.

wcfs/client/wcfs.cpp

@@ -586,10 +586,16 @@ error _Conn::resync(zodb::Tid at) {
 
     wconn._atMu.RLock();
     xerr::Contextf E("%s: resync -> @%s", v(wconn), v(at));
-    wconn._atMu.RUnlock();
     etrace("");
 
-    // XXX _downErr -> E
+    wconn._filehMu.RLock();
+    err = wconn._downErr();
+    wconn._filehMu.RUnlock();
+    wconn._atMu.RUnlock();
+
+    if (err != nil)
+        return E(err);
+
     // XXX at ^ (increases)     -> rejected by wcfs     XXX or also precheck here?
 
     // wait for wcfs/head to be >= at.