Index: src/vtab.c
==================================================================
--- src/vtab.c
+++ src/vtab.c
@@ -303,16 +303,16 @@
 ** As a result, a sqlite3.pDisconnect cannot be accessed simultaneously 
 ** by multiple threads. It is thread-safe.
 */
 void sqlite3VtabUnlockList(sqlite3 *db){
   VTable *p = db->pDisconnect;
-  db->pDisconnect = 0;
 
   assert( sqlite3BtreeHoldsAllMutexes(db) );
   assert( sqlite3_mutex_held(db->mutex) );
 
   if( p ){
+    db->pDisconnect = 0;
     sqlite3ExpirePreparedStatements(db, 0);
     do {
       VTable *pNext = p->pNext;
       sqlite3VtabUnlock(p);
       p = pNext;