New issue 3149: [compatability] excpeptions using a metaclass that defines __instancecheck__ and __subclasscheck__ doesn't work in pypy https://bitbucket.org/pypy/pypy/issues/3149/compatability-excpeptions-using-a
Thomas Grainger: repro here: [https://github.com/giampaolo/psutil/issues/1659](https://github.com/giampaolo/psutil/issues/1659) ``` import errno from psutil._compat import ChildProcessError class MyPretendChildProcessError(EnvironmentError): errno = errno.ECHILD try: raise MyPretendChildProcessError except ChildProcessError: pass ``` _______________________________________________ pypy-issue mailing list pypy-issue@python.org https://mail.python.org/mailman/listinfo/pypy-issue