From 098f742c77bd7d787f03f07fdf6612792ce34489 Mon Sep 17 00:00:00 2001
From: mdartic <mathieu@dartic.fr>
Date: Mon, 19 Sep 2016 11:55:58 +0200
Subject: [PATCH 1/2] Adding a test to check latLngs length

---
 spec/test.closest.js | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/spec/test.closest.js b/spec/test.closest.js
index d9cd149..8dd4ade 100644
--- a/spec/test.closest.js
+++ b/spec/test.closest.js
@@ -70,6 +70,33 @@ describe('Closest on path with precision', function() {
       done();
   });
 
+  it('It should not alterate the latLngs of a polygon', function(done) {
+      var polygon = L.polygon([[0, 0], [10, 10], [0, 10]])/*.addTo(map)*/,
+          ll = [0, 5],
+          marker = L.marker(ll),
+          latlngs;
+
+      latlngs = polygon.getLatLngs();
+      if (L.Polyline._flat(latlngs)) {
+        assert.equal(latlngs.length, 3)
+      } else {
+        assert.equal(latlngs.length, 1)
+        assert.equal(latlngs[0].length, 3)
+      }
+
+      closest = L.GeometryUtil.closest(map, polygon, ll);
+
+      latlngs = polygon.getLatLngs();
+      if (L.Polyline._flat(latlngs)) {
+        assert.equal(latlngs.length, 3)
+      } else {
+        assert.equal(latlngs.length, 1)
+        assert.equal(latlngs[0].length, 3)
+      }
+
+      done();
+  });
+
   it('It should return null if layer param is not instance of Array|L.Polygon|L.Polyline (Leaflet 0.7.7 only)', function(done) {
       var campus = {
           "type": "Feature",

From e2e9c8f35104d6a89a3afbf61b3d2170251c2f6b Mon Sep 17 00:00:00 2001
From: mdartic <mathieu@dartic.fr>
Date: Mon, 19 Sep 2016 11:56:28 +0200
Subject: [PATCH 2/2] Fixing latLngs length test

---
 src/leaflet.geometryutil.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/leaflet.geometryutil.js b/src/leaflet.geometryutil.js
index 1cbc02e..535a206 100644
--- a/src/leaflet.geometryutil.js
+++ b/src/leaflet.geometryutil.js
@@ -190,7 +190,9 @@ L.GeometryUtil = L.extend(L.GeometryUtil || {}, {
                     }
                 }
                 return result;
-            } else if (layer[0] instanceof L.LatLng || typeof layer[0][0] === 'number') { // we could have a latlng as [x,y] with x & y numbers
+            } else if (layer[0] instanceof L.LatLng 
+                        || typeof layer[0][0] === 'number'
+                        || typeof layer[0].lat === 'number') { // we could have a latlng as [x,y] with x & y numbers or {lat, lng}
                 layer = L.polyline(layer);
             } else {
                 return result;
@@ -202,7 +204,8 @@ L.GeometryUtil = L.extend(L.GeometryUtil || {}, {
         if (! ( layer instanceof L.Polyline ) )
             return result;
 
-        latlngs = layer.getLatLngs().slice(0);
+        // deep copy of latlngs
+        latlngs = JSON.parse(JSON.stringify(layer.getLatLngs().slice(0)));
 
         // add the last segment for L.Polygon
         if (layer instanceof L.Polygon) {