From b08c46545038f416224b58f97a8c4c2a318451e5 Mon Sep 17 00:00:00 2001
From: PThorpe92 <preston@turso.tech>
Date: Sun, 27 Jul 2025 21:51:50 -0400
Subject: [PATCH] Fix writing wal header for async IO

---
 core/storage/sqlite3_ondisk.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/storage/sqlite3_ondisk.rs b/core/storage/sqlite3_ondisk.rs
index 0e9b5b5aa..fbea32e24 100644
--- a/core/storage/sqlite3_ondisk.rs
+++ b/core/storage/sqlite3_ondisk.rs
@@ -1683,7 +1683,10 @@ pub fn begin_write_wal_header(io: &Arc<dyn File>, header: &WalHeader) -> Result<
         Arc::new(RefCell::new(buffer))
     };
 
+    let cloned = buffer.clone();
     let write_complete = move |bytes_written: i32| {
+        // make sure to reference buffer so it's alive for async IO
+        let _buf = cloned.borrow();
         turso_assert!(
             bytes_written == WAL_HEADER_SIZE as i32,
             "wal header wrote({bytes_written}) != expected({WAL_HEADER_SIZE})"