Ah, on http://bugs.python.org/issue21778 I got the answer as to what

the expected way to call this is.

1 files changed, 3 insertions, 6 deletions

diff --git a/c/minibuffer.h b/c/minibuffer.h
index 6d3eae5..92cf079 100644
--- a/c/minibuffer.h
+++ b/c/minibuffer.h
@@ -105,12 +105,9 @@ static PyObject *mb_str(MiniBufferObj *self)
 
 static int mb_getbuf(MiniBufferObj *self, Py_buffer *view, int flags)
 {
-    static Py_ssize_t dummy_stride = 1;
-    int res = PyBuffer_FillInfo(view, (PyObject *)self,
-                                self->mb_data, self->mb_size,
-                                /*readonly=*/0, PyBUF_CONTIG | PyBUF_FORMAT);
-    view->strides = &dummy_stride;
-    return res;
+    return PyBuffer_FillInfo(view, (PyObject *)self,
+                             self->mb_data, self->mb_size,
+                             /*readonly=*/0, flags);
 }
 
 static PySequenceMethods mb_as_sequence = {