Capture polymorphic exceptions by reference

src/rod-eoc.cc

@@ -242,8 +242,7 @@ int main (int argc, char *argv[]) try
 
     }
 
- } catch (Exception e) {
-
-    std::cout << e << std::endl;
-
- }
+} catch (Exception& e)
+{
+    std::cout << e.what() << std::endl;
+}

src/rod3d.cc

@@ -241,10 +241,7 @@ int main (int argc, char *argv[]) try
         
     }            
 
-
-    // //////////////////////////////
- } catch (Exception e) {
-
-    std::cout << e << std::endl;
-
- }
+} catch (Exception& e)
+{
+    std::cout << e.what() << std::endl;
+}