1 files changed, 2 insertions, 0 deletions
diff --git a/src/backup.c b/src/backup.c
index 2090b4978..5e9c974ae 100644
--- a/src/backup.c
+++ b/src/backup.c
@@ -619,8 +619,10 @@ int sqlite3_backup_finish(sqlite3_backup *p){
   }
   if( p->isAttached ){
     pp = sqlite3PagerBackupPtr(sqlite3BtreePager(p->pSrc));
+    assert( pp!=0 );
     while( *pp!=p ){
       pp = &(*pp)->pNext;
+      assert( pp!=0 );
     }
     *pp = p->pNext;
   }