# PyPy 2.0.1 - Bohr Smørrebrød

We're pleased to announce PyPy 2.0.1. This is a stable bugfix release over 2.0. You can download it here:

> https://pypy.org/download.html

The fixes are mainly about fatal errors or crashes in our stdlib. See below for more details.

## What is PyPy?

PyPy is a very compliant Python interpreter, almost a drop-in replacement for CPython 2.7. It's fast (pypy 2.0 and cpython 2.7.3 performance comparison) due to its integrated tracing JIT compiler.

This release supports x86 machines running Linux 32/64, Mac OS X 64 or Windows 32. Support for ARM is progressing but not bug-free yet.

## Highlights

- fix an occasional crash in the JIT that ends in RPython Fatal error: NotImplementedError.

- id(x) is now always a positive number (except on int/float/long/complex). This fixes an issue in `_sqlite.py` (mostly for 32-bit Linux).

- fix crashes of callback-from-C-functions (with cffi) when used together with Stackless features, on asmgcc (i.e. Linux only). Now gevent should work better.

- work around an eventlet issue with socket._decref_socketios().

Cheers, arigo et. al. for the PyPy team