From 24ba319e702fa37ff089ae29d9d453b64e9beffd Mon Sep 17 00:00:00 2001
From: Jong Wook Kim <jongwook@openai.com>
Date: Tue, 14 Mar 2023 12:44:54 -0700
Subject: [PATCH] abort find_alignment on empty input

---
 whisper/timing.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/whisper/timing.py b/whisper/timing.py
index 1f8f4cf..f5d07e5 100644
--- a/whisper/timing.py
+++ b/whisper/timing.py
@@ -170,6 +170,9 @@ def find_alignment(
     medfilt_width: int = 7,
     qk_scale: float = 1.0,
 ) -> List[WordTiming]:
+    if len(text_tokens) == 0:
+        return []
+
     tokens = torch.tensor(
         [
             *tokenizer.sot_sequence,