.

wcfs/client/client_test.py

@@ -189,7 +189,7 @@ def test_wcfs_client_down_efault():
     at2 = t.commit()
     at3 = t.commit(zf2, {1:'β3', 2:'γ3'})
 
-    wconn = t.wc.connect(at1)
+    wconn = t.wc.connect(at1)   # XXX -> at3
     defer(wconn.close)
 
     fh1 = wconn.open(zf1._p_oid);  defer(fh1.close)

wcfs/client/wcfs.cpp

@@ -682,6 +682,11 @@ pair<FileH, error> _Conn::open(zodb::Oid foid) {
         return make_pair(nil, E(err));
     }
 
+    // XXX ensure f<foid> @ wconn.at exists?
+    // XXX else we get pins to non-exists state from wcfs.
+    //
+    // XXX -> better teach wcfs to reject "watch <foid> @at" for @at where foid did not existed.
+
 retry:
     FileH f; bool ok;
     tie(f, ok) = wconn._filehTab.get_(foid);