Am 31.08.12 17:32, schrieb Richard Oudkerk: > File "<frozen importlib._bootstrap>", line 128, in _write_atomic > OSError: [Errno 5] Input/output error: '/mnt/hgfs/Repos/cpython-dirty/Lib/__pycache__/codecs.cpython-33.pyc.3076609376' > Aborted > > I took this to be a failure to write the bytecompiled file. (A regression?) Sounds like a regression to me. However, errno 5 is EIO. Normally, you should get PermissionError(errno=13, EACCES). I could understand EROFS as well. This sounds like a bug in the VM software, which really should report EROFS if the volume is read-only, not EIO. You might want to check whether this really is a regression; in any case, I consider Python's reaction reasonable and then your setup as just not supported. However, I could also accept that a work-around is added for treating EIO also as an ignorable error. In any case, this is a separate issue.