[Pythonmac-SIG] Problems with Tk (I think)

[Jan Erik Moström]

I'm new to Tk so it might be something that I might be doing wrong but I have a crash that I can't find the cause to.

The error message I get on the crash is:

python(19468,0x7fff70f5cbe0) malloc: *** error for object 0x1002c5a10: double free
*** set a breakpoint in malloc_error_break to debug
Abort trap


This is using the standard 2.6.1 version on OS X 10.6.3, but version 2.5 give the same result.

When I try this using a linux box (v2.5.2) the program runs as it should.

I tried to using the debugger to single step through the critical lines and it seem to crash when it should return from a menu item handler.

The code for that handler looks like this

	def saveToFile(self):
		filename = dlg.asksaveasfilename()
		self._storage.store(filename,self._win.getText())

Single stepping seem to indicate that the call to self._win.getText() works just fine, the store command saves some text to a file and the file is created with the correct text, but then something seem to happen:

(Pdb) s
--Return--
> /Users/jem/Desktop/testing.py(96)saveToFile()->None
-> self._storage.store(filename,self._win.getText())
(Pdb) s
2010-05-06 15:40:54.806 Python[19589:d07] *** __NSAutoreleaseFreedObject(): release of previously deallocated object (0x1011466f0) ignored
    


Does anyone have an idea what could be causing this?

The complete code is available at <http://tmp.myownsnapshots.com/pyproblem> (and yes, I know that the code looks a bit strange but I have my reasons :)

- jem