.

wcfs/internal/wcfs_virtmem.cpp

@@ -478,7 +478,7 @@ tuple</*rxq*/chan<rxPkt>, error> WatchLink::_sendReq(IContext *ctx, const string
 
     wlink->_txmu.lock(); // XXX -> atomic (currently uses arbitrary lock)
         StreamID stream = wlink->_req_next;
-        wlink->_req_next = (wlink->_req_next + 2) & ((1ULL<<64)-1);
+        wlink->_req_next = (wlink->_req_next + 2); // wrapped around at uint64 max
     wlink->_txmu.unlock();
 
     auto rxq = makechan<rxPkt>(1);