Hi, On Mon, Feb 27, 2012 at 16:29, Maciej Fijalkowski <fijall at gmail.com> wrote: > On PyPy it probably should not do anything so you can maybe try with > #define _Py_ForgetReference(obj), but I don't actually know. Yes, it looks like it doesn't do anything in release builds of CPython. It's there for debugging. A bientôt, Armin.