[HOpenGL] Segfaults on MouseWheel

[Hendrik Iben]

Hendrik Iben schrieb:
> Hendrik Iben schrieb:
> 
>>Hi,
>>
>>I've been experimenting some time with the OpenGL and GLUT bindings and
>>there is one thing I do not understand.
>>While I've read trough the archive and understand that the GLUT binding
>>cannot handle more than the standard Mouse-buttons I thought handling
>>the MouseWheel-buttons should work.
>>However, regardless of whether I actually want to know about
>>Mouse-Buttons my applications segfault when I trigger the
>>WheelUp-Button. WheelDown works as expected (They are reported as button
>>4 and 5 in X).
>>I don't know where that behaviour comes from - other buttons at least
>>give an error message about the missing marshalling.
>>
>>I guess something is wrong with my setup as I could not find any similar
>>error report (AMD64, linux kernel 2.6.19 (64bit), X.org 7.2, GHC 6.6.1,
>>GLUT 2.1.1, OpenGL-2.2.1).
>>
>>Any suggestions how to further investigate this ? I'm willing to add
>>hooks to the GLUT (?) package if someone can point me to the right
>>direction...
>>
>>This is the output from doing a backtrace on the dumped core - not very
>>informative... :
>>#0  0x0000000000000000 in ?? ()
>>#1  0x00002b6f40ccd172 in __glutRegisterEventParser ()
>>   from /usr/lib/libglut.so.3
>>#2  0x00002b6f40ccdeb2 in glutMainLoop () from /usr/lib/libglut.so.3
>>#3  0x0000000000411c08 in
>>GLUTzm2zi1zi1_GraphicsziUIziGLUTziBegin_mainLoop_info
>>    ()
>>#4  0x000000000057b498 in stg_ap_0_fast ()
>>#5  0x0000000000529b98 in s5YF_info ()
>>#6  0x00002aaaaac8eaf8 in ?? ()
>>#7  0x00000000007c89d0 in ?? ()
>>#8  0x0000000000000000 in ?? ()
>>
>>Best regards,
>>Hendrik
>>_______________________________________________
>>HOpenGL mailing list
>>HOpenGL at haskell.org
>>http://www.haskell.org/mailman/listinfo/hopengl
> 
> 
> I'm sorry for not trying this before posting to this list. I just
> realized that the segfaults also happen with pure C-code (using GLUT).
> SDL bindings for Haskell still work correct with the wheel - wierd.
> 
> Best regards,
> Hendrik

Just to finish this: I could solve the problem by switching from GLUT to
freeglut.

Best regards,
Hendrik