Dear all,

I have errors when compiling my code with the devellpment version of 
deal.II .  The same problems occurs also with 9.0.0, the code works well 
with 9.0.0-pre. I  have no idea how to resolve these problems.

Michał 

/home/mwichro/lib/deal.II/include/deal.II/multigrid/multigrid.h:137:7: 
error: use of deleted function ‘dealii::mg::Signals::Signals(const 
dealii::mg::Signals&)’
/home/mwichro/lib/deal.II/include/deal.II/multigrid/multigrid.h:53:10: 
note: ‘dealii::mg::Signals::Signals(const dealii::mg::Signals&)’ is 
implicitly deleted because the default definition would be ill-formed:
   struct Signals
          ^
/home/mwichro/lib/deal.II/include/deal.II/multigrid/multigrid.h:53:10: 
error: use of deleted function 
‘boost::signals2::signal<void(bool)>::signal(const 
boost::signals2::signal<void(bool)>&)’
In file included from 
/home/mwichro/lib/deal.II/include/deal.II/bundled/boost/signals2/slot.hpp:21:0,
                 from 
/home/mwichro/lib/deal.II/include/deal.II/bundled/boost/signals2/connection.hpp:24,
                 from 
/home/mwichro/lib/deal.II/include/deal.II/bundled/boost/signals2/signal.hpp:22,
                 from 
/home/mwichro/lib/deal.II/include/deal.II/bundled/boost/signals2.hpp:19,
                 from 
/home/mwichro/lib/deal.II/include/deal.II/lac/solver.h:27,
                 from 
/home/mwichro/lib/deal.II/include/deal.II/lac/solver_cg.h:26,
                 from 
/home/mwichro/deal.II-projects/StokeMatrixFree/StokesMatrixFree.cc:8:
/home/mwichro/lib/deal.II/include/deal.II/bundled/boost/signals2/detail/signal_template.hpp:599:11:
 
note: ‘boost::signals2::signal<void(bool)>::signal(const 
boost::signals2::signal<void(bool)>&)’ is implicitly declared as deleted 
because ‘boost::signals2::signal<void(bool)>’ declares a move constructor 
or move assignment operator
     class BOOST_SIGNALS2_SIGNAL_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)
           ^
In file included from 
/home/mwichro/deal.II-projects/StokeMatrixFree/StokesMatrixFree.cc:34:0:
/home/mwichro/lib/deal.II/include/deal.II/multigrid/multigrid.h:53:10: 
error: use of deleted function 
‘boost::signals2::signal<void(bool)>::signal(const 
boost::signals2::signal<void(bool)>&)’
   struct Signals
          ^
/home/mwichro/lib/deal.II/include/deal.II/multigrid/multigrid.h:53:10: 
error: use of deleted function ‘boost::signals2::signal<void(bool, unsigned 
int)>::signal(const boost::signals2::signal<void(bool, unsigned int)>&)’
In file included from 
/home/mwichro/lib/deal.II/include/deal.II/bundled/boost/signals2/slot.hpp:21:0,
                 from 
/home/mwichro/lib/deal.II/include/deal.II/bundled/boost/signals2/connection.hpp:24,
                 from 
/home/mwichro/lib/deal.II/include/deal.II/bundled/boost/signals2/signal.hpp:22,
                 from 
/home/mwichro/lib/deal.II/include/deal.II/bundled/boost/signals2.hpp:19,
                 from 
/home/mwichro/lib/deal.II/include/deal.II/lac/solver.h:27,
                 from 
/home/mwichro/lib/deal.II/include/deal.II/lac/solver_cg.h:26,
                 from 
/home/mwichro/deal.II-projects/StokeMatrixFree/StokesMatrixFree.cc:8:
/home/mwichro/lib/deal.II/include/deal.II/bundled/boost/signals2/detail/signal_template.hpp:599:11:
 
note: ‘boost::signals2::signal<void(bool, unsigned int)>::signal(const 
boost::signals2::signal<void(bool, unsigned int)>&)’ is implicitly declared 
as deleted because ‘boost::signals2::signal<void(bool, unsigned int)>’ 
declares a move constructor or move assignment operator
     class BOOST_SIGNALS2_SIGNAL_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS)
           ^
In file included from 
/home/mwichro/deal.II-projects/StokeMatrixFree/StokesMatrixFree.cc:34:0:
/home/mwichro/lib/deal.II/include/deal.II/multigrid/multigrid.h:53:10: 
error: use of deleted function ‘boost::signals2::signal<void(bool, unsigned 
int)>::signal(const boost::signals2::signal<void(bool, unsigned int)>&)’
   struct Signals
          ^
/home/mwichro/lib/deal.II/include/deal.II/multigrid/multigrid.h:53:10: 
error: use of deleted function ‘boost::signals2::signal<void(bool, unsigned 
int)>::signal(const boost::signals2::signal<void(bool, unsigned int)>&)’
/home/mwichro/lib/deal.II/include/deal.II/multigrid/multigrid.h:53:10: 
error: use of deleted function ‘boost::signals2::signal<void(bool, unsigned 
int)>::signal(const boost::signals2::signal<void(bool, unsigned int)>&)’
/home/mwichro/lib/deal.II/include/deal.II/multigrid/multigrid.h:53:10: 
error: use of deleted function ‘boost::signals2::signal<void(bool, unsigned 
int)>::signal(const boost::signals2::signal<void(bool, unsigned int)>&)’

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