deadlock. add a warning to subprocess docs about this, similar to Popen.wait's.
refs http://bugs.jython.org/issue1351

Will backport.

be called at the end of each test that spawns children (perhaps it
should be called from regrtest instead?).  This will hopefully prevent
some of the unexplained failures in the buildbots (hppa and alpha)
during tests that spawn children.  The problems were not reproducible.
There were many zombies that remained at the end of several tests.
In the worst case, this shouldn't cause any more problems,
though it may not help either.  Time will tell.

  python .
  python < .

both print a message, return non-zero and do not core dump.

files on the platform.

invoking the Python interpreter (which didn't work on non-english Windows
versions). Check return codes instead.

Windows.  Hacked it to pass, but not sure it's worth the
bother.

but verify_valid_flag() wasn't expecting that.  Will backport.

Also provide a warning if a directory is passed on the command line.
Add minimal command line test.

Will backport.