From 03df1c6ed7de1c2f81587ac08ddce958d0d9dd41 Mon Sep 17 00:00:00 2001
From: DuProcess <273172371+DuProcess@users.noreply.github.com>
Date: Fri, 12 Jun 2026 13:33:55 -0400
Subject: [PATCH] Ignore stale Dosh snapshots

---
 src/bin/dosh-client.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/bin/dosh-client.rs b/src/bin/dosh-client.rs
index 98a8068..c8de101 100644
--- a/src/bin/dosh-client.rs
+++ b/src/bin/dosh-client.rs
@@ -725,6 +725,9 @@ struct FrameBuffer {
 impl FrameBuffer {
     fn accept(&mut self, frame: Frame, last_rendered_seq: &mut u64) -> Vec<Frame> {
         if frame.snapshot {
+            if frame.output_seq < *last_rendered_seq {
+                return Vec::new();
+            }
             self.pending.clear();
             *last_rendered_seq = frame.output_seq;
             return vec![frame];
@@ -939,4 +942,13 @@ mod tests {
         assert_eq!(last, 20);
         assert!(buffer.accept(test_frame(12, false), &mut last).is_empty());
     }
+
+    #[test]
+    fn frame_buffer_ignores_stale_snapshot() {
+        let mut buffer = FrameBuffer::default();
+        let mut last = 20;
+
+        assert!(buffer.accept(test_frame(19, true), &mut last).is_empty());
+        assert_eq!(last, 20);
+    }
 }