From ba35762af2a1c89e7d7c0f2b88068794a44c9765 Mon Sep 17 00:00:00 2001
From: i509VCB <git@i509.me>
Date: Wed, 20 Dec 2023 23:04:46 -0600
Subject: [PATCH] fix borrow error when scheduling future inside an executor's
 callback

---
 src/sources/futures.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/sources/futures.rs b/src/sources/futures.rs
index 0207dc87..3a56e005 100644
--- a/src/sources/futures.rs
+++ b/src/sources/futures.rs
@@ -329,6 +329,9 @@ impl<T> EventSource for Executor<T> {
                             _ => unreachable!(),
                         };
 
+                        // Drop the guard since the callback may register another future to the scheduler.
+                        drop(active_guard);
+
                         callback(result, &mut ());
                     }
                 }