Fix for issue 7390

sympy · Apr 10, 2014 · d88f9cf · d88f9cf
1 parent 3633e72
commit d88f9cf
Showing 1 changed file with 2 additions and 4 deletions.
diff --git a/sympy/geometry/polygon.py b/sympy/geometry/polygon.py
@@ -145,15 +145,13 @@ def __new__(cls, *args, **kwargs):
                 got.add(p)
         i = -3
         while i < len(nodup) - 3 and len(nodup) > 2:
-            a, b, c = sorted(
-                [nodup[i], nodup[i + 1], nodup[i + 2]], key=default_sort_key)
+            a, b, c = nodup[i], nodup[i + 1], nodup[i + 2]
             if b not in shared and Point.is_collinear(a, b, c):
                 nodup[i] = a
-                nodup[i + 1] = None
                 nodup.pop(i + 1)
             i += 1
 
-        vertices = list(filter(lambda x: x is not None, nodup))
+        vertices = list(nodup)
 
         if len(vertices) > 3:
             rv = GeometryEntity.__new__(cls, *vertices, **kwargs)