diff --git a/doc/container.qbk b/doc/container.qbk
index 8f1a54b..3d0ae54 100644
--- a/doc/container.qbk
+++ b/doc/container.qbk
@@ -1200,7 +1200,7 @@ use [*Boost.Container]? There are several reasons for that:
    then adapted for [*Boost.Interprocess]. Thanks for such a great container.
 
 *  `static_vector` was based on Andrew Hundt's and Adam Wulkiewicz's high-performance `varray` class.
-   Many performance improvements of `vector` were also inspired in their implementation. Thanks!
+   Many performance improvements of `vector` were also inspired by their implementation. Thanks!
 
 *  Howard Hinnant's help and advices were essential when implementing move semantics,
    improving allocator support or implementing small string optimization. Thanks Howard
@@ -1221,6 +1221,7 @@ use [*Boost.Container]? There are several reasons for that:
    * [@https://svn.boost.org/trac/boost/ticket/11856 Trac #11856 : ['"pool_resource.cpp error: declaration changes meaning"]].
    * [@https://svn.boost.org/trac/boost/ticket/11866 Trac #11866 : ['"small_vector does not have range constructor"]].
    * [@https://svn.boost.org/trac/boost/ticket/11867 Trac #11867 : ['"small_vector should have constructor and assignment operator taking other small_vector"]].
+   * [@https://svn.boost.org/trac/boost/ticket/11912 Trac #11912 : ['"flat_map use of vector::priv_forward_range_insert_expand_backwards may cause move with same source"]].
    * [@https://svn.boost.org/trac/boost/ticket/11957 Trac #11957 : ['"static_vector::max_size() is higher than the capacity"]].
    * [@https://svn.boost.org/trac/boost/ticket/12014 Trac #12014 : ['"boost::container::set can not insert const (ref) range"]].
    * [@https://github.com/boostorg/container/pull/33 GitHub #33: ['Make sure std::string constructor is available]].
diff --git a/include/boost/container/vector.hpp b/include/boost/container/vector.hpp
index 3e989f5..fabe92d 100644
--- a/include/boost/container/vector.hpp
+++ b/include/boost/container/vector.hpp
@@ -3106,7 +3106,10 @@ class vector
                old_values_destroyer.shrink_forward(new_size-s_before);
                this->m_holder.m_size = new_size;
                //Now move remaining last objects in the old buffer begin
-               ::boost::container::move(pos + raw_gap, old_finish, old_start);
+               T * const remaining_pos = pos + raw_gap;
+               if(remaining_pos != old_start){  //Make sure data has to be moved
+                  ::boost::container::move(remaining_pos, old_finish, old_start);
+               }
                //Once moved, avoid calling the destructors if trivial after move
                if(value_traits::trivial_dctr_after_move){
                   old_values_destroyer.release();
@@ -3246,8 +3249,9 @@ class vector
                const size_type rest_new = n - mid_n;
                insert_range_proxy.copy_n_and_update(this->m_holder.alloc(), old_start, rest_new);
                T* const move_start = old_start + rest_new;
-               //Displace old_end
-               T* const move_end = ::boost::container::move(pos, old_finish, move_start);
+               //Displace old_end, but make sure data has to be moved
+               T* const move_end = move_start != pos ? ::boost::container::move(pos, old_finish, move_start)
+                                                     : old_finish;
                //Destroy remaining moved elements from old_end except if they
                //have trivial destructor after being moved
                size_type n_destroy = s_before - n;