an unreadable directory.

new test cases for importing bad packages and unreadable packages dirs.

This introduces a small private API for this common pattern.
The issue has been discovered thanks to Martin's huge-mem buildbot.

would be finalized after the reference to its underlying BufferedRWPair's
writer got cleared by the GC.

- Using the file role with {placeholders} is IMO clearer than fake
  Python code.

- The fact that sys.version[:3] gives '3.2' is a CPython detail and
  should not be advertised (see #9442), even if some stdlib modules
  currently rely on that detail.

root, since the semantics varies across Unix variants.

root (directory permissions are ignored).

Reported and diagnosed by Thomas Kluyver.

if the underlying raw stream is unseekable, even if the seek could be
satisfied using the internal buffer.  Patch by John O'Connor.

- bigmemtest is replaced by precisionbigmemtest
- add a poor man's watchdog thread to print memory consumption

metaclass is registered with copyreg.  Patch by Nicolas M. Thiéry and
Craig Citro.

Patch by Dan Kenigsberg.

Issue #13034: When decoding some SSL certificates, the subjectAltName extension could be unreported.

Jarosch.

Thanks to Suman Saha for finding the bug and providing a patch.

module. Ignore the direcotry if its name matchs the module name (e.g.
"__init__.py") and raise a ImportError instead.

ready before having been set up.

multiprocessing.reduction, which may not be available (e.g. if the OS doesn't
support FD passing over Unix domain sockets).