Bug 1038114

Description of problem:
Skeinforge uses PyPy and Tkinter. Everithing works, but when I want to close a particular window, it is nto closed and I get the following error:

From callback <function PythonCmd at 0x00007f8064935cb8>:
Traceback (most recent call last):
  File "/usr/lib64/pypy-2.2.0/lib_pypy/_tkinter/app.py", line 56, in PythonCmd
    with self.app._tcl_lock_released():
  File "/usr/lib64/pypy-2.2.0/lib-python/2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/usr/lib64/pypy-2.2.0/lib_pypy/_tkinter/app.py", line 164, in _tcl_lock_released
    self._tcl_lock.release()
error: release unlocked lock

Version-Release number of selected component (if applicable):
pypy-2.2.0-1.fc20.x86_64

How reproducible:
Repeats always on my machine.

Steps to Reproduce:
1. Install pypy 2.2.0, tk-devel, skeinforge
2. Run pypy as root, import Tkinter (to bytecompile it) (shouldn't be necessary in 2.2.1)
3. Run the following command (as regular user):

pypy /usr/lib/python2.7/site-packages/skeinforge/skeinforge_application/skeinforge.py

4. In the left lover corner push Skeinforge button and select an STL file

If you need any, grab: http://churchyard.fedorapeople.org/pypy-test.stl

5. Let Skeinforge slice it (app has no response, progress is written in the console)
6. After the slciing a window is open with visualisation of the Gcode
7. Close the new window by clicking on your's window manager close button or hitting Alt+F4 (or in any other regular way of closing the window)

Actual results:
Nothing happens with the window, an error is thrown into the console

Expected results:
Window closes

Additional info:
Works well with Python instead of PyPy (start with step 3. and replace pypy command with python).