Message9792

>>> f = file('x.tmp', 'wb')
>>> fd = f.fileno()
>>> type(fd)
<type 'org.python.core.io.FileIO'>
>>> os.fstat(fd)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OSError: [Errno 9] Bad file descriptor
>>> int(fd)
-1
>>> f.close()

In this code:
https://hg.python.org/jython/rev/e1a246f6a178#l5.89
we get at the integer file descriptor (index) via the private member fd. In my experience (with the debugger) fd is only ever -1, but there is an extra member that holds a Windows file handle.

This is the cause of a failure in test_tempfile, but not elsewhere as I believe we have comprehensively adapted to file descriptors that are objects.

If we support integer file descriptors, don't we need a table for them to index, as in C (and CPython)?