Decref capsules & fix py3 numpy test output

Cython/Utility/Buffer.c

@@ -107,7 +107,7 @@ typedef struct {
 /////////////// GetAndReleaseBuffer ///////////////
 #if PY_MAJOR_VERSION < 3
 static int __Pyx_GetBuffer(PyObject *obj, Py_buffer *view, int flags) {
-    PyObject *getbuffer_cobj = NULL;
+    PyObject *getbuffer_cobj;
 
   #if PY_VERSION_HEX >= 0x02060000
     if (PyObject_CheckBuffer(obj)) return PyObject_GetBuffer(obj, view, flags);
@@ -130,6 +130,7 @@ static int __Pyx_GetBuffer(PyObject *obj, Py_buffer *view, int flags) {
       #else
         func = (getbufferproc) PyCObject_AsVoidPtr(getbuffer_cobj);
       #endif
+        Py_DECREF(getbuffer_cobj);
         if (!func)
             goto fail;
 
@@ -144,13 +145,13 @@ static int __Pyx_GetBuffer(PyObject *obj, Py_buffer *view, int flags) {
 #if PY_VERSION_HEX < 0x02060000
 fail:
 #endif
-    Py_XDECREF(getbuffer_cobj);
+
     return -1;
 }
 
 static void __Pyx_ReleaseBuffer(Py_buffer *view) {
-    PyObject* obj = view->obj;
-    PyObject *releasebuffer_cobj = NULL;
+    PyObject *obj = view->obj;
+    PyObject *releasebuffer_cobj;
 
     if (!obj) return;
 
@@ -179,6 +180,8 @@ static void __Pyx_ReleaseBuffer(Py_buffer *view) {
         func = (releasebufferproc) PyCObject_AsVoidPtr(releasebuffer_cobj);
       #endif
 
+        Py_DECREF(releasebuffer_cobj);
+
         if (!func)
             goto fail;
 
@@ -197,7 +200,6 @@ fail:
     PyErr_WriteUnraisable(obj);
 
 nofail:
-    Py_XDECREF(releasebuffer_cobj);
     Py_DECREF(obj);
     view->obj = NULL;
 }

tests/run/numpy_test.pyx

@@ -176,12 +176,23 @@ try:
     ValueError: Buffer dtype mismatch, expected 'int' but got 'float' in 'DoubleInt.y'
 
     >>> print(test_packed_align(np.zeros((1,), dtype=np.dtype('b,i', align=False))))
-    array([(22, 23)], 
-          dtype=[('f0', '|i1'), ('f1', '!i4')])
-    >>> print(test_unpacked_align(np.zeros((1,), dtype=np.dtype('b,i', align=True))))
+    [(22, 23)]
+
+
+    The output changed in Python 3:
+    >> print(test_unpacked_align(np.zeros((1,), dtype=np.dtype('b,i', align=True))))
     array([(22, 23)], 
           dtype=[('f0', '|i1'), ('', '|V3'), ('f1', '!i4')])
 
+    ->
+
+    array([(22, 23)], 
+          dtype={'names':['f0','f1'], 'formats':['i1','!i4'], 'offsets':[0,4], 'itemsize':8, 'aligned':True})
+
+
+    >>> print(test_unpacked_align(np.zeros((1,), dtype=np.dtype('b,i', align=True))))
+    [(22, 23)]
+
     >>> print(test_packed_align(np.zeros((1,), dtype=np.dtype('b,i', align=True)))) #doctest: +ELLIPSIS
     Traceback (most recent call last):
         ...
@@ -444,12 +455,13 @@ cdef packed struct PartiallyPackedStruct2:
 def test_packed_align(np.ndarray[PackedStruct] arr):
     arr[0].a = 22
     arr[0].b = 23
-    return repr(arr).replace('<', '!').replace('>', '!')
+    return list(arr)
 
 def test_unpacked_align(np.ndarray[UnpackedStruct] arr):
     arr[0].a = 22
     arr[0].b = 23
-    return repr(arr).replace('<', '!').replace('>', '!')
+    # return repr(arr).replace('<', '!').replace('>', '!')
+    return list(arr)
 
 def test_partially_packed_align(np.ndarray[PartiallyPackedStruct] arr):
     arr[0].a = 22