Possible memory corruption in cling about root

[devajithvs]

A stripped down version of the header that segfaults:

// test.h
#include "LoKi/Particles.h"

using EQUALTO = LoKi::EqualToValue<const LHCb::Particle*>;
const auto TRTYPE = LoKi::Particles::TrackType{};

// Remove ANY of the lines below and the segfault disappears.
const auto ISDOWN = EQUALTO{TRTYPE, LHCb::Track::Types::Downstream};
const auto ISLONG = EQUALTO{TRTYPE, LHCb::Track::Types::Long};
const auto MUONBDT_CATBOOST = LoKi::Particles::MuonMVA2{};
const auto ISMUONPID = LoKi::Particles::IsMuon{};
const auto ISMUONLOOSE = LoKi::Particles::IsMuonLoose{};
const auto ISMUONTIGHT = LoKi::Particles::IsMuonTight{};
const auto ISUP = EQUALTO{TRTYPE, LHCb::Track::Types::Upstream};
const auto KEY = LoKi::Particles::Key{};
const auto M = LoKi::Particles::Mass{};
const auto LV01 = LoKi::Particles::DecayAngle{1};
const auto LV02 = LoKi::Particles::DecayAngle{2};
const auto LV03 = LoKi::Particles::DecayAngle{3};
const auto LV04 = LoKi::Particles::DecayAngle{4};
const auto M0 = LoKi::Particles::Mass{};
const auto M1 = LoKi::Particles::InvariantMass{1};
const auto M12 = LoKi::Particles::InvariantMass{1, 2};
const auto M13 = LoKi::Particles::InvariantMass{1, 3};
const auto M14 = LoKi::Particles::InvariantMass{1, 4};
const auto M2 = LoKi::Particles::InvariantMass{2};
const auto M23 = LoKi::Particles::InvariantMass{2, 3};
const auto M24 = LoKi::Particles::InvariantMass{2, 4};
const auto M34 = LoKi::Particles::InvariantMass{3, 4};
const auto MM = LoKi::Particles::MeasuredMass{};