Index: src/clone.c
==================================================================
--- src/clone.c
+++ src/clone.c
@@ -138,11 +138,11 @@
 
   if( g.argc < 4 ){
     usage("?OPTIONS? FILE-OR-URL NEW-REPOSITORY");
   }
   db_open_config(0);
-  if( file_size(g.argv[3])>0 ){
+  if( -1 != file_size(g.argv[3]) ){
     fossil_fatal("file already exists: %s", g.argv[3]);
   }
 
   url_parse(g.argv[2], urlFlags);
   if( zDefaultUser==0 && g.url.user!=0 ) zDefaultUser = g.url.user;

Index: src/db.c
==================================================================
--- src/db.c
+++ src/db.c
@@ -1682,10 +1682,15 @@
   verify_all_options();
 
   if( g.argc!=3 ){
     usage("REPOSITORY-NAME");
   }
+ 
+  if( -1 != file_size(g.argv[2]) ){
+    fossil_fatal("file already exists: %s", g.argv[2]);
+  }
+
   db_create_repository(g.argv[2]);
   db_open_repository(g.argv[2]);
   db_open_config(0);
   if( zTemplate ) db_attach(zTemplate, "settingSrc");
   db_begin_transaction();