diff --git a/include/boost/geometry/algorithms/detail/overlay/get_turn_info_for_endpoint.hpp b/include/boost/geometry/algorithms/detail/overlay/get_turn_info_for_endpoint.hpp
index b78489b04..ceb291691 100644
--- a/include/boost/geometry/algorithms/detail/overlay/get_turn_info_for_endpoint.hpp
+++ b/include/boost/geometry/algorithms/detail/overlay/get_turn_info_for_endpoint.hpp
@@ -82,10 +82,14 @@ public:
     inline i_info_type const& i_info() const { return m_result.template get<0>(); }
     inline d_info_type const& d_info() const { return m_result.template get<1>(); }
 
+    // TODO: not it's more like is_spike_ip_p
     inline bool is_spike_p() const
     {
         if ( m_side_calc.pk_wrt_p1() == 0 )
         {
+            if ( ! is_ip_j<0>() )
+                return false;
+
             int const qk_p1 = m_side_calc.qk_wrt_p1();
             int const qk_p2 = m_side_calc.qk_wrt_p2();
                 
@@ -103,10 +107,14 @@ public:
         return false;
     }
 
+    // TODO: not it's more like is_spike_ip_q
     inline bool is_spike_q() const
     {
         if ( m_side_calc.qk_wrt_q1() == 0 )
         {
+            if ( ! is_ip_j<1>() )
+                return false;
+
             int const pk_q1 = m_side_calc.pk_wrt_q1();
             int const pk_q2 = m_side_calc.pk_wrt_q2();
                 
@@ -143,6 +151,36 @@ private:
         return result.template get<0>().count == 2;
     }
 
+    template <std::size_t OpId>
+    bool is_ip_j() const
+    {
+        int arrival = d_info().arrival[OpId];
+        bool same_dirs = d_info().dir_a == 0 && d_info().dir_b == 0;
+
+        if ( same_dirs )
+        {
+            if ( i_info().count == 2 )
+            {
+                if ( ! d_info().opposite )
+                {
+                    return arrival != -1;
+                }
+                else
+                {
+                    return arrival != -1;
+                }
+            }
+            else
+            {
+                return arrival == 0;
+            }
+        }
+        else
+        {
+            return arrival == 1;
+        }
+    }
+
     result_type m_result;
     side_calculator_type m_side_calc;
     RobustPolicy const& m_robust_policy;
@@ -472,7 +510,8 @@ struct get_turn_info_for_endpoint
                 // handle spikes
 
                 // P is spike and should be handled
-                if ( !is_p_last && ip_info.is_pj
+                if ( !is_p_last
+                  && ip_info.is_pj // this check is redundant (also in is_spike_p) but faster
                   && inters.i_info().count == 2
                   && inters.is_spike_p() )
                 {
@@ -482,7 +521,8 @@ struct get_turn_info_for_endpoint
                            p_pos, q_pos, tp_model, out);
                 }
                 // Q is spike and should be handled
-                else if ( !is_q_last && ip_info.is_qj
+                else if ( !is_q_last
+                       && ip_info.is_qj // this check is redundant (also in is_spike_q) but faster
                        && inters.i_info().count == 2
                        && inters.is_spike_q() )
                 {
diff --git a/include/boost/geometry/algorithms/detail/within/point_in_geometry.hpp b/include/boost/geometry/algorithms/detail/within/point_in_geometry.hpp
index fc386d84b..36ac44d36 100644
--- a/include/boost/geometry/algorithms/detail/within/point_in_geometry.hpp
+++ b/include/boost/geometry/algorithms/detail/within/point_in_geometry.hpp
@@ -37,13 +37,13 @@ namespace boost { namespace geometry {
 #ifndef DOXYGEN_NO_DETAIL
 namespace detail { namespace within {
 
-int check_result_type(int result)
+inline int check_result_type(int result)
 {
     return result;
 }
 
 template <typename T>
-void check_result_type(T result)
+inline void check_result_type(T result)
 {
     BOOST_ASSERT(false);
 }
diff --git a/include/boost/geometry/extensions/algorithms/dissolve.hpp b/include/boost/geometry/extensions/algorithms/dissolve.hpp
index 14e4a9b9f..6190cd8f0 100644
--- a/include/boost/geometry/extensions/algorithms/dissolve.hpp
+++ b/include/boost/geometry/extensions/algorithms/dissolve.hpp
@@ -99,10 +99,13 @@ struct dissolve_ring_or_polygon
                 RescalePolicy const& rescale_policy,
                 OutputIterator out)
     {
+        typedef typename point_type<Geometry>::type point_type;
+
         // Get the self-intersection points, including turns
         typedef detail::overlay::traversal_turn_info
             <
-                typename point_type<Geometry>::type
+                point_type,
+                typename segment_ratio_type<point_type, RescalePolicy>::type
             > turn_info;
 
         std::vector<turn_info> turns;
@@ -212,6 +215,7 @@ template
     typename GeometryOut
 >
 struct dissolve
+    : not_implemented<GeometryTag, GeometryOutTag>
 {};
 
 
diff --git a/include/boost/geometry/policies/robustness/get_rescale_policy.hpp b/include/boost/geometry/policies/robustness/get_rescale_policy.hpp
index 8b92567e3..142a3592e 100644
--- a/include/boost/geometry/policies/robustness/get_rescale_policy.hpp
+++ b/include/boost/geometry/policies/robustness/get_rescale_policy.hpp
@@ -16,6 +16,7 @@
 #include <cstddef>
 
 #include <boost/type_traits.hpp>
+#include <boost/mpl/assert.hpp>
 
 #include <boost/geometry/core/tag_cast.hpp>
 
@@ -211,14 +212,16 @@ struct rescale_policy_type
 #endif
     >
 {
-    BOOST_STATIC_ASSERT
-    ((
-        boost::is_same
-        <
-            typename geometry::tag<Point>::type,
-            geometry::point_tag
-        >::type::value
-    ));
+    static const bool is_point
+        = boost::is_same
+            <
+                typename geometry::tag<Point>::type,
+                geometry::point_tag
+            >::type::value;
+
+    BOOST_MPL_ASSERT_MSG((is_point),
+                         INVALID_INPUT_GEOMETRY,
+                         (typename geometry::tag<Point>::type));
 };
 
 
diff --git a/test/algorithms/overlay/get_turns_linear_linear.cpp b/test/algorithms/overlay/get_turns_linear_linear.cpp
index 4a02a459a..30760b3bc 100644
--- a/test/algorithms/overlay/get_turns_linear_linear.cpp
+++ b/test/algorithms/overlay/get_turns_linear_linear.cpp
@@ -237,6 +237,14 @@ void test_all()
     test_geometry<ls, ls>("LINESTRING(2 2,5 -1,15 2,18 0,20 0)",
                           "LINESTRING(30 0,19 0,18 0,0 0)",
                           expected("iuu")("iuu")("tiu")("mxi"));
+
+    test_geometry<mls, mls>("MULTILINESTRING((0 0,10 0,5 0))",
+                            "MULTILINESTRING((1 0,8 0,4 0))",
+                            expected("mii")("mix")("mux")("mui")("mix")("mii")("mxu")("mxi"));
+    
+    /*test_geometry<mls, mls>("MULTILINESTRING((0 0,10 0,5 0))",
+                            "MULTILINESTRING((1 0,8 0,4 0),(2 0,9 0,5 0))",
+                            expected("mii")("ccc")("ccc")("txx"));*/
 }
 
 int test_main(int, char* [])