From 3f660a5886b8face0d9bd117cb63be9ed0cfd6f2 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Thu, 5 Nov 2026 05:09:43 +0100
Subject: broken pushes refused

---
 src/swarm/sync.rs | 21 +++++++--------------
 1 file changed, 7 insertions(+), 14 deletions(-)

(limited to 'src/swarm/sync.rs')

diff --git a/src/swarm/sync.rs b/src/swarm/sync.rs
index 0f607e7..aea6a0b 100644
--- a/src/swarm/sync.rs
+++ b/src/swarm/sync.rs
@@ -471,8 +471,7 @@ pub(crate) async fn handle_sync(
     let writer = envelope.writer;
     let delivered = envelope.delivered;
     // Changes pushed along a tree (`SyncBody::Changes`): their heads and bytes, made
-    // into the Automerge message that would have brought them once the document's lock
-    // is held (`Received::pushed`).
+    // into the Automerge message that would have brought them (`Received::pushed`).
     let (payload, deflated, pushed) = match envelope.body {
         transport::SyncBody::Message(payload) => (payload, false, None),
         transport::SyncBody::Deflated(payload) => (payload, true, None),
@@ -537,12 +536,13 @@ pub(crate) async fn handle_sync(
             } else {
                 message
             };
-            let (payload_len, decoded) = match &pushed {
-                Some((_, _, len)) => (*len, None),
-                None => (
-                    message.0.len(),
-                    Some(crate::document::sync::decode(&message)?),
+            let (payload_len, message) = match pushed {
+                Some((heads, changes, len)) => (
+                    len,
+                    crate::document::sync::Received::pushed(heads, changes)
+                        .context("Pushed changes that don't decode")?,
                 ),
+                None => (message.0.len(), crate::document::sync::decode(&message)?),
             };
             stats.sync_received(payload_len);
             let mut replica = doc.blocking_write();
@@ -552,13 +552,6 @@ pub(crate) async fn handle_sync(
             if replica.epoch != epoch {
                 return Ok(None);
             }
-            let message = match decoded {
-                Some(message) => message,
-                None => {
-                    let (heads, changes, _) = pushed.expect("pushed or decoded");
-                    crate::document::sync::Received::pushed(heads, changes)
-                }
-            };
             let carried = message.carries_changes();
             let sizes = if carried { message.sizes() } else { (0, 0) };
             if carried {
-- 
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