https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85138
--- Comment #9 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
OK, so I am beginning to understand...
Part of the problem seems that, in check_pure_function,
else if (gfc_pure (NULL))
{
gfc_error ("Reference to impure function %qs at %L "
"within a PURE procedure", name, &e->where);
return false;
}
is checking the current namespace for PUREness; this seems not
to be initialized when gfc_reduce_init_expr (which in turn calls
gfc_resolve_expr) is called.
