PyPy v7.3.7: bugfix release of python 3.7 and 3.8

PyPy v7.3.7: bug-fix release of 3.7, 3.8

We are releasing a PyPy 7.3.7 to fix the recent 7.3.6 release's binary incompatibility with the previous 7.3.x releases. We mistakenly added fields to PyFrameObject and PyDateTime_CAPI that broke the promise of binary compatibility, which means that c-extension wheels compiled for 7.3.5 will not work with 7.3.6 and via-versa. Please do not use 7.3.6.

We have added a cursory test for binary API breakage to the https://github.com/pypy/binary-testing repo which hopefully will prevent such mistakes in the future.

Additionally, a few smaller bugs were fixed:

• Use uint for the request argument of fcntl.ioctl (issue 3568)

• Fix incorrect tracing of while True` body in 3.8 (issue 3577)

• Properly close resources when using a conncurrent.futures.ProcessPool (issue 3317)

• Fix the value of LIBDIR in _sysconfigdata in 3.8 (issue 3582)

You can find links to download the v7.3.7 releases here:

https://pypy.org/download.html

We would like to thank our donors for the continued support of the PyPy project. If PyPy is not quite good enough for your needs, we are available for direct consulting work. If PyPy is helping you out, we would love to hear about it and encourage submissions to our blog site via a pull request to https://github.com/pypy/pypy.org

We would also like to thank our contributors and encourage new people to join the project. PyPy has many layers and we need help with all of them: PyPy and RPython documentation improvements, tweaking popular modules to run on PyPy, or general help with making RPython's JIT even better.

If you are a python library maintainer and use C-extensions, please consider making a CFFI / cppyy version of your library that would be performant on PyPy. In any case both cibuildwheel and the multibuild system support building wheels for PyPy.