From d67b324a7be084b01b14e511839b002f9d0f38be Mon Sep 17 00:00:00 2001
From: Matt Joiner <anacrolix@gmail.com>
Date: Fri, 18 Jul 2025 23:08:33 +1000
Subject: [PATCH] Fix panic when setting info bytes after Torrent closed

---
 torrent.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/torrent.go b/torrent.go
index 104733f9..c4ba4ecb 100644
--- a/torrent.go
+++ b/torrent.go
@@ -1827,6 +1827,10 @@ func (t *Torrent) bytesCompleted() int64 {
 func (t *Torrent) SetInfoBytes(b []byte) (err error) {
 	t.cl.lock()
 	defer t.cl.unlock()
+	err = t.getClosedErr()
+	if err != nil {
+		return
+	}
 	return t.setInfoBytesLocked(b)
 }
 
@@ -3521,3 +3525,10 @@ func (t *Torrent) wantReceiveChunk(reqIndex RequestIndex) bool {
 	}
 	return true
 }
+
+func (t *Torrent) getClosedErr() error {
+	if t.closed.IsSet() {
+		return errTorrentClosed
+	}
+	return nil
+}
-- 
2.51.0