https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81758
--- Comment #16 from DIL <liakhdi at ornl dot gov> --- Hi Paul, Thanks for looking into this issue. I ran the debugger again. The vtab corruption occurs upon the first encounter in function VectorIterElement() in line 720 of gfc_vector.F90. Just to make sure, that line begins with: elem_p=>this%container%vec_tile(q(4))%... Before that line, the elem_p (cep) vtab looks fine. After that line it gets bad. Please let me know if you need more information from the debugger.