GDK_SYNCHRONIZE=1 gdb devilspie2 GNU gdb (Gentoo 7.6.2 p1) 7.6.2 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-pc-linux-gnu". For bug reporting instructions, please see: ... Reading symbols from /usr/bin/devilspie2...Reading symbols from /usr/lib64/debug/usr/bin/devilspie2.debug...done. done. (gdb) run Starting program: /usr/bin/devilspie2 warning: Could not load shared library symbols for linux-vdso.so.1. Do you need "set solib-search-path" or "set sysroot"? [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". [New Thread 0x7fffeed50700 (LWP 1440)] [New Thread 0x7fffee54f700 (LWP 1441)] (devilspie2:1436): 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 1264 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 0x00007ffff7adcbeb in _XSyncFunction () from /usr/lib64/libX11.so.6 #10 0x00007ffff7abeb86 in XCopyArea () from /usr/lib64/libX11.so.6 #11 0x00007ffff5259d26 in _cairo_xlib_surface_update_shm () from /usr/lib64/libcairo.so.2 #12 0x00007ffff525a748 in _cairo_xlib_surface_get_shm () from /usr/lib64/libcairo.so.2 #13 0x00007ffff525741a in _cairo_xlib_surface_acquire_source_image () from /usr/lib64/libcairo.so.2 #14 0x00007ffff52290df in _cairo_surface_acquire_source_image () from /usr/lib64/libcairo.so.2 #15 0x00007ffff51f5f4d in _pixman_image_for_pattern () from /usr/lib64/libcairo.so.2 #16 0x00007ffff51f68de in _cairo_image_source_create_for_pattern () from /usr/lib64/libcairo.so.2 #17 0x00007ffff5225c1a in clip_and_composite_boxes.part.12 () from /usr/lib64/libcairo.so.2 #18 0x00007ffff5226156 in clip_and_composite_boxes () from /usr/lib64/libcairo.so.2 #19 0x00007ffff52261c4 in _cairo_spans_compositor_mask () from /usr/lib64/libcairo.so.2 #20 0x00007ffff51e5b91 in _cairo_compositor_mask () from /usr/lib64/libcairo.so.2 #21 0x00007ffff5229574 in _cairo_surface_mask () from /usr/lib64/libcairo.so.2 #22 0x00007ffff51ede99 in _cairo_gstate_mask () from /usr/lib64/libcairo.so.2 #23 0x00007ffff51e0821 in cairo_mask () from /usr/lib64/libcairo.so.2 ---Type to continue, or q to quit--- #24 0x00007ffff51e08a3 in cairo_mask_surface () from /usr/lib64/libcairo.so.2 #25 0x00007ffff788616d in try_pixmap_and_mask.part.2 () from /usr/lib64/libwnck-3.so.0 #26 0x00007ffff78882f3 in _wnck_read_icons () from /usr/lib64/libwnck-3.so.0 #27 0x00007ffff787da74 in get_icons () from /usr/lib64/libwnck-3.so.0 #28 0x00007ffff787e857 in force_update_now () from /usr/lib64/libwnck-3.so.0 #29 0x00007ffff787faa0 in _wnck_window_create () from /usr/lib64/libwnck-3.so.0 #30 0x00007ffff7872aa6 in do_update_now () from /usr/lib64/libwnck-3.so.0 #31 0x00007ffff78734f4 in update_idle () from /usr/lib64/libwnck-3.so.0 #32 0x00007ffff6d01c2b in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0 #33 0x00007ffff6d01f84 in g_main_context_iterate.isra.23 () from /usr/lib64/libglib-2.0.so.0 #34 0x00007ffff6d022b2 in g_main_loop_run () from /usr/lib64/libglib-2.0.so.0 #35 0x0000000000403dc7 in main (argc=1, argv=0x7fffffffdc48) at src/devilspie2.c:452