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App segmentation fault (CentOS 6.5)

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  App segmentation fault (CentOS 6.5) Reginaldo <abhishek1899@gmail.com> - 2014-04-23 11:08 -0700
    Re: App segmentation fault (CentOS 6.5) Mark H Harris <harrismh777@gmail.com> - 2014-04-23 14:46 -0500
      Re: App segmentation fault (CentOS 6.5) Terry Reedy <tjreedy@udel.edu> - 2014-04-23 20:09 -0400
    Re: App segmentation fault (CentOS 6.5) Wesley <nispray@gmail.com> - 2014-04-23 18:31 -0700

#70547 — App segmentation fault (CentOS 6.5)

Hi,

I have a GUI app that is written using wx. When I run it on CentOS 6.5, the following error messages are displayed and the app closes:

(python:10096): Pango-WARNING **: shaping failure, expect ugly output. shape-engine='BasicEngineFc', font='DejaVu Sans 10.9990234375', text=''

(python:10096): Pango-CRITICAL **: pango_layout_get_line_count: assertion `layout != NULL' failed

(python:10096): Gdk-CRITICAL **: IA__gdk_draw_layout: assertion `PANGO_IS_LAYOUT (layout)' failed
Segmentation fault

I checked if this was a font issue, but the font is installed on the system.

I use an idle thread in my application.

Could some let me know what the problem may be in this case? Thank you!

Python Version used: 2.6.6
wxPython Version used: 2.8.11

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#70548

On 4/23/14 1:08 PM, Reginaldo wrote:
>
> I have a GUI app that is written using wx. When I run it on CentOS 6.5, the following error messages are displayed and the app closes:

    Only fails on CentOS ?


> I use an idle thread in my application.

    Is your CentOS launching idle with -n switch ?



    What is different on this setup ?

    Have you tried more than one CentOS system?



>
   marcus

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#70559

On 4/23/2014 3:46 PM, Mark H Harris wrote:
> On 4/23/14 1:08 PM, Reginaldo wrote:
>>
>> I have a GUI app that is written using wx. When I run it on CentOS
>> 6.5, the following error messages are displayed and the app closes:
>
>     Only fails on CentOS ?
>
>
>> I use an idle thread in my application.
>
>     Is your CentOS launching idle with -n switch ?

I am quite sure that his 'idle thread' had nothing to do with Idle. 
Rather, it should be a thread that runs when the app is otherwise idle. 
However, if he were trying to run wx and Idle/tk in the same process, I 
would expect problems.

-- 
Terry Jan Reedy

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#70563

在 2014年4月24日星期四UTC+8上午2时08分29秒，Reginaldo写道：
> Hi,
> 
> 
> 
> I have a GUI app that is written using wx. When I run it on CentOS 6.5, the following error messages are displayed and the app closes:
> 
> 
> 
> (python:10096): Pango-WARNING **: shaping failure, expect ugly output. shape-engine='BasicEngineFc', font='DejaVu Sans 10.9990234375', text=''
> 
> 
> 
> (python:10096): Pango-CRITICAL **: pango_layout_get_line_count: assertion `layout != NULL' failed
> 
> 
> 
> (python:10096): Gdk-CRITICAL **: IA__gdk_draw_layout: assertion `PANGO_IS_LAYOUT (layout)' failed
> 
> Segmentation fault
> 
> 
> 
> I checked if this was a font issue, but the font is installed on the system.
> 
> 
> 
> I use an idle thread in my application.
> 
> 
> 
> Could some let me know what the problem may be in this case? Thank you!
> 
> 
> 
> Python Version used: 2.6.6
> 
> wxPython Version used: 2.8.11

Maybe you can gdb python attach the running pid and check the backtrace.
Severay days ago, I use this guy to address thread hang and memory leak issues.
Just say here if that helps.

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