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

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

Darren Dale wrote:
> On Sunday 26 February 2006 7:50 pm, you wrote:
> 
>>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).
> 
> 
> Did you try to wrap the stderr/stdout output with str()?
> 

No. I have to correct myself. I just tested it again (with verbose.level
= 'silent' in the script and/or matplotlibrc) and it *does* crash so
it's not the verbose messages. This seems truly random ...

cheers,
steve

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