From cc8ca939c0477a49fcce0554fa1743bd5c656a11 Mon Sep 17 00:00:00 2001
From: Michael H <michael@michaelhall.tech>
Date: Fri, 14 Feb 2025 08:23:11 -0500
Subject: [PATCH] Fix type for `run_coroutine_threadsafe` (#13498)

---
 stdlib/asyncio/tasks.pyi | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/stdlib/asyncio/tasks.pyi b/stdlib/asyncio/tasks.pyi
index a349e81d8..f6ee10991 100644
--- a/stdlib/asyncio/tasks.pyi
+++ b/stdlib/asyncio/tasks.pyi
@@ -79,6 +79,7 @@ if sys.version_info >= (3, 12):
     _FutureLike: TypeAlias = Future[_T] | Awaitable[_T]
 else:
     _FutureLike: TypeAlias = Future[_T] | Generator[Any, None, _T] | Awaitable[_T]
+
 _TaskYieldType: TypeAlias = Future[object] | None
 
 FIRST_COMPLETED = concurrent.futures.FIRST_COMPLETED
@@ -347,7 +348,8 @@ else:
         *coros_or_futures: _FutureLike[_T], loop: AbstractEventLoop | None = None, return_exceptions: bool
     ) -> Future[list[_T | BaseException]]: ...
 
-def run_coroutine_threadsafe(coro: _FutureLike[_T], loop: AbstractEventLoop) -> concurrent.futures.Future[_T]: ...
+# unlike some asyncio apis, This does strict runtime checking of actually being a coroutine, not of any future-like.
+def run_coroutine_threadsafe(coro: Coroutine[Any, Any, _T], loop: AbstractEventLoop) -> concurrent.futures.Future[_T]: ...
 
 if sys.version_info >= (3, 10):
     def shield(arg: _FutureLike[_T]) -> Future[_T]: ...