[issue22810] tkinter: "alloc: invalid block:" after askopenfilename

[lccat]

New submission from lccat:

After running the Tkinter file dialog ( tkinter.filedialog.askopenfilename() ), 
and closing the tkinter window the following error message is displayed:
alloc: invalid block: 0xb035e0: b0 0
To reproduce see the attached python script "tktest". This does not stop the 
program as far as i can see.  Also happens for the directory selector.
Platform is linux.

--
components: Tkinter
files: tktest.py
messages: 230768
nosy: lccat
priority: normal
severity: normal
status: open
title: tkinter:  "alloc: invalid block:" after askopenfilename
versions: Python 3.4
Added file: http://bugs.python.org/file37142/tktest.py

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[issue22810] tkinter: "alloc: invalid block:" after askopenfilename

[lccat]

lccat added the comment:

Your output is different because you did not close the file dialog by selecting 
something and the pressing OK, or pressing cancel before destroying the main 
window. This is also the case here:
Traceback (most recent call last):
  File "tktest.py", line 6, in 
filename = tkinter.filedialog.askopenfilename()
  File "/usr/lib/python3.4/tkinter/filedialog.py", line 375, in askopenfilename
return Open(**options).show()
  File "/usr/lib/python3.4/tkinter/commondialog.py", line 48, in show
s = w.tk.call(self.command, *w._options(self.options))
_tkinter.TclError: can't invoke "grab" command: application has been destroyed
alloc: invalid block: 0x1d2cda0: a0 1
zsh: abort  python tktest.py

However, only the last two lines are relevant here, which you could not 
reproduce.

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[issue22810] tkinter: "alloc: invalid block:" after askopenfilename

[lccat]

lccat added the comment:

>>print(TkVersion)
8.6
Tk version in package manager:
python-pmw 2.0.0-2
Distribution:
arch linux, kernel 3.17.2-1-ARCH

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