[Dune] Installation problem

[Lars Diening]

Dear developers,

unfortunately I cannot use Dune anymore. (The last successful run is 
weeks ago, so I do not know when the error started to appear).

1) When I download the stable version Dune 2.4.1 I cannot use dune-pdelab,

ERROR: version mismatch.
        dune-pdelab requires dune-common >= 3.0,

2) When I use the git version of the following modules

dune-alugrid   dune-grid        dune-localfunctions  dune-typetree
dune-common    dune-grid-howto  dune-pdelab
dune-geometry  dune-istl        dune-pdelab-howto

and run "dune-common/bin/dunecontrol all" I also get an error:

-----------------------
Scanning dependencies of target dunecommon
[  7%] Building CXX object 
dune/common/CMakeFiles/dunecommon.dir/debugallocator.cc.o
[ 14%] Building CXX object 
dune/common/CMakeFiles/dunecommon.dir/dynmatrixev.cc.o
[ 21%] Building CXX object 
dune/common/CMakeFiles/dunecommon.dir/exceptions.cc.o
[ 28%] Building CXX object 
dune/common/CMakeFiles/dunecommon.dir/fmatrixev.cc.o
[ 35%] Building CXX object 
dune/common/CMakeFiles/dunecommon.dir/ios_state.cc.o
[ 42%] Building CXX object 
dune/common/CMakeFiles/dunecommon.dir/parametertree.cc.o
In file included from 
/home/diening/dune/dune-common/dune/common/fvector.hh:16:0,
                  from 
/home/diening/dune/dune-common/dune/common/parametertree.hh:26,
                  from 
/home/diening/dune/dune-common/dune/common/parametertree.cc:18:
/home/diening/dune/dune-common/dune/common/typetraits.hh:521:62: error: 
‘decay_t’ is not a member of ‘std’
    struct IsIntegralConstant : public 
Imp::IsIntegralConstant<std::decay_t<T>>
                                                               ^
/home/diening/dune/dune-common/dune/common/typetraits.hh:521:62: error: 
‘decay_t’ is not a member of ‘std’
/home/diening/dune/dune-common/dune/common/typetraits.hh:521:75: error: 
template argument 1 is invalid
    struct IsIntegralConstant : public 
Imp::IsIntegralConstant<std::decay_t<T>>
^
/home/diening/dune/dune-common/dune/common/typetraits.hh:521:76: error: 
expected ‘{’ before ‘>’ token
    struct IsIntegralConstant : public 
Imp::IsIntegralConstant<std::decay_t<T>>
^
/home/diening/dune/dune-common/dune/common/typetraits.hh:521:76: error: 
expected unqualified-id before ‘>’ token
make[2]: *** [dune/common/CMakeFiles/dunecommon.dir/parametertree.cc.o] 
Error 1
make[1]: *** [dune/common/CMakeFiles/dunecommon.dir/all] Error 2
make: *** [all] Error 2
--- Failed to build dune-common ---
Terminating dunecontrol due to previous errors!
-----------------------------

How can I resolve this problem?

Best wishes,

Lars

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