DirectAccess in TestEm0 crashes with segfault when calculating brem->ComputeCrossSectionPerAtom (line 186 in DirectAccess.cc) I see this behavior both on Ubuntu 18.04 and macOS 10.13.6 However, running TestEm0 TestEm0.in works fine
Thanks for reporting the problem. It seems solved in development version ref-07 (31 July 2018). Fixe will appear in public Geant4 10.5 in November 2018.