I'm not sure if this is a ParaView, a VTK, or an XDMF issue. Anyhow, for a segfault it's probably always worth filing a bug. Steps to reproduce: * Open [mesh.xdmf](/uploads/03294831220e1cbe2a15123c963a5529/mesh.xdmf) [mesh.h5](/uploads/bf0bc7534c6ceb97c7c519d7f0a8a188/mesh.h5) with ParaView. * Choose `XDMF3 Reader` or `XDFM3 Reader (Top Level Partition)`. * Click `Apply`. * Behold `Segmentation fault (core dumped)`. Interestingly, when the same data is given as XML-XDMF [mesh-xml.xdmf](/uploads/3853fb99837d8fc6f5b6b454449fffbb/mesh-xml.xdmf), no such error occurs.