Re: Trouble running the cairo backend

[Adam Fedor]

On Feb 8, 2008, at 7:21 PM, TMC wrote:
> tycho@ticky:~$ debugapp GWorkspace
> GNU gdb 6.6-debian
> Copyright (C) 2006 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License,  
> and you are
> welcome to change it and/or distribute copies of it under certain
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for  
> details.
> This GDB was configured as "i486-linux-gnu"...
> Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so. 
> 1".
> (gdb) b XGErrorHandler
> Function "XGErrorHandler" not defined.
> Make breakpoint pending on future shared library load? (y or [n]) y
>
> Breakpoint 1 (XGErrorHandler) pending.
> (gdb) run
> Starting program:
> /home/tycho/GNUstep/System/Applications/GWorkspace.app/GWorkspace
> [Thread debugging using libthread_db enabled]
> [New Thread -1221323088 (LWP 6528)]
> Breakpoint 2 at 0xb7125d7c: file XGServerEvent.m, line 125.
> Pending breakpoint "XGErrorHandler" resolved
> [Switching to Thread -1221323088 (LWP 6528)]
>
> Breakpoint 2, XGErrorHandler (display=0x829d2d8, err=0xbfa7fbc8)
>     at XGServerEvent.m:125
> 125     XGServerEvent.m: No such file or directory.
>         in XGServerEvent.m
> (gdb) backtrace
> #0  XGErrorHandler (display=0x829d2d8, err=0xbfa7fbc8) at
> XGServerEvent.m:125
> #1  0xb6f31bfa in _XError () from /usr/lib/libX11.so.6
> #2  0xb6f336c4 in _XReply () from /usr/lib/libX11.so.6
> #3  0xb6f2d5da in XSync () from /usr/lib/libX11.so.6
> #4  0xb713e8ee in +[XWindowBuffer windowBufferForWindow:depthInfo:] (
>     self=0xb7165d80, _cmd=0xb71694b8, awindow=0x82aa0b0,  
> aDI=0xbfa7fd60)
>     at XWindowBuffer.m:343

This might not actually be the right place where the error comes  
from. With X, errrors don't get reported right away. The way to fix  
this is to run the program like this:


run --GNU-Debug=XSynchronize

to force the Xserver to make all the calls as soon as they are  
requested.