On Fri, 2013-04-12 at 17:37 +0100, mark florisson wrote: > > > On 12 April 2013 13:20, Matěj Laitl <ma...@laitl.cz> wrote: > On 8. 4. 2013 Matěj Laitl wrote: > > Hi cython-devel and Mark, > > I was getting > > > > > Fatal Python error: Acquisition count is 0 (line XYZ) > > > > when I was doing > > > > > cdef class MemViewContainer: > > > cdef double[:, :] A > > > > > > cdef a_method(self): > > > self.A = np.eye(2) > > > some_function(self.A.T) > > > some_function(self.A.T) > > > > I have found out that it is caused by the self.A.T > expression - Cython emits > > __PYX_XDEC_MEMVIEW() after the call, but no > __PYX_INC_MEMVIEW() before the > > call. This doesn't happen if the memoryview is a > function-local variable. > > > > Proper test case is in the pull request [1] along with an > ad-hoc patch that > > fixes the problem here, but needs review whether it is > actually correct. I'd > > be very grateful if a fix for this problem could get it into > Cython 0.19. > > > > Cython version: 0.19b1 3a6b9856187d7e490e08 > > > > [1] https://github.com/cython/cython/pull/201 > > > Bump. Anything else I can provide to help with getting this > fixed in 0.19? > > Ragards, > Matěj > > Thanks for the bump, I merged it. > > > Stefan, do you want to wait with 0.19 for the strides fix? We don't > know when 0.20 would be, I'd like to give it a go this weekend.
Hey, if you have started on the strides fix or a PR, give me a ping and I will have a look at it if you like. If you still need tests, checking that these arrays work as both C and F-contiguous should be sufficient (of course numpy does not know about that yet, unless NPY_RELAXED_STRIDES_CHECKING is set): max_intp = np.iinfo(np.intp).max # obviously weird stride a = np.ones((1, 10, 1)) a.strides = (max_intp, a.itemsize, max_intp) and: a = np.ones((10, 0, 10)) a.strides = (max_intp,) * 3 Regards, Sebastian > _______________________________________________ > cython-devel mailing list > cython-devel@python.org > http://mail.python.org/mailman/listinfo/cython-devel _______________________________________________ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
