`asyncio.iscoroutinefunction` usage in integrations raises deprecation warning on 3.14

[cooperoptigrid]

How do you use Sentry?

Sentry Saas (sentry.io)

Version

2.58.0

Steps to Reproduce

On Python 3.14.4, asyncio.iscoroutinefunction is deprecated in favour of inspect.iscoroutinefunction.

https://github.com/python/cpython/blob/2fdccb3f88603cb72d311ca304ab7fcf9df12d00/Lib/asyncio/coroutines.py#L20-L27

This raises a warning when using FastAPI's integration, in both sentry_sdk/integrations/starlette.py and sentry_sdk/integrations/fastapi.py

I manually converted them to use inspect in my venvs site package and the warning disappeared as expected. I have not checked for all usage of asyncio.iscoroutinefunction.

Reproduction using pytest

# main.py
from fastapi import FastAPI
import sentry_sdk
from sentry_sdk.integrations.fastapi import FastApiIntegration

sentry_sdk.init(
    dsn="valid-dsn",
    integrations=[FastApiIntegration()],
)

app = FastAPI()

@app.get("/")
async def root():
    return {"message": "Hello World"}

# test_main.py
from main import app
from fastapi.testclient import TestClient

client = TestClient(app)

def test_app():
    response = client.get("/")
    assert response.status_code == 200

Package              Version
-------------------- ---------
annotated-doc        0.0.4
annotated-types      0.7.0
anyio                4.13.0
certifi              2026.2.25
click                8.3.2
dnspython            2.8.0
email-validator      2.3.0
fastapi              0.136.0
fastapi-cli          0.0.24
fastapi-cloud-cli    0.17.0
fastar               0.11.0
h11                  0.16.0
httpcore             1.0.9
httptools            0.7.1
httpx                0.28.1
idna                 3.11
iniconfig            2.3.0
jinja2               3.1.6
markdown-it-py       4.0.0
markupsafe           3.0.3
mdurl                0.1.2
packaging            26.1
pluggy               1.6.0
pydantic             2.13.1
pydantic-core        2.46.1
pydantic-extra-types 2.11.1
pydantic-settings    2.13.1
pygments             2.20.0
pytest               9.0.3
python-dotenv        1.2.2
python-multipart     0.0.26
pyyaml               6.0.3
rich                 15.0.0
rich-toolkit         0.19.7
rignore              0.7.6
sentry-sdk           2.58.0
shellingham          1.5.4
starlette            1.0.0
typer                0.24.1
typing-extensions    4.15.0
typing-inspection    0.4.2
urllib3              2.6.3
uvicorn              0.44.0
uvloop               0.22.1
watchfiles           1.1.1
websockets           16.0

Expected Result

No warnings when using integrations.

Actual Result

================================================== warnings summary ==================================================
.venv/lib/python3.14/site-packages/sentry_sdk/integrations/starlette.py:427
.venv/lib/python3.14/site-packages/sentry_sdk/integrations/starlette.py:427
.venv/lib/python3.14/site-packages/sentry_sdk/integrations/starlette.py:427
.venv/lib/python3.14/site-packages/sentry_sdk/integrations/starlette.py:427
  /home/cooper/scratch/sentry-python-repro/.venv/lib/python3.14/site-packages/sentry_sdk/integrations/starlette.py:427: DeprecationWarning: 'asyncio.iscoroutinefunction' is deprecated and slated for removal in Python 3.16; use inspect.iscoroutinefunction() instead
    return asyncio.iscoroutinefunction(obj) or (

.venv/lib/python3.14/site-packages/sentry_sdk/integrations/fastapi.py:76
  /home/cooper/scratch/sentry-python-repro/.venv/lib/python3.14/site-packages/sentry_sdk/integrations/fastapi.py:76: DeprecationWarning: 'asyncio.iscoroutinefunction' is deprecated and slated for removal in Python 3.16; use inspect.iscoroutinefunction() instead
    and not asyncio.iscoroutinefunction(dependant.call)

[linear-code]

PY-2378

[cooperoptigrid]

sentry-python/sentry_sdk/integrations/django/asgi.py

Lines 38 to 51 in 6ce096b

	# Python 3.12 deprecates asyncio.iscoroutinefunction() as an alias for
	# inspect.iscoroutinefunction(), whilst also removing the _is_coroutine marker.
	# The latter is replaced with the inspect.markcoroutinefunction decorator.
	# Until 3.12 is the minimum supported Python version, provide a shim.
	# This was copied from https://github.com/django/asgiref/blob/main/asgiref/sync.py
	if hasattr(inspect, "markcoroutinefunction"):
	iscoroutinefunction = inspect.iscoroutinefunction
	markcoroutinefunction = inspect.markcoroutinefunction
	else:
	iscoroutinefunction = asyncio.iscoroutinefunction # type: ignore[assignment]
	def markcoroutinefunction(func: "_F") -> "_F":
	func._is_coroutine = asyncio.coroutines._is_coroutine # type: ignore
	return func

Just noticed this in Django ASGI, probably worth using this approach to support pre-3.12 versions

[alexander-alderman-webb]

Thanks for the report @cooperoptigrid!

We're aware of the use of the deprecated asyncio.iscoroutinefunction.
Mirroring the patched library's approach as in the Django integration is a good approach.

[cooperoptigrid]

Auto-closed but that PR does the fix! misread contributing guidelines... lol