[TDF] Cannot use Range before a Define with a string expression

#include <ROOT/TDataFrame.hxx>

using TDF = ROOT::Experimental::TDataFrame;

int main(){

   auto fileName = "ranges.root";

   auto treeName = "events";

   TDF d(treeName, fileName);

   auto d_0_30 = d.Range(0, 30)

                             .Define("b3", "b1 + b2")

   return 0;

}

/build/jenkins/workspace/root-nightly-v6-14-00-patches/BUILDTYPE/Release/COMPILER/gcc62/LABEL/slc6/build/include/ROOT/TDFInterface.hxx: In instantiation of ‘ROOT::Experimental::TDF::TInterface<Proxied, DataSource>::TInterfaceJittedDefine ROOT::Experimental::TDF::TInterface<Proxied, DataSource>::Define(std::string_view, std::string_view) [with Proxied = ROOT::Detail::TDF::TRange<ROOT::Detail::TDF::TLoopManager>; DataSource = void; ROOT::Experimental::TDF::TInterface<Proxied, DataSource>::TInterfaceJittedDefine = ROOT::Experimental::TDF::TInterface<ROOT::Detail::TDF::TRangeBase>; typename decltype (ROOT::Internal::TDF::UpcastNode(((ROOT::Experimental::TDF::TInterface<Proxied, DataSource>*)(void)0)->ROOT::Experimental::TDF::TInterface<Proxied, DataSource>::fProxiedPtr))::element_type = ROOT::Detail::TDF::TRangeBase; std::string_view = std::experimental::__ROOT::basic_string_view<char>]’:

range.cxx:15:42:   required from here

/build/jenkins/workspace/root-nightly-v6-14-00-patches/BUILDTYPE/Release/COMPILER/gcc62/LABEL/slc6/build/include/ROOT/TDFInterface.hxx:348:14: error: could not convert ‘newInterface’ from ‘ROOT::Experimental::TDF::TInterface<ROOT::Detail::TDF::TRange<ROOT::Detail::TDF::TLoopManager>, void>’ to ‘ROOT::Experimental::TDF::TInterface<ROOT::Detail::TDF::TRange<ROOT::Detail::TDF::TLoopManager>, void>::TInterfaceJittedDefine {aka ROOT::Experimental::TDF::TInterface<ROOT::Detail::TDF::TRangeBase>}’

       return newInterface;

              ^~~~~~~~~~~~