.

wcfs/client/wcfs.cpp

@@ -338,6 +338,10 @@ pair<FileH, error> _Conn::open(zodb::Oid foid) {
         return make_pair(nil, E(fmt::errorf("wcfs bug: head/file size %% blksize != 0")));
 
     wconn._filehtab[foid] = f;
+    defer([&]() {
+        if (!allok)
+            wconn._filehtab.erase(foid);
+    });
 
     // start watching f
     string ack;
@@ -345,7 +349,6 @@ pair<FileH, error> _Conn::open(zodb::Oid foid) {
     if (err != nil)
         return make_pair(nil, E(err));
     if (ack != "ok") {
-        // XXX unregister f from _filehtab
         return make_pair(nil, fmt::errorf("watch: %s", v(ack)));
     }