[HOpenGL] Segfaults on MouseWheel

[Hendrik Iben]

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
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> HOpenGL at haskell.org
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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