From 60e6c6badfcbcbccc902994f4f32db6048f60d1f Mon Sep 17 00:00:00 2001
From: Tony Garnock-Jones <tonyg@leastfixedpoint.com>
Date: Thu, 19 Oct 2023 12:40:38 +0200
Subject: [PATCH] Avoid spurious "Invalid Preserves tag 0" message when server
 quits before sending anything

---
 syndicate-server/examples/dirty-consumer.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/syndicate-server/examples/dirty-consumer.rs b/syndicate-server/examples/dirty-consumer.rs
index e578439..7fda14a 100644
--- a/syndicate-server/examples/dirty-consumer.rs
+++ b/syndicate-server/examples/dirty-consumer.rs
@@ -58,7 +58,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     let mut buf = [0; 131072];
     let turn_size = {
-        stream.read(&mut buf)?;
+        let n = stream.read(&mut buf)?;
+        if n == 0 {
+            return Ok(());
+        }
         let mut src = BytesBinarySource::new(&buf);
         src.packed_iovalues().demand_next(false)?;
         src.index