From 0429ebcb733cdddc8a0774beb481941856e2cce7 Mon Sep 17 00:00:00 2001
From: James Hilliard <james.hilliard1@gmail.com>
Date: Thu, 21 Mar 2024 12:06:00 -0600
Subject: [PATCH] Raise exception if exec_coro is done.

---
 asgiref/sync.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/asgiref/sync.py b/asgiref/sync.py
index f263a432..4427fc2a 100644
--- a/asgiref/sync.py
+++ b/asgiref/sync.py
@@ -478,6 +478,8 @@ async def __call__(self, *args: _P.args, **kwargs: _P.kwargs) -> _R:
                     pass
             except IndexError:
                 pass
+            if exec_coro.done():
+                raise
             if cancel_parent:
                 exec_coro.cancel()
             ret = await exec_coro