gui apps segfault on Linux/x86/clang/libobjc2

[Riccardo Mottola]

Hi,

on plain Linux/x86, using clang, a simple gui app like Ink fails to start:

Program received signal SIGSEGV, Segmentation fault.
0xb3ecb101 in xcb_writev () from /usr/lib/libxcb.so.1
(gdb) bt
#0  0xb3ecb101 in xcb_writev () from /usr/lib/libxcb.so.1
#1  0xb40653ce in _XSend () from /usr/lib/libX11.so.6
#2  0xb40659c1 in _XReply () from /usr/lib/libX11.so.6
#3  0xb404b45e in XGetWindowProperty () from /usr/lib/libX11.so.6
#4  0xb404a253 in XGetIconSizes () from /usr/lib/libX11.so.6
#5  0xb443ba49 in -[XGServer(WindowOps) iconSize] (self=0x8434cd4, 
_cmd=0xb7f74b18 <.objc_selector_list+64>)
    at XGServerWindow.m:4565
#6  0xb7d418ce in GSGetIconSize () from 
/System/Library/Libraries/libgnustep-gui.so.0.26
#7  0xb7a56180 in +[NSAppIconView initialize] () from 
/System/Library/Libraries/libgnustep-gui.so.0.26
#8  0xb714015c in objc_send_initialize () from 
/System/Library/Libraries/libobjc.so.4.6
#9  0xb714c4d8 in slowMsgLookup () from 
/System/Library/Libraries/libobjc.so.4.6
#10 0xb71525e1 in objc_msgSend () from 
/System/Library/Libraries/libobjc.so.4.6
#11 0xb7a6243d in -[NSApplication(Private) _appIconInit] () from 
/System/Library/Libraries/libgnustep-gui.so.0.26
#12 0xb7a57e3b in -[NSApplication _init] () from 
/System/Library/Libraries/libgnustep-gui.so.0.26
#13 0xb74551a2 in -[NSObject performSelector:withObject:] () from 
/System/Library/Libraries/libgnustep-base.so.1.25
#14 0xb74eb575 in -[NSObject(NSThreadPerformAdditions) 
performSelector:onThread:withObject:waitUntilDone:modes:] ()
   from /System/Library/Libraries/libgnustep-base.so.1.25
#15 0xb74eb1ef in -[NSObject(NSThreadPerformAdditions) 
performSelectorOnMainThread:withObject:waitUntilDone:modes:] ()
   from /System/Library/Libraries/libgnustep-base.so.1.25
#16 0xb74eb294 in -[NSObject(NSThreadPerformAdditions) 
performSelectorOnMainThread:withObject:waitUntilDone:] ()
   from /System/Library/Libraries/libgnustep-base.so.1.25
#17 0xb7a58220 in -[NSApplication init] () from 
/System/Library/Libraries/libgnustep-gui.so.0.26
#18 0xb7a579bf in +[NSApplication sharedApplication] () from 
/System/Library/Libraries/libgnustep-gui.so.0.26
#19 0xb7a2c6f5 in NSApplicationMain () from 
/System/Library/Libraries/libgnustep-gui.so.0.26
#20 0x0804aae0 in main (argc=<optimized out>, argv=<optimized out>, 
env=<optimized out>) at main.m:33

I somehow have a de-ja-vu about iconsize, but it was fixed by Wolfgang 
Months ago!

What's wrong??

Riccardo