Hi Sean,

On Thu, Jul 31, 2014 at 11:35:57AM -0500, Sean Vig wrote:
> Hey,
> 
> In working on [1], I ran into a weird test failure in test_manager.py:
> test_default_float that happens in Python 2 [2] but not Python 3 [3]. I
> thought this was related to the changes in that PR, since Python 2 tests
> had run successfully before for the cffi branch [4]. However, I found that
> I could reproduce the failure in [2], even from the main cffi branch.
> 
> If anyone else could try to replicate this, or possibly track down the seg
> fault, I'd appreciate it. I've made a gist with everything to reproduce it
> here:
> 
> https://gist.github.com/flacjacket/118e3b3d69e076e26c11
> 
> Here's what to do:
> 
> 1. Checkout the cffi branch from https://github.com/tych0/qtile/tree/cffi
> (you can get this in your git repo doing something like: git remote add
> tych0 https://github.com/tych0/qtile.git; git fetch tych0; git checkout -t
> tych0/cffi). You'll need all the appropriate dependencies (see
> https://github.com/tych0/qtile/blob/cffi/.travis.yml)
> 
> 2. Download test.py and test_config.py from the gist (I put them in ~),
> you'll need to change the `sys.path.insert(0, '/home/sean/qtile/qtile')`
> lines to point to your git directory
> 
> 3. Run the commands in run_tests.sh in the gist. You can run these commands
> in separate terminals if you want to see output separately. Here again,
> I've hardcoded my git directory, so you'll have to change that. Note the
> location of test.py and test_config.py are hardcoded, modify if you put
> them somewhere other than ~.
> 
> Trying to track it down, I get a segfault coming from libqtile/xcbq.pyL534,
> `return self.conn.conn.core.ConfigureWindow(self.wid, mask, values)` when
> running the command `c.window.move_floating(10, 20, 42, 42)`, which makes
> me think it's an xcffib problem (????). Changing python2 to python3 (2.7 to
> 3.3), my test.py script runs successfully.

What's the backtrace if you run qtile's python inside gdb? I think can
do it via something like:

DISPLAY=:1 gdb python2
(gdb) run /home/sean/qtile/qtile/bin/qtile -l INFO -c ~/test_config.py

Tycho

> Any feedback on this would be greatly appreciated, thanks!
> 
> Sean
> 
> [1] https://github.com/tych0/qtile/pull/5
> [2] https://travis-ci.org/tych0/qtile/jobs/31291683 Python 2.7, see first
> error in test.test_manager.test_default_float
> [3] https://travis-ci.org/tych0/qtile/jobs/31291687 above tests pass for
> Python 3.3
> [4] https://travis-ci.org/tych0/qtile/builds/31285277 Python 2.7 passes here
> 
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