Running devilspie2 in debug mode. Using scripts from folder: /home/foo/.config/devilspie2 ------------ List of LUA files handling "window_open" events in folder: /home/foo/.config/devilspie2/games.lua List of LUA files handling "window_close" events in folder: ------------ (devilspie2:18981): Gdk-ERROR **: The program 'devilspie2' received an X Window System error. This probably reflects a bug in the program. The error was 'BadMatch (invalid parameter attributes)'. (Details: serial 1148 error_code 8 request_code 62 (core protocol) minor_code 0) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the GDK_SYNCHRONIZE environment variable to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.) Program received signal SIGTRAP, Trace/breakpoint trap. 0x00007ffff6d09003 in g_logv () from /usr/lib64/libglib-2.0.so.0 (gdb) bt #0 0x00007ffff6d09003 in g_logv () from /usr/lib64/libglib-2.0.so.0 #1 0x00007ffff6d09182 in g_log () from /usr/lib64/libglib-2.0.so.0 #2 0x00007ffff76089d3 in _gdk_x11_display_error_event () from /usr/lib64/libgdk-3.so.0 #3 0x00007ffff76112e1 in gdk_x_error () from /usr/lib64/libgdk-3.so.0 #4 0x00007ffff7ae331a in _XError () from /usr/lib64/libX11.so.6 #5 0x00007ffff7ae0571 in handle_error () from /usr/lib64/libX11.so.6 #6 0x00007ffff7ae05b6 in handle_response () from /usr/lib64/libX11.so.6 #7 0x00007ffff7ae1258 in _XReply () from /usr/lib64/libX11.so.6 #8 0x00007ffff7adcb3d in XSync () from /usr/lib64/libX11.so.6 #9 0x00007ffff5259b4c in _cairo_xlib_surface_update_shm () from /usr/lib64/libcairo.so.2 #10 0x00007ffff525a748 in _cairo_xlib_surface_get_shm () from /usr/lib64/libcairo.so.2 #11 0x00007ffff525741a in _cairo_xlib_surface_acquire_source_image () from /usr/lib64/libcairo.so.2 #12 0x00007ffff52290df in _cairo_surface_acquire_source_image () from /usr/lib64/libcairo.so.2 #13 0x00007ffff51f5f4d in _pixman_image_for_pattern () from /usr/lib64/libcairo.so.2 #14 0x00007ffff51f68de in _cairo_image_source_create_for_pattern () from /usr/lib64/libcairo.so.2 #15 0x00007ffff5225c1a in clip_and_composite_boxes.part.12 () from /usr/lib64/libcairo.so.2 #16 0x00007ffff5226156 in clip_and_composite_boxes () from /usr/lib64/libcairo.so.2 #17 0x00007ffff52261c4 in _cairo_spans_compositor_mask () from /usr/lib64/libcairo.so.2 #18 0x00007ffff51e5b91 in _cairo_compositor_mask () from /usr/lib64/libcairo.so.2 #19 0x00007ffff5229574 in _cairo_surface_mask () from /usr/lib64/libcairo.so.2 #20 0x00007ffff51ede99 in _cairo_gstate_mask () from /usr/lib64/libcairo.so.2 #21 0x00007ffff51e0821 in cairo_mask () from /usr/lib64/libcairo.so.2 #22 0x00007ffff51e08a3 in cairo_mask_surface () from /usr/lib64/libcairo.so.2 #23 0x00007ffff788616d in try_pixmap_and_mask.part.2 () from /usr/lib64/libwnck-3.so.0 ---Type to continue, or q to quit---bt #24 0x00007ffff78882f3 in _wnck_read_icons () from /usr/lib64/libwnck-3.so.0 #25 0x00007ffff787da74 in get_icons () from /usr/lib64/libwnck-3.so.0 #26 0x00007ffff787e857 in force_update_now () from /usr/lib64/libwnck-3.so.0 #27 0x00007ffff787faa0 in _wnck_window_create () from /usr/lib64/libwnck-3.so.0 #28 0x00007ffff7872aa6 in do_update_now () from /usr/lib64/libwnck-3.so.0 #29 0x00007ffff78734f4 in update_idle () from /usr/lib64/libwnck-3.so.0 #30 0x00007ffff6d01c2b in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0 #31 0x00007ffff6d01f84 in g_main_context_iterate.isra.23 () from /usr/lib64/libglib-2.0.so.0 #32 0x00007ffff6d022b2 in g_main_loop_run () from /usr/lib64/libglib-2.0.so.0 #33 0x0000000000403dc7 in main ()