If an error occurs while writing to the database file during a VACUUM, discard the contents of the in-memory cache. This is required as if the database is a zipvfs database, the contents of the cache may be inconsistent with respect to the database as stored on disk.

FossilOrigin-Name: 07159e84b40b01fa40cac5fad1f433888e5984f8

src/backup.c

@@ -704,6 +704,8 @@ int sqlite3BtreeCopyFile(Btree *pTo, Btree *pFrom){
   rc = sqlite3_backup_finish(&b);
   if( rc==SQLITE_OK ){
     pTo->pBt->pageSizeFixed = 0;
+  }else{
+    sqlite3PagerClearCache(sqlite3BtreePager(b.pDest));
   }
 
   assert( sqlite3BtreeIsInTrans(pTo)==0 );