.SyntaxError(malformedJSONString)
 		}
 		return stack.removeLast()
 	}

			case jsonBackSlash:
				s.appendContentsOf("\\\\")
			case jsonQuoteDouble:
				s.appendContentsOf("\"")
			case jsonBackSpace:
				s.appendContentsOf("\\b")
			case jsonFormFeed:

				stack.append(ky)
				return ky
			default:
				throw JSONError.SyntaxError(malformedJSONString)
			}
		case let pair as KeyPair:
			guard pair.value == nil else {
				throw JSONError.SyntaxError(malformedJSONString)
			}
			pair.value = obj
			try pop()
			return try handlePop(pair)
		default:
			throw JSONError.SyntaxError(malformedJSONString)
		}
	}
	
