From 65f6223723f58dea3b249e5a9cca0ab9f43167f1 Mon Sep 17 00:00:00 2001
From: Jarrett Ye <jarrett.ye@outlook.com>
Date: Fri, 31 Oct 2025 10:18:45 +0800
Subject: [PATCH] Fix/FSRS short-term schedule doesn't work with default params

---
 rslib/src/scheduler/answering/mod.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rslib/src/scheduler/answering/mod.rs b/rslib/src/scheduler/answering/mod.rs
index 6ff8c6e2d..bf4808a67 100644
--- a/rslib/src/scheduler/answering/mod.rs
+++ b/rslib/src/scheduler/answering/mod.rs
@@ -488,6 +488,9 @@ impl Collection {
             let params = config.fsrs_params();
             if params.len() >= 19 {
                 params[17] > 0.0 && params[18] > 0.0
+            } else if params.is_empty() {
+                // fallback to true when using default params
+                true
             } else {
                 false
             }