[bug #20453] netbsd gui thread safety

[Riccardo mottola]

Follow-up Comment #2, bug #20453 (project gnustep):

this is stack trace just on download, I don't think an alert panel should
have popped up, thus it is a problem with the update from a thread, I
suppose. On Mac or Linux I never got that. Xlib backend.


#0  0xbd3fc023 in poll () from /usr/lib/libc.so.12
#1  0xbd4deded in poll () from /usr/lib/libpthread.so.0
#2  0xbd0ad8d4 in _XPollfdCacheDel () from /usr/X11R6/lib/libX11.so.6
#3  0xbd0ae605 in _XRead () from /usr/X11R6/lib/libX11.so.6
#4  0xbd0af047 in _XReply () from /usr/X11R6/lib/libX11.so.6
#5  0xbd068e48 in XGetImage () from /usr/X11R6/lib/libX11.so.6
#6  0xbd1a25e6 in RGetXImage (context=0x81d2980, d=14680339, x=0, y=0,
    width=17, height=13) at xutil.c:229
#7  0xbd1c89b7 in _i_XGGState_Ops_DPSimage___________ (self=0x83f6e08,
    _cmd=0xbd1e18d8, matrix=0x8404d08, pixelsWide=17, pixelsHigh=13,
    bitsPerSample=8, samplesPerPixel=4, bitsPerPixel=32, bytesPerRow=68,
    isPlanar=0 '