From 2c7241c0996f81838f5b93fec266a760f2347b4f Mon Sep 17 00:00:00 2001
From: Jarrett Ye <jarrett.ye@outlook.com>
Date: Tue, 8 Jul 2025 20:36:21 +0800
Subject: [PATCH] Update rslib/src/scheduler/fsrs/simulator.rs

Co-authored-by: user1823 <92206575+user1823@users.noreply.github.com>
---
 rslib/src/scheduler/fsrs/simulator.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/rslib/src/scheduler/fsrs/simulator.rs b/rslib/src/scheduler/fsrs/simulator.rs
index 595f2a028..42810dd49 100644
--- a/rslib/src/scheduler/fsrs/simulator.rs
+++ b/rslib/src/scheduler/fsrs/simulator.rs
@@ -153,6 +153,7 @@ impl Collection {
             .filter_map(|c| {
                 let memory_state = match c.memory_state {
                     Some(state) => state,
+                    // cards that lack memory states after compute_memory_state have no FSRS items, implying a truncated or ignored revlog
                     None => fsrs
                         .memory_state_from_sm2(
                             c.ease_factor(),