Bug in Field
Vector type fields give segfault during initialize. From the error messages it seems this is due to conversion of layout_m to shared_ptr in barefields (commit fix Mesh Issues) from normal ptr. To reproduce the problem try running TestField.cpp which previously used to work. Only vector type fields have this issue.
Also, it seems grad always gives 0 even for non-constant functions but I will fix this once I run it again with proper mesh spacing after the above problem is fixed... These two could be unrelated also.