[pacman-dev] cygwin and pactest weirdness

[Xavier]

For the last few months, I have been getting random failures, at
almost every make check run.
For example :
================================================================================
Running 'sync042'
Install a sync package conflicting with a local one
--------------------------------------------------------------------------------
==> Generating test environment
Traceback (most recent call last):
  File "./pactest/pactest.py", line 104, in <module>
    env.run()
  File "/divers/pacman/pactest/pmenv.py", line 71, in run
    t.generate()
  File "/divers/pacman/pactest/pmtest.py", line 108, in generate
    shutil.rmtree(self.root)
  File "/usr/lib/python2.5/shutil.py", line 169, in rmtree
    rmtree(fullname, ignore_errors, onerror)
  File "/usr/lib/python2.5/shutil.py", line 169, in rmtree
    rmtree(fullname, ignore_errors, onerror)
  File "/usr/lib/python2.5/shutil.py", line 169, in rmtree
    rmtree(fullname, ignore_errors, onerror)
  File "/usr/lib/python2.5/shutil.py", line 169, in rmtree
    rmtree(fullname, ignore_errors, onerror)
  File "/usr/lib/python2.5/shutil.py", line 169, in rmtree
    rmtree(fullname, ignore_errors, onerror)
  File "/usr/lib/python2.5/shutil.py", line 169, in rmtree
    rmtree(fullname, ignore_errors, onerror)
  File "/usr/lib/python2.5/shutil.py", line 178, in rmtree
    onerror(os.rmdir, path, sys.exc_info())
  File "/usr/lib/python2.5/shutil.py", line 176, in rmtree
    os.rmdir(path)
OSError: [Errno 90] Directory not empty:
'/divers/pacman/root/var/lib/pacman/sync/sync/pkg1-1.0-1'
make[2]: *** [check-local] Error 1
make[2]: Leaving directory `/divers/pacman'
make[1]: *** [check-am] Error 2
make[1]: Leaving directory `/divers/pacman'
make: *** [check-recursive] Error 1
make check  300.15s user 425.34s system 98% cpu 12:15.82 total

$ ls /divers/pacman/root/var/lib/pacman/sync/sync/*
/divers/pacman/root/var/lib/pacman/sync/sync/pkg1-1.0-1:

/divers/pacman/root/var/lib/pacman/sync/sync/pkg2-1.0-1:
depends  desc

It looks like pkg1 directory is actually empty afterward.
So it looks like some odd race conditions. I am not sure what
triggered it. Maybe I did a python update. Or my system/disk became
slower.
I don't really know, but it's quite annoying, and I am not sure what to do.

I guess I should try to write a minimal testcase, like a python script
creating and removing a bunch of files, see if I can reproduce it.