Re: [matplotlib-devel] tk backend broken (somehow?)

[Phil E. <pel...@gm...>]

Mike made some changes to this recently.
https://github.com/matplotlib/matplotlib/pull/3778

May be the cause.

On 16 November 2014 18:12, Benjamin Root <ben...@ou...> wrote:

> And with my continuing saga of backend-specific things...
>
> I was using conda, but because it does not ship with pygtk support, I had
> to manually install pygtk into the conda environment and then install
> matplotlib from source. All that seemed to work fine when I worked on Wx
> and Gtk examples for my book.
>
> I went back to a (previously working) Tk example to polish it, and I get
> all sorts of errors now. I have tried multiple releases of matplotlib from
> source (doing a git clean -fxd between them), all with similar errors. In
> fact, with master, the error causes a segfault:
>
> ben@tigger:~/Documents/InteractiveMPL$ python chp5/slider_tk.py
> Exception in Tkinter callback
> Traceback (most recent call last):
>   File "/home/ben/miniconda/lib/python2.7/lib-tk/Tkinter.py", line 1486,
> in __call__
>     return self.func(*args)
>   File
> "/home/ben/miniconda/lib/python2.7/site-packages/matplotlib-1.5.x-py2.7-linux-x86_64.egg/matplotlib/backends/backend_tkagg.py",
> line 278, in resize
>     self.show()
>   File
> "/home/ben/miniconda/lib/python2.7/site-packages/matplotlib-1.5.x-py2.7-linux-x86_64.egg/matplotlib/backends/backend_tkagg.py",
> line 350, in draw
>     tkagg.blit(self._tkphoto, self.renderer._renderer, colormode=2)
>   File
> "/home/ben/miniconda/lib/python2.7/site-packages/matplotlib-1.5.x-py2.7-linux-x86_64.egg/matplotlib/backends/tkagg.py",
> line 30, in blit
>     id(data), colormode, id(bbox_array))
> TclError
> alloc: invalid block: 0x2cfe3b0: 0 0
> Aborted (core dumped)
>
> The line in question is (at least in v1.3.1, it is slightly different in
> more recent versions):
> tk.call("PyAggImagePhoto", photoimage, id(aggimage), colormode,
> id(bbox_array))
>
> This happens regardless of what example I use (my own or otherwise). There
> is no blit-specific code in the examples. All of this worked with the
> conda-supplied matplotlib, but never the
> from-source-into-a-conda-environment install.
>
> Thoughts?
> Ben Root
>
>
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