@@ -441,15 +441,15 @@ static PyObject *Py_affine_transform(PyObject *self, PyObject *args, PyObject *k
         numpy::array_view<double, 2> result(dims);
         CALL_CPP("affine_transform", (affine_transform_2d(vertices, trans, result)));
         return result.pyobj();
-    } catch (py::exception) {
+    } catch (py::exception &) {
         PyErr_Clear();
         try {
             numpy::array_view<double, 1> vertices(vertices_obj);
             npy_intp dims[] = { (npy_intp)vertices.size() };
             numpy::array_view<double, 1> result(dims);
             CALL_CPP("affine_transform", (affine_transform_1d(vertices, trans, result)));
             return result.pyobj();
-        } catch (py::exception) {
+        } catch (py::exception &) {
             return NULL;
         }
     }
 
@@ -167,7 +167,7 @@ int convert_rect(PyObject *rectobj, void *rectp)
             rect->x2 = rect_arr(1, 0);
             rect->y2 = rect_arr(1, 1);
         }
-        catch (py::exception)
+        catch (py::exception &)
         {
             PyErr_Clear();
 
@@ -185,7 +185,7 @@ int convert_rect(PyObject *rectobj, void *rectp)
                 rect->x2 = rect_arr(2);
                 rect->y2 = rect_arr(3);
             }
-            catch (py::exception)
+            catch (py::exception &)
             {
                 return 0;
             }
@@ -347,7 +347,7 @@ int convert_trans_affine(PyObject *obj, void *transp)
             return 1;
         }
     }
-    catch (py::exception)
+    catch (py::exception &)
     {
         return 0;
     }
 
@@ -30,7 +30,7 @@ class exception : public std::exception
         }                                                                    \
         return (errorcode);                                                  \
     }                                                                        \
-    catch (const std::bad_alloc)                                             \
+    catch (const std::bad_alloc &)                                           \
     {                                                                        \
         PyErr_Format(PyExc_MemoryError, "In %s: Out of memory", (name));     \
         {                                                                    \
Original file line number	Diff line number	Diff line change
@@ -167,7 +167,7 @@ int convert_rect(PyObject rectobj, void rectp)
167	167	rect->x2 = rect_arr(1, 0);
168	168	rect->y2 = rect_arr(1, 1);
169	169	}
170		- catch (py::exception)
	170	+ catch (py::exception &)
171	171	{
172	172	PyErr_Clear();
173	173
@@ -185,7 +185,7 @@ int convert_rect(PyObject rectobj, void rectp)
185	185	rect->x2 = rect_arr(2);
186	186	rect->y2 = rect_arr(3);
187	187	}
188		- catch (py::exception)
	188	+ catch (py::exception &)
189	189	{
190	190	return 0;
191	191	}
@@ -347,7 +347,7 @@ int convert_trans_affine(PyObject obj, void transp)
347	347	return 1;
348	348	}
349	349	}
350		- catch (py::exception)
	350	+ catch (py::exception &)
351	351	{
352	352	return 0;
353	353	}