On Tue, Jan 26, 2021 at 3:50 AM Friedrich Romstedt <friedrichromstedt@gmail.com> wrote:
Hi,
This is with Python 3.8.2 64-bit and numpy 1.19.2 on Windows 10. I'd like to be able to convert some C++ extension type to a numpy array by using ``numpy.asarray``. The extension type implements the Python buffer interface to support this.
The extension type, called "Image" here, holds some chunk of ``double``, C order, contiguous, 2 dimensions. It "owns" the buffer; the buffer is not shared with other objects. The following Python code crashes::
image = <... Image production ...> ar = numpy.asarray(image)
However, when I say::
image = <... Image production ...> print("---") ar = numpy.asarray(image)
the entire program is executing properly with correct data in the numpy ndarray produced using the buffer interface.
Maybe a dereference bug. Try setting pointers to NULL after freeing, something like this: delete[] view->shape; view->shape = NULL; delete[] view->strides; view->strides = NULL; ... delete[] self->data; self->data = NULL;