Hi,

> I've stumbled upon a very annoying segmentation fault.  It is triggered by
> performing an Alt-TAB operation while gitk is running.  If gitk is not
> running, everything runs fine.

FWIW, I don't see that behaviour. It may have to do with 32 vs. 64 bit 
differences.

> Here's the backtrace from GDB:
> #0  memcpy () at ../sysdeps/x86_64/memcpy.S:267
> #1  0x000000000040f692 in imageToTexture (screen=0xe5cf40,
> texture=0x1383c20, image=0x1383c70 "\377\377\377\377\003",
> width=4290772992, height=4290772992, format=32993, type=5121) at
> texture.c:114
> #2  0x000000000040f986 in imageBufferToTexture (screen=0xe5cf40,
> texture=0x1383c20, image=0x1383c70 "\377\377\377\377\003",
> width=4290772992, height=4290772992) at texture.c:180
> #3  0x000000000040fad9 in iconToTexture (screen=0xe5cf40, icon=0x1383c20)
> at texture.c:229

Something must be very, very wrong with that icon. A width and height of 4 
billion pixels is obviously wrong ;-)
What's the output of 'xprop' and 'xprop 32c _NET_WM_ICON' for the gitk window? 
Does initiating scale at the same time work (and show the icons)?

Regards,

Danny
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