The ctor should check which is seqence or not.

include/boost/fusion/container/vector/detail/vector_n.hpp

@@ -208,6 +208,7 @@ FUSION_HASH endif
         BOOST_FUSION_GPU_ENABLED
         BOOST_PP_CAT(vector, N)(
             Sequence const& seq
+          , typename boost::enable_if<traits::is_sequence<Sequence> >::type* = 0
 #if (N == 1)
           , typename boost::disable_if<is_convertible<Sequence, T0> >::type* /*dummy*/ = 0
 #endif
@@ -218,6 +219,7 @@ FUSION_HASH endif
         BOOST_FUSION_GPU_ENABLED
         BOOST_PP_CAT(vector, N)(
             Sequence& seq
+          , typename boost::enable_if<traits::is_sequence<Sequence> >::type* = 0
 #if (N == 1)
           , typename boost::disable_if<is_convertible<Sequence, T0> >::type* /*dummy*/ = 0
 #endif

include/boost/fusion/container/vector/vector.hpp

@@ -11,6 +11,7 @@
 #include <boost/preprocessor/repetition/enum_params.hpp>
 #include <boost/preprocessor/repetition/enum_binary_params.hpp>
 #include <boost/fusion/support/config.hpp>
+#include <boost/fusion/support/is_sequence.hpp>
 #include <boost/fusion/container/vector/vector_fwd.hpp>
 #include <boost/fusion/container/vector/detail/vector_n_chooser.hpp>
 #include <boost/fusion/sequence/intrinsic/begin.hpp>
@@ -20,6 +21,7 @@
 #include <boost/type_traits/add_const.hpp>
 #include <boost/type_traits/is_base_of.hpp>
 #include <boost/detail/workaround.hpp>
+#include <boost/core/enable_if.hpp>
 
 #define FUSION_HASH #
 
@@ -115,7 +117,8 @@ namespace boost { namespace fusion
 
         template <typename Sequence>
         BOOST_FUSION_GPU_ENABLED
-        vector(Sequence const& rhs)
+        vector(Sequence const& rhs,
+            typename boost::enable_if<traits::is_sequence<Sequence> >::type* = 0)
             : vec(BOOST_FUSION_VECTOR_COPY_INIT()) {}
 
         //  Expand a couple of forwarding constructors for arguments

include/boost/fusion/container/vector/vector10.hpp

@@ -10,6 +10,7 @@
 #include <boost/fusion/support/config.hpp>
 #include <boost/fusion/container/vector/vector10_fwd.hpp>
 #include <boost/fusion/support/sequence_base.hpp>
+#include <boost/fusion/support/is_sequence.hpp>
 #include <boost/fusion/support/detail/access.hpp>
 #include <boost/fusion/iterator/next.hpp>
 #include <boost/fusion/iterator/deref.hpp>

include/boost/fusion/container/vector/vector20.hpp

@@ -11,6 +11,7 @@
 #include <boost/fusion/support/config.hpp>
 #include <boost/fusion/container/vector/vector20_fwd.hpp>
 #include <boost/fusion/support/sequence_base.hpp>
+#include <boost/fusion/support/is_sequence.hpp>
 #include <boost/fusion/support/detail/access.hpp>
 #include <boost/fusion/iterator/next.hpp>
 #include <boost/fusion/iterator/deref.hpp>

include/boost/fusion/container/vector/vector30.hpp

@@ -10,6 +10,7 @@
 #include <boost/fusion/support/config.hpp>
 #include <boost/fusion/container/vector/vector30_fwd.hpp>
 #include <boost/fusion/support/sequence_base.hpp>
+#include <boost/fusion/support/is_sequence.hpp>
 #include <boost/fusion/support/detail/access.hpp>
 #include <boost/fusion/iterator/next.hpp>
 #include <boost/fusion/iterator/deref.hpp>

include/boost/fusion/container/vector/vector40.hpp

@@ -11,6 +11,7 @@
 #include <boost/fusion/support/config.hpp>
 #include <boost/fusion/container/vector/vector40_fwd.hpp>
 #include <boost/fusion/support/sequence_base.hpp>
+#include <boost/fusion/support/is_sequence.hpp>
 #include <boost/fusion/support/detail/access.hpp>
 #include <boost/fusion/iterator/next.hpp>
 #include <boost/fusion/iterator/deref.hpp>

include/boost/fusion/container/vector/vector50.hpp

@@ -10,6 +10,7 @@
 #include <boost/fusion/support/config.hpp>
 #include <boost/fusion/container/vector/vector50_fwd.hpp>
 #include <boost/fusion/support/sequence_base.hpp>
+#include <boost/fusion/support/is_sequence.hpp>
 #include <boost/fusion/support/detail/access.hpp>
 #include <boost/fusion/iterator/next.hpp>
 #include <boost/fusion/iterator/deref.hpp>