https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103851
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Here is an even more reduced testcase: struct _Deque_base { long _M_map_size; int *_M_start; int *_M_finish; }; void morphologicalFilter1D() { #pragma omp parallel { struct _Deque_base vals[4]; } } ---- CUT --- The above testcase can be used with either the C or C++ front-ends now too. I would say the bug is in value-query.cc really for not checking the defining statement is non-null when it is looping through all of the ssa names.