> Breakpoint 3, delete_frame (frame=<optimized out>, force=force@entry=XIL(0x98a0)) at frame.c:2062
 > 2062          FOR_EACH_FRAME (frames, frame1)
 > (gdb) p Vframe_list
 > $1 = XIL(0)
 > (gdb) c
 > Continuing.
 >
 > Program received signal SIGSEGV, Segmentation fault.
 > delete_frame (frame=<optimized out>, force=force@entry=XIL(0x98a0)) at frame.c:2064
 > 2064              struct frame *f1 = XFRAME (frame1);

Thanks.  The attached patch should fix that.  Please check.

But I have no idea how to proceed with the x_reply_selection_request
failure.

martin