GCC gets gcc_unreachable() when trying to lower firstprivate, lastprivate or reduction clauses in #pragma omp for clause. This is because, GCC doesn't check if it is in parallel context.
-- Summary: gcc reach gcc_unreachable() Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: kuba at et dot pl http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30538