PyArg_ParseTuple("t") calls PyObject_GetBuffer() and then raise an error if arg->ob_type->tp_as_buffer->bf_releasebuffer is not NULL. I think that it should call PyBuffer_Release(&view) before raising the error, or simply check bf_releasebuffer before calling PyObject_GetBuffer().

getbuffer() calls PyObject_GetBuffer() and then raise an error if the buffer is not contiguous. I think that it should call PyBuffer_Release() before the error.

Attached patch fixes both errors.

Tell me if I'm wrong :-)