XFixesFetchRegion() crashes app

[Eirik Byrkjeflot Anonsen]

Kai-Uwe Behrmann <ku.b at gmx.de> writes:

> My application attaches a XFixes created reactangle to a window.
> Therefore it does a XOpenDisplay() + XFixesCreateRegion() +
> XCloseDisplay() inside one short function and done.
> After the above outlined function resturns a call to XFixesFetchRegion()
> from a outside observer forces the application to quit:
>
> PropertyNotify : _NET_COLOR_REGIONS    vvvvv      679x580+642+245  2
> X Error of failed request:  179
>   Major opcode of failed request:  155 (XFIXES)
>   Minor opcode of failed request:  19 (XFixesFetchRegion)
>   Serial number of failed request:  7927
>   Current serial number in output stream:  7927
>
> Any idea how to avoid a quit from XFixesFetchRegion()? A error message
> would be enough. A exit in not acceptable to the application.

My memory is rather unclear on this point, but if the default error
handler exits the program, the solution could be to install your own
error handler with XSetErrorHandler()

eirik