Issues using ipdb in interactive mode

[Jackevansevo]

Following the example in the README: https://github.com/encode/starlette#example

If I install ipdb and set a breakpoint inside homepage() I get an exception when attempting to enter interactive mode.

from starlette.applications import Starlette
from starlette.responses import JSONResponse
from starlette.routing import Route


async def homepage(request):
    breakpoint()
    return JSONResponse({"hello": "world"})


routes = [Route("/", endpoint=homepage)]

app = Starlette(debug=True, routes=routes)

The below screen recording demostrates this behaviour

2023-04-22.17-16-50.mp4

Traceback (most recent call last):
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/uvicorn/protocols/http/h11_impl.py", line 429, in run_asgi
    result = await app(  # type: ignore[func-returns-value]
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/uvicorn/middleware/proxy_headers.py", line 78, in __call__
    return await self.app(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/starlette/applications.py", line 122, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/starlette/middleware/errors.py", line 184, in __call__
    raise exc
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/starlette/middleware/errors.py", line 162, in __call__
    await self.app(scope, receive, _send)
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/starlette/middleware/exceptions.py", line 79, in __call__
    raise exc
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/starlette/middleware/exceptions.py", line 68, in __call__
    await self.app(scope, receive, sender)
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/starlette/routing.py", line 718, in __call__
    await route.handle(scope, receive, send)
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/starlette/routing.py", line 276, in handle
    await self.app(scope, receive, send)
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/starlette/routing.py", line 66, in app
    response = await func(request)
               ^^^^^^^^^^^^^^^^^^^
  File "/home/jack/code/x/example.py", line 8, in homepage
    return JSONResponse({"hello": "world"})
           ^^^^^^^^^^^^
  File "/home/jack/code/x/example.py", line 8, in homepage
    return JSONResponse({"hello": "world"})
           ^^^^^^^^^^^^
  File "/home/jack/.pyenv/versions/3.11.2/lib/python3.11/bdb.py", line 90, in trace_dispatch
    return self.dispatch_line(frame)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jack/.pyenv/versions/3.11.2/lib/python3.11/bdb.py", line 114, in dispatch_line
    self.user_line(frame)
  File "/home/jack/.pyenv/versions/3.11.2/lib/python3.11/pdb.py", line 340, in user_line
    self.interaction(frame, None)
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/IPython/core/debugger.py", line 335, in interaction
    OldPdb.interaction(self, frame, traceback)
  File "/home/jack/.pyenv/versions/3.11.2/lib/python3.11/pdb.py", line 435, in interaction
    self._cmdloop()
  File "/home/jack/.pyenv/versions/3.11.2/lib/python3.11/pdb.py", line 400, in _cmdloop
    self.cmdloop()
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/IPython/terminal/debugger.py", line 140, in cmdloop
    stop = self.onecmd(line)
           ^^^^^^^^^^^^^^^^^
  File "/home/jack/.pyenv/versions/3.11.2/lib/python3.11/pdb.py", line 500, in onecmd
    return cmd.Cmd.onecmd(self, line)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jack/.pyenv/versions/3.11.2/lib/python3.11/cmd.py", line 217, in onecmd
    return func(arg)
           ^^^^^^^^^
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/IPython/terminal/debugger.py", line 153, in do_interact
    ipshell(
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/IPython/terminal/embed.py", line 245, in __call__
    self.mainloop(
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/IPython/terminal/embed.py", line 337, in mainloop
    self.interact()
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/IPython/terminal/interactiveshell.py", line 873, in interact
    code = self.prompt_for_code()
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/IPython/terminal/interactiveshell.py", line 812, in prompt_for_code
    text = self.pt_app.prompt(
           ^^^^^^^^^^^^^^^^^^^
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/prompt_toolkit/shortcuts/prompt.py", line 1035, in prompt
    return self.app.run(
           ^^^^^^^^^^^^^
  File "/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/prompt_toolkit/application/application.py", line 961, in run
    return loop.run_until_complete(coro)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jack/.pyenv/versions/3.11.2/lib/python3.11/asyncio/base_events.py", line 629, in run_until_complete
    self._check_running()
  File "/home/jack/.pyenv/versions/3.11.2/lib/python3.11/asyncio/base_events.py", line 588, in _check_running
    raise RuntimeError('This event loop is already running')
RuntimeError: This event loop is already running
/home/jack/code/x/.direnv/python-3.11.2/lib/python3.11/site-packages/uvicorn/protocols/http/h11_impl.py:-1: RuntimeWarning: coroutine 'Application.run_async' was never awaited
RuntimeWarning: Enable tracemalloc to get the object allocation traceback