From 8056138f860d3f5a88f7ead580e1efb026263da1 Mon Sep 17 00:00:00 2001
From: Jonathan Kelley <jkelleyrtp@gmail.com>
Date: Sat, 29 Jan 2022 10:27:40 -0500
Subject: [PATCH] fix: explicit default for event handler

rust derives default of T: Default, even when that's not a necessary requirement

This fixes that
---
 packages/core/src/nodes.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/nodes.rs b/packages/core/src/nodes.rs
index e30a07001..0efd64177 100644
--- a/packages/core/src/nodes.rs
+++ b/packages/core/src/nodes.rs
@@ -351,11 +351,18 @@ type ExternalListenerCallback<'bump, T> = BumpBox<'bump, dyn FnMut(T) + 'bump>;
 /// }
 ///
 /// ```
-#[derive(Default)]
 pub struct EventHandler<'bump, T = ()> {
     pub callback: RefCell<Option<ExternalListenerCallback<'bump, T>>>,
 }
 
+impl<'a> Default for EventHandler<'a> {
+    fn default() -> Self {
+        Self {
+            callback: RefCell::new(None),
+        }
+    }
+}
+
 impl<T> EventHandler<'_, T> {
     /// Call this event handler with the appropriate event type
     pub fn call(&self, event: T) {