https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68063
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Is that the
#pragma omp parallel private (f)
{
f = false;
#pragma omp single
#pragma omp taskloop lastprivate (a, T<Q>::t, b, n)
part? That indeed sounds like a data race, there should be private (r) or
private (R::r) clause most likely on the taskloop.
