#256: Several dependent window iterators lead to an invalid precondition ----------------------+----------------------------------------------------- Reporter: lazzara | Owner: Olena Team Type: defect | Status: new Priority: critical | Milestone: Olena 2.1 Component: Milena | Version: 2.0 Keywords: | ----------------------+----------------------------------------------------- With the following code: {{{ #include <mln/core/image/image2d.hh> #include <mln/core/alias/neighb2d.hh> #include <mln/value/int_u8.hh> #include <mln/io/pgm/load.hh> #include <mln/debug/iota.hh> #include <mln/debug/println.hh> #include <mln/border/fill.hh> int main(int argc, char *argv[]) { using namespace mln; typedef image2d<value::int_u8> I; I ima(box2d(3, 3)); debug::iota(ima); mln_piter_(I) p(ima.domain()); mln_niter_(neighb2d) n(c4(), p); mln_niter_(neighb2d) n2(c4(), n); border::fill(ima, 0); debug::println(ima); for_all(p) { if (p != point2d(1,1)) continue; std::cout << "ima(p) = " << ima(p) << std::endl; for_all(n) { std::cout << " ima(n) = " << ima(n) << std::endl; for_all(n2) { std::cout << " ima(n2) = " << ima(n2) << std::endl; } } } } }}} ... fail with the following error: {{{ multiple_iterator: ../../mln/core/internal/site_relative_iterator_base.hh:193: const typename S::psite& mln::internal::site_relative_iterator_base<S, E, C>::subj_() [with S = mln::neighb<mln::window<mln::dpoint<mln::grid::square, short int> > >, E = mln::neighb_fwd_niter<mln::window<mln::dpoint<mln::grid::square, short int> > >, C = mln::point<mln::grid::square, short int>, typename S::psite = mln::point<mln::grid::square, short int>]: Assertion `(bool)(exact(this)->compute_p_() == p_)' failed. }}} -- Ticket URL: <https://trac.lrde.org/olena/ticket/256> Olena <http://olena.lrde.epita.fr> Olena, a software platform dedicated to image processing.