From d4b328b0b01f39db6b8ef367c0857dcbedfa6b72 Mon Sep 17 00:00:00 2001
From: Jedrzej Kosinski <kosinkadink1@gmail.com>
Date: Mon, 5 Aug 2024 14:33:14 -0500
Subject: [PATCH] Fix NaiveReuse throwing error if no KFs attached

---
 animatediff/context_extras.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/animatediff/context_extras.py b/animatediff/context_extras.py
index 59438b5..a323a52 100644
--- a/animatediff/context_extras.py
+++ b/animatediff/context_extras.py
@@ -156,6 +156,8 @@ class NaiveReuseKeyframeGroup:
             keyframe.start_t = model.model_sampling.percent_to_sigma(keyframe.start_percent)
     
     def prepare_current_keyframe(self, t: Tensor):
+        if self.is_empty():
+            return
         curr_t: float = t[0]
         # if curr_t same as before, do nothing as step already accounted for
         if curr_t == self._previous_t: