[pypy-dev] bencher4 fialing own py3 builds

[Matti Picus]

Own nightly builds on p3.5 are failing numerous cpyext tests. The 
problem seems to be related to the _cffi_backend module somehow hitting 
an assert at import, but I cannot reproduce the problem locally. I have 
tried many things on the unicode-utf8-py3 branch to solve the problem, 
but to no avail. See the last 3 or 4 commits on that branch. Any help 
would be greatly appreciated. Perhaps we should retire bencher4 and find 
another build machine, one that we can control a bit more?
Matti