PrFTHitsChecker seg. faults in dd4hep dbg builds

See

https://lhcb-nightlies.web.cern.ch/nightly/lhcb-dd4hep/1213/Moore/x86_64_v2-centos7-gcc11+dd4hep-dbg/tests#RecoConf.hlt2_light_reco_pr_kf_without_UT_RICH_Calo_Muon_with_mcchecking

pure virtual method called
terminate called without an active exception
 *** Break *** abort

#15 0x00007fd0a15353d5 in std::terminate () at /build/dkonst/gcc-clang-2/build/contrib/gcc-11.1.0/src/gcc/11.1.0/libstdc++-v3/libsupc++/eh_terminate.cc:58
#16 0x00007fd0a1536143 in __cxxabiv1::__cxa_pure_virtual () at /build/dkonst/gcc-clang-2/build/contrib/gcc-11.1.0/src/gcc/11.1.0/libstdc++-v3/libsupc++/pure.cc:50
#17 0x00007fd07367745f in PrFTHitsChecker::operator() (this=this
entry=0x31259210, FThits=..., clusters=..., links=..., mchits=..., DeFT=...) at ../Pr/PrMCTools/src/PrFTHitsChecker.cpp:140

@decianm can you pass this on to whomever is responsible for this checker ?