$ gdb /usr/bin/lordsawar GNU gdb (GDB) 8.0 Copyright (C) 2017 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". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/bin/lordsawar...(no debugging symbols found)...done. (gdb) run Starting program: /usr/bin/lordsawar [Thread debugging using libthread_db enabled] Using host libthread_db library "/usr/lib/libthread_db.so.1". [New Thread 0x7fb84f81a700 (LWP 24999)] [New Thread 0x7fb84f019700 (LWP 25001)] [New Thread 0x7fb847ad4700 (LWP 25002)] [Thread 0x7fb847ad4700 (LWP 25002) exited] [New Thread 0x7fb847ad4700 (LWP 25003)] [New Thread 0x7fb8472d3700 (LWP 25004)] [New Thread 0x7fb845b91700 (LWP 25005)] [New Thread 0x7fb845390700 (LWP 25006)] [New Thread 0x7fb823fff700 (LWP 25007)] [New Thread 0x7fb8237fe700 (LWP 25008)] (lordsawar:24995): Gtk-WARNING **: Allocating size to gtkmm__GtkBox 0x5555628625c0 without calling gtk_widget_get_preferred_width/height(). How does the code know the size to allocate? (lordsawar:24995): Gtk-WARNING **: Allocating size to gtkmm__GtkBox 0x5555628625c0 without calling gtk_widget_get_preferred_width/height(). How does the code know the size to allocate? [New Thread 0x7fb82196f700 (LWP 25010)] [New Thread 0x7fb82116e700 (LWP 25011)] [New Thread 0x7fb80ffff700 (LWP 25012)] [New Thread 0x7fb80f7fe700 (LWP 25015)] [Thread 0x7fb82196f700 (LWP 25010) exited] [Thread 0x7fb80f7fe700 (LWP 25015) exited] [Thread 0x7fb8237fe700 (LWP 25008) exited] Thread 1 "lordsawar" received signal SIGSEGV, Segmentation fault. 0x00007fb85ef94da7 in Glib::ustring::ustring(Glib::ustring const&) () from /usr/lib/libglibmm-2.4.so.1