Sending more data after response is finished causes "thread panicked"

[nggit]

Hello,

The following case is tested on granian 2.5.5 (cpython 3.12.11, linux):

async def app(scope, receive, send):
    assert scope['type'] == 'http'

    await send({
        'type': 'http.response.start',
        'status': 200,
        'headers': [
            (b'content-type', b'text/plain'),
        ]
    })

    # body
    await send({
        'type': 'http.response.body',
        'body': b'Hello, ',
        'more_body': False
    })
    await send({
        'type': 'http.response.body',
        'body': b'World!'
    })

The response is correct, further messages are ignored... but it will also shut down.

[INFO] Starting granian (main PID: 21519)
[INFO] Listening at: http://127.0.0.1:9000
[INFO] Spawning worker-1 with PID: 21520
[WARNING] ASGI Lifespan errored, continuing without Lifespan support (to avoid Lifespan completely use "asginl" interface)
[INFO] Started worker-1
[INFO] Started worker-1 runtime-1

thread '<unnamed>' panicked at src/asgi/io.rs:222:93:

called Option::unwrap() on a None value
stack backtrace:
0: 0x7f8e94565282 -
1: 0x7f8e9449f213 -
2: 0x7f8e94564ddf -
3: 0x7f8e945650e3 -
4: 0x7f8e94564a8d -
5: 0x7f8e945904d5 -
6: 0x7f8e94590469 -
7: 0x7f8e9459111c -
8: 0x7f8e93e57f3f -
9: 0x7f8e93e5807b -
10: 0x7f8e93e58228 -
11: 0x7f8e94278f21 -
12: 0x7f8e94d7bca0 -
13: 0x7f8e94d7ac38 - PyObject_Vectorcall
14: 0x7f8e94c8b4d9 -
15: 0x7f8e94d9a07c -
16: 0x7f8e93ad4798 -
17: 0x7f8e93ad54ea -
18: 0x7f8e94d8d015 - _PyObject_Call
19: 0x7f8e92c34ce7 -
20: 0x7f8e92c3d66c -
21: 0x7f8e92c4a0bf -
22: 0x7f8e94d854d0 -
23: 0x7f8e94d7ac38 - PyObject_Vectorcall
24: 0x7f8e94c8b4d9 -
25: 0x7f8e94da6fee - PyObject_VectorcallMethod
26: 0x7f8e93e6dfe3 -
27: 0x7f8e94297b50 -
28: 0x7f8e942e60b8 -
29: 0x7f8e94d7bca0 -
30: 0x7f8e94d7ac38 - PyObject_Vectorcall
31: 0x7f8e94c8b4d9 -
32: 0x7f8e94d69adf - _PyObject_FastCallDictTstate
33: 0x7f8e94d898be - _PyObject_Call_Prepend
34: 0x7f8e94d896a0 -
35: 0x7f8e94d678cb -
36: 0x7f8e94d676ab - _PyObject_MakeTpCall
37: 0x7f8e94c8b4d9 -
38: 0x7f8e94d9df2d -
39: 0x7f8e94d8d14a -
40: 0x7f8e94c8bb17 -
41: 0x7f8e94d9df2d -
42: 0x7f8e94d8d14a -
43: 0x7f8e94c8bb17 -
44: 0x7f8e94d69b70 - _PyObject_FastCallDictTstate
45: 0x7f8e94d898be - _PyObject_Call_Prepend
46: 0x7f8e94e31350 -
47: 0x7f8e94d67744 - _PyObject_MakeTpCall
48: 0x7f8e94c8b4d9 -
49: 0x7f8e94de82d3 - PyEval_EvalCode
50: 0x7f8e94e24557 -
51: 0x7f8e94e1f78c -
52: 0x7f8e94e1c2a3 -
53: 0x7f8e94e1bda2 - _PyRun_SimpleFileObject
54: 0x7f8e94e1bae4 - _PyRun_AnyFileObject
55: 0x7f8e94e188a3 - Py_RunMain
56: 0x7f8e94dd1d57 - Py_BytesMain
57: 0x7f8e9529370a -
[ERROR] Unexpected exit from worker-1
[INFO] Shutting down granian

Thanks!