From e6636be53a387967bdd2c55d64649e619c1edf54 Mon Sep 17 00:00:00 2001
From: Daniel Shaar <daniel@modal.com>
Date: Wed, 11 Dec 2024 21:28:51 +0000
Subject: [PATCH] Deprecate spawning generator functions.

---
 modal/functions.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modal/functions.py b/modal/functions.py
index 0aa63b1a2e..0b58ae8655 100644
--- a/modal/functions.py
+++ b/modal/functions.py
@@ -1275,6 +1275,10 @@ async def _call_generator(self, args, kwargs):
 
     @synchronizer.no_io_translation
     async def _call_generator_nowait(self, args, kwargs):
+        deprecation_warning(
+            (2024, 12, 11),
+            "Calling spawn on a generator function is deprecated and will soon be removed.",
+        )
         return await _Invocation.create(
             self,
             args,