$ gdb netsurf-gtk GNU gdb (Gentoo 7.8 vanilla) 7.8 Copyright (C) 2014 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 netsurf-gtk...Reading symbols from /usr/lib64/debug//usr/bin/netsurf-gtk.debug...(no debugging symbols found)...done. (no debugging symbols found)...done. (gdb) run file:///tmp/a/a.html Starting program: /usr/bin/netsurf-gtk file:///tmp/a/a.html 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 0x7fffebe78700 (LWP 11910)] [New Thread 0x7fffeb3bd700 (LWP 11911)] [New Thread 0x7fffeabbc700 (LWP 11912)] [New Thread 0x7fffea3bb700 (LWP 11914)] [New Thread 0x7fffe9bba700 (LWP 11915)] [New Thread 0x7fffe0bd8700 (LWP 11917)] [Thread 0x7fffe0bd8700 (LWP 11917) exited] [Thread 0x7fffeabbc700 (LWP 11912) exited] [Thread 0x7fffe9bba700 (LWP 11915) exited] Program received signal SIGSEGV, Segmentation fault. 0x000000000049a380 in gui_window_file_gadget_open () (gdb) thread apply all bt Thread 5 (Thread 0x7fffea3bb700 (LWP 11914)): #0 0x00007ffff35da4de in pthread_cond_timedwait () from /lib64/libpthread.so.0 #1 0x00007ffff5af2735 in g_cond_wait_until () from /usr/lib64/libglib-2.0.so.0 #2 0x00007ffff5a872b1 in g_async_queue_pop_intern_unlocked () from /usr/lib64/libglib-2.0.so.0 #3 0x00007ffff5a8783b in g_async_queue_timeout_pop () from /usr/lib64/libglib-2.0.so.0 #4 0x00007ffff5ad6416 in g_thread_pool_thread_proxy () from /usr/lib64/libglib-2.0.so.0 #5 0x00007ffff5ad59c5 in g_thread_proxy () from /usr/lib64/libglib-2.0.so.0 #6 0x00007ffff35d6073 in start_thread () from /lib64/libpthread.so.0 #7 0x00007ffff33134ad in clone () from /lib64/libc.so.6 Thread 3 (Thread 0x7fffeb3bd700 (LWP 11911)): #0 0x00007ffff3309dcd in poll () from /lib64/libc.so.6 #1 0x00007ffff5ab0b64 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0 #2 0x00007ffff5ab0c6c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0 #3 0x00007ffff5ab0ca9 in glib_worker_main () from /usr/lib64/libglib-2.0.so.0 #4 0x00007ffff5ad59c5 in g_thread_proxy () from /usr/lib64/libglib-2.0.so.0 #5 0x00007ffff35d6073 in start_thread () from /lib64/libpthread.so.0 #6 0x00007ffff33134ad in clone () from /lib64/libc.so.6 Thread 2 (Thread 0x7fffebe78700 (LWP 11910)): #0 0x00007ffff35da10c in pthread_cond_wait () from /lib64/libpthread.so.0 #1 0x00007ffff2a60320 in PR_WaitCondVar () from /usr/lib64/libnspr4.so #2 0x00007ffff63a0576 in js::GCHelperThread::threadMain(void*) () from /usr/lib64/libmozjs185.so.1.0 #3 0x00007ffff2a656dc in _pt_root () from /usr/lib64/libnspr4.so #4 0x00007ffff35d6073 in start_thread () from /lib64/libpthread.so.0 #5 0x00007ffff33134ad in clone () from /lib64/libc.so.6 Thread 1 (Thread 0x7ffff7fb38c0 (LWP 11906)): #0 0x000000000049a380 in gui_window_file_gadget_open () #1 0x0000000000461e06 in browser_window_callback () #2 0x0000000000449939 in hlcache_content_callback () #3 0x000000000043f16e in content_broadcast () #4 0x00000000004b55ce in html_mouse_action () #5 0x000000000049b809 in nsgtk_window_button_release_event () #6 0x00007ffff4858115 in _gtk_marshal_BOOLEAN__BOXED () from /usr/lib64/libgtk-x11-2.0.so.0 #7 0x00007ffff5dab398 in g_closure_invoke () from /usr/lib64/libgobject-2.0.so.0 #8 0x00007ffff5dbcc4d in signal_emit_unlocked_R () from /usr/lib64/libgobject-2.0.so.0 #9 0x00007ffff5dc4609 in g_signal_emit_valist () from /usr/lib64/libgobject-2.0.so.0 #10 0x00007ffff5dc4bfa in g_signal_emit () from /usr/lib64/libgobject-2.0.so.0 #11 0x00007ffff4967cc4 in gtk_widget_event_internal () from /usr/lib64/libgtk-x11-2.0.so.0 #12 0x00007ffff48568c4 in gtk_propagate_event () from /usr/lib64/libgtk-x11-2.0.so.0 #13 0x00007ffff4856c7b in gtk_main_do_event () from /usr/lib64/libgtk-x11-2.0.so.0 #14 0x00007ffff44d297c in gdk_event_dispatch () from /usr/lib64/libgdk-x11-2.0.so.0 #15 0x00007ffff5ab0984 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0 #16 0x00007ffff5ab0bc8 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0 #17 0x00007ffff5ab0c6c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0 #18 0x00007ffff4855fbd in gtk_main_iteration_do () from /usr/lib64/libgtk-x11-2.0.so.0 #19 0x0000000000483f78 in nsgtk_poll () #20 0x000000000046be0e in netsurf_main_loop () #21 0x0000000000484f8e in gui_init () #22 0x0000000000429fef in main () (gdb)