Re: [Matplotlib-users] random crash, Pango-WARNING

[Steve S. <el...@gm...>]

Darren Dale wrote:
> On Sunday 26 February 2006 6:37 am, Steve Schmerler wrote:
> 
>>Hi
>>
>>With 0.87 and 0.86.2 mpl randomly crashes when executing this script:
>>
>>---------------------------
>>from pylab import *
>>from matplotlib import verbose
>>
>>verbose.level = 'debug-annoying'
>>##verbose.level = 'debug'
>>
>>rcParams['text.usetex'] = True
>>plot([1,2,3])
>>
>>savefig("image.eps")
>>---------------------------
>>
>>The crash is triggered when savefig() is called and only if
>>rcParams['text.usetex'] = True. The error message is
>>
>>  (test.py:7258): Pango-WARNING **: Invalid UTF-8 string passed to
>>pango_layout_set_text()
>>
>>I tried to track it down but the crash seems to occur in *different*
>>code segments (calling "python test.py" several times it crashed
>>sometimes after a call to dvips, sometimes dvipng, gs, ...). Sometimes
>>it even *doesn't* crash at all.
>>
>>I have the following pango-stuff installed (Debian):
>>
>>elcorto@ramrod:~$ COLUMNS=200 dpkg -l | grep pango
>>ii  libpango1.0-0                                1.8.1-1
>>
>>ii  libpango1.0-common                           1.8.1-1
>>
>>ii  libpango1.0-dbg                              1.8.1-1
>>
>>ii  libpango1.0-dev                              1.8.1-1
> 
> 
> I can't reproduce your result with pango 1.10.3 installed on a gentoo system 
> with python-2.4.2. Does the script crash if you set verbose.level=silent? It 
> looks like one of the stdout or stderr messages from dvips/gs/dvipng is 
> returning unicode, in which case you could try to convert them to strings 
> before passing them to verbose.report. Just a guess.

Yes, with verbose.level = 'silent' the script runs and saves the image 
but in interactive use the interpreter crashes (an errow message window 
pops up, verbose.level: silent in matplotlibrc).

cheers,
steve

-- 
Random number generation is the art of producing pure gibberish as 
quickly as possible.