Help debugging X program (moonlight)

["Marcelo E. Magallon" <mmagallo@debian.org>]

Hi,

 [ please keep me on the Cc:, I'm not on -devel atm ]

 this is driving me nuts.  moonlight segfaults on start up if libGL.so
 is utah-glx's instead of regular mesa's.  I have recompiled the
 bloody thing against utah-glx's libGL.so (it was using some Mesa
 extension that utah-glx doesn't provide) and now I'm dealing with
 what seems to be a documentation problem... compiled in `development
 mode' (that means don't strip the thing a behave a little different),
 I'm getting:

 [604 ysabell:~/devel/debian/moonlight/moonlight-0.5.3/src] gdb main/.libs/moonlight-0.5.3 core
 [...]
 (gdb)  bt
 #0  0x401c5627 in ErrorHandler (display=0x804efa8, event=0xbffff35c)
     at XGraphicsSystem.C:138
 #1  0x4043ba5d in _XError () from /usr/X11R6/lib/libX11.so.6
 #2  0x4043a14b in _XReply () from /usr/X11R6/lib/libX11.so.6
 #3  0x404293c3 in XInternAtom () from /usr/X11R6/lib/libX11.so.6
 #4  0x401cf84e in set_mwm_border (dpy=0x804efa8, w=41943087)
     at set_mwm_border.C:73
 [...]
 (gdb) list
 133     
 134     #ifndef NDEBUG
 135       // crash 'n' burn for debugging purposes
 136       char *str;
 137       str  = NULL;
 138       *str = '0';
 139       exit(-1);
 140     #endif
 141     
 142       return 0;
 (gdb) list set_mwm_border.C:73
 68         /* setup the property */
 69         motif_hints.flags = MWM_HINTS_DECORATIONS;
 70         motif_hints.decorations = flags;
 71      
 72         /* get the atom for the property */
 73         prop = XInternAtom( dpy, "_MOTIF_WM_HINTS", True );
 74         if (!prop) {
 75            /* something went wrong! */
 76            return;
 77         }
 (gdb) print *event
 $1 = {type = 0, display = 0x804efa8, resourceid = 71, serial = 92, 
   error_code = 8 '\b', request_code = 1 '\001', minor_code = 0
   '\000'}

 Error code 8 is (X11/X.h):

 #define BadMatch           8    /* parameter mismatch */

 but XInternAtom(3x) says:

        XInternAtom can generate BadAlloc and BadValue errors.

 wtf!

 Even more confusing, XRequest.1 is X_CreateWindow.  X_InternAtom is
 XRequest.16... arrrrggghhh!  There's a XCreateWindow a few lines
 before the call to XInternAtom, but none of the documented reasons
 for a BadMatch generated by XCreateWindow are met.

 Help?  Anyone?

                                Marcelo