On Sat, 11 Oct 2014, Stefan Behnel wrote: > Yaroslav Halchenko schrieb am 11.10.2014 um 16:18: > > On Wed, 10 Sep 2014, Stefan Behnel wrote: > >> on behalf of the Cython dev team, I'm pleased to announce the release of > >> Cython 0.21, a major feature release. Thanks everyone who contributed code, > >> documentation improvements, test feedback, bug reports and/or otherwise > >> helpful insights for this release.
> > a little change detected while down-stream testing builds in Debian > > (previous version was 0.20.2 and it built fine) > > ------------------------------------------------------------ > > ... > > vertex_format.last_shader = self > > for i in xrange(vertex_format.vattr_count): > > attr = &vertex_format.vattr[i] > > if attr.per_vertex == 0: > > continue > > attr.index = glGetAttribLocation(self.program, <char > > *><bytes>attr.name) > > ^ > > ------------------------------------------------------------ > > kivy/graphics/shader.pyx:448:63: Casting temporary Python object to > > non-numeric non-Python type > Wow, interesting piece of code. What's that even supposed to do? > Looking up their code, I find that "attr.name" is a char*: > https://github.com/kivy/kivy/blob/master/kivy/graphics/vertex.pxd > So the above code creates a temporary Python bytes object by copying data > from a char*, then gets the char* to the internal object buffer and throws > the object away, thus deleting its buffer. Then it passes that invalidated > char* into a function. I can't see how this makes any sense. And I'm happy > to see that Cython catches this kind of bug now. > > I wondered if that is an intentional restriction now to restrict such > > casting > > only to numeric (and exclude the simplest form -- bytes/chars) or a > > regression? > It seems they fixed their code already: > https://github.com/kivy/kivy/commit/827bd6c7b7d04ec72cb3bdbf0ffcd90630d90008 Gotcha -- THANKS a bunch for a detailed response! CCing kivy maintainers in Debian -- get ready for upcoming cython 0.21 upload - a little patch to pick up! ;) -- Yaroslav O. Halchenko, Ph.D. http://neuro.debian.net http://www.pymvpa.org http://www.fail2ban.org Research Scientist, Psychological and Brain Sciences Dept. Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755 Phone: +1 (603) 646-9834 Fax: +1 (603) 646-1419 WWW: http://www.linkedin.com/in/yarik _______________________________________________ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
