* throws a RuntimeException when retrieving the nth element.
     *
     * If the PeekingIterator is caching elements too aggressively,
     * it may throw the exception on the (n-1)th element (oops!).
     */

    /* Checks the case where the first element throws an exception. */

    List<Integer> list = emptyList();
    Iterator<Integer> iterator = peekingIterator(new ThrowsAtEndIterator<Integer>(list));

     * throws a RuntimeException when retrieving the nth element.
     *
     * If the PeekingIterator is caching elements too aggressively,
     * it may throw the exception on the (n-1)th element (oops!).
     */

    /* Checks the case where the first element throws an exception. */

    List<Integer> list = emptyList();
    Iterator<Integer> iterator = peekingIterator(new ThrowsAtEndIterator<Integer>(list));

But it will be handled by the `unicorn_exception_handler`.

So, you will receive a clean error, with an HTTP status code of `418` and a JSON content of:

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | Technical Details

You could also use `from starlette.requests import Request` and `from starlette.responses import JSONResponse`.

ここで、`/unicorns/yolo`をリクエストすると、*path operation*は`UnicornException`を`raise`します。

しかし、これは`unicorn_exception_handler`で処理されます。

そのため、HTTPステータスコードが`418`で、JSONの内容が以下のような明確なエラーを受け取ることになります:

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | 技術詳細

また、`from starlette.requests import Request`と`from starlette.responses import JSONResponse`を使用することもできます。

		empty(t, "TestReadFrom (2)", &b, s, make([]byte, len(testString)))
	}
}

type panicReader struct{ panic bool }

func (r panicReader) Read(p []byte) (int, error) {
	if r.panic {
		panic("oops")
	}
	return 0, io.EOF
}

// Make sure that an empty Buffer remains empty when
// it is "grown" before a Read that panics
func TestReadFromPanicReader(t *testing.T) {

@app.get("/request-validation/{param}/")
def route_with_request_validation_exception(param: int):
    pass  # pragma: no cover


@app.get("/server-error")
def route_with_server_error():
    raise RuntimeError("Oops!")


def test_override_http_exception():
    response = client.get("/http-exception")
    assert response.status_code == 200
    assert response.json() == {"exception": "http-exception"}

them and let vagrant reprovision them. Say you've hosed your precise VM:

----------------------------------------------------
vagrant ssh ubuntu-1604 -c 'sudo rm -rf /bin'; echo oops
----------------------------------------------------

All you've got to do to get another one is

----------------------------------------------

Но оно будет обработано `unicorn_exception_handler`.

Таким образом, вы получите чистую ошибку с кодом состояния HTTP `418` и содержимым JSON:

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | Технические детали

Также можно использовать `from starlette.requests import Request` и `from starlette.responses import JSONResponse`.

Aber diese wird von `unicorn_exception_handler` gehandhabt.

Sie erhalten also einen sauberen Fehler mit einem HTTP-Statuscode von `418` und dem JSON-Inhalt:

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | Technische Details

Sie könnten auch `from starlette.requests import Request` und `from starlette.responses import JSONResponse` verwenden.

Але вона буде оброблена функцією-обробником `unicorn_exception_handler`.

Отже, ви отримаєте зрозумілу помилку з кодом статусу HTTP `418` і JSON-вмістом:

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | Технічні деталі

Ви також можете використовувати `from starlette.requests import Request` і `from starlette.responses import JSONResponse`.