When trying to run example 16 on a new installation of deal.II, I get the
error
Cycle 0
Number of active cells: 80
Number of degrees of freedom: 89 (by level: 8, 25, 89)
--------------------------------------------------------
An error occurred in line <1191> of file </opt/dealii/include/deal.II/grid/
tria_iterator.h> in function
dealii::TriaActiveIterator<Accessor>::TriaActiveIterator(const dealii::
TriaRawIterator<OtherAccessor>&) [with OtherAccessor = dealii::
DoFCellAccessor<dealii::DoFHandler<2, 2>, true>; Accessor = dealii::
DoFCellAccessor<dealii::DoFHandler<2, 2>, false>]
The violated condition was:
this->accessor.has_children() == false
Additional information:
(none)
Stacktrace:
-----------
#0 ./step-16:
dealii::TriaActiveIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, false>
>::TriaActiveIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true>
>(dealii::TriaRawIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&)
#1 ./step-16: std::_Function_handler<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, Step16::ScratchData<2>&, Step16::CopyData&),
Step16::LaplaceProblem<2>::assemble_multigrid()::{lambda(dealii::TriaActiveIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, false> > const&, Step16::ScratchData<2>&,
Step16::CopyData&)#1}>::_M_invoke(std::_Any_data const&,
dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, Step16::ScratchData<2>&, Step16::CopyData&)
#2 ./step-16: std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, Step16::ScratchData<2>&,
Step16::CopyData&)>::operator()(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > const&, Step16::ScratchData<2>&, Step16::CopyData&) const
#3 ./step-16:
dealii::MeshWorker::mesh_loop<dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> >, Step16::ScratchData<2>,
Step16::CopyData>(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > const&,
dealii::identity<dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > >::type const&, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, Step16::ScratchData<2>&, Step16::CopyData&)> >::type
const&, dealii::identity<std::function<void (Step16::CopyData const&)>
>::type const&, Step16::ScratchData<2> const&, Step16::CopyData const&,
dealii::MeshWorker::AssembleFlags, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, Step16::ScratchData<2>&, Step16::CopyData&)>
>::type const&, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, unsigned int,
dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, unsigned int, Step16::ScratchData<2>&,
Step16::CopyData&)> >::type const&, unsigned int, unsigned
int)::{lambda(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > const&, Step16::ScratchData<2>&,
Step16::CopyData&)#1}::operator()(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > const&, Step16::ScratchData<2>&, Step16::CopyData&) const
#4 ./step-16: void
dealii::WorkStream::run<dealii::MeshWorker::mesh_loop<dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> >, Step16::ScratchData<2>,
Step16::CopyData>(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > const&,
dealii::identity<dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > >::type const&, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, Step16::ScratchData<2>&, Step16::CopyData&)> >::type
const&, dealii::identity<std::function<void (Step16::CopyData const&)>
>::type const&, Step16::ScratchData<2> const&, Step16::CopyData const&,
dealii::MeshWorker::AssembleFlags, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, Step16::ScratchData<2>&, Step16::CopyData&)>
>::type const&, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, unsigned int,
dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, unsigned int, Step16::ScratchData<2>&,
Step16::CopyData&)> >::type const&, unsigned int, unsigned
int)::{lambda(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > const&, Step16::ScratchData<2>&, Step16::CopyData&)#1},
std::function<void (Step16::CopyData const&)>,
dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> >, Step16::ScratchData<2>,
Step16::CopyData>(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > const&,
dealii::identity<dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > >::type const&,
dealii::MeshWorker::mesh_loop<dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> >, Step16::ScratchData<2>,
Step16::CopyData>(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > const&,
dealii::identity<dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > >::type const&, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, Step16::ScratchData<2>&, Step16::CopyData&)> >::type
const&, dealii::identity<std::function<void (Step16::CopyData const&)>
>::type const&, Step16::ScratchData<2> const&, Step16::CopyData const&,
dealii::MeshWorker::AssembleFlags, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, Step16::ScratchData<2>&, Step16::CopyData&)>
>::type const&, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, unsigned int,
dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, unsigned int, Step16::ScratchData<2>&,
Step16::CopyData&)> >::type const&, unsigned int, unsigned
int)::{lambda(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > const&, Step16::ScratchData<2>&, Step16::CopyData&)#1},
std::function<void (Step16::CopyData const&)>, Step16::ScratchData<2>
const&, Step16::CopyData const&, unsigned int, unsigned int)
#5 ./step-16: void
dealii::MeshWorker::mesh_loop<dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> >, Step16::ScratchData<2>,
Step16::CopyData>(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > const&,
dealii::identity<dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2,
2>, true> > >::type const&, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, Step16::ScratchData<2>&, Step16::CopyData&)> >::type
const&, dealii::identity<std::function<void (Step16::CopyData const&)>
>::type const&, Step16::ScratchData<2> const&, Step16::CopyData const&,
dealii::MeshWorker::AssembleFlags, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, Step16::ScratchData<2>&, Step16::CopyData&)>
>::type const&, dealii::identity<std::function<void
(dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, unsigned int,
dealii::TriaIterator<dealii::DoFCellAccessor<dealii::DoFHandler<2, 2>,
true> > const&, unsigned int, unsigned int, Step16::ScratchData<2>&,
Step16::CopyData&)> >::type const&, unsigned int, unsigned int)
#6 ./step-16: Step16::LaplaceProblem<2>::assemble_multigrid()
#7 ./step-16: Step16::LaplaceProblem<2>::run()
#8 ./step-16: main
--------------------------------------------------------
Is there something wrong with my installation, or is there a bug in
deal.II? Step-16b works without problems
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