ext/cumo/narray/gen/tmpl/accum_index.c in cumo-0.1.2 vs ext/cumo/narray/gen/tmpl/accum_index.c in cumo-0.2.0

@@ -111,9 +111,14 @@
             <% else %>
             reduce = cumo_na_reduce_dimension(argc, argv, 1, &self, &ndf, 0);
             <% end %>
         }
 
-        return cumo_na_ndloop(&ndf, 2, self, reduce);
+        if (cumo_na_has_idx_p(self)) {
+            VALUE copy = cumo_na_copy(self); // reduction does not support idx, make conttiguous
+            return cumo_na_ndloop(&ndf, 2, copy, reduce);
+        } else {
+            return cumo_na_ndloop(&ndf, 2, self, reduce);
+        }
     }
     <% end %>
 }