Thread 1 "ArdourGUI" received signal SIGSEGV, Segmentation fault. 0x0000555555ffbba4 in Temporal::MapOwned::map (this=0x555665bdfde8) at ../libs/temporal/temporal/tempo.h:71 71 TempoMap const & map() const { return *_map; } (gdb) where #0 0x0000555555ffbba4 in Temporal::MapOwned::map() const (this=0x555665bdfde8) at ../libs/temporal/temporal/tempo.h:71 #1 0x00007ffff58f82b6 in Temporal::TempoMetric::reftime() const (this=0x7fffffffcb70) at ../libs/temporal/tempo.cc:642 #2 0x0000555555ee423d in Temporal::TempoMetric::round_to_bar(Temporal::BBT_Time const&) const (this=0x7fffffffcb70, bbt=...) at ../libs/temporal/temporal/tempo.h:502 #3 0x000055555644fa6c in Temporal::TempoMap::round_to_bar(Temporal::BBT_Argument const&) const (this=0x555565bdfd50, bbt=...) at ../libs/temporal/temporal/tempo.h:859 #4 0x000055555644d150 in MiniTimeline::render(Cairo::RefPtr const&, _cairo_rectangle*) (this=0x555557d5c238, ctx=...) at ../gtk2_ardour/mini_timeline.cc:609 #5 0x00007ffff5380ac4 in CairoWidget::on_expose_event(_GdkEventExpose*) (this=0x555557d5c238, ev=0x7fffffffd460) at ../libs/gtkmm2ext/cairo_widget.cc:209 #6 0x00007ffff4534459 in Gtk::Widget_Class::expose_event_callback(_GtkWidget*, _GdkEventExpose*) () at /lib/x86_64-linux-gnu/libgtkmm-2.4.so.1 #7 0x00007ffff4a914d7 in () at /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 #8 0x00007ffff4f1ed2f in g_closure_invoke () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #9 0x00007ffff4f3a624 in () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #10 0x00007ffff4f3c026 in g_signal_emit_valist () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #11 0x00007ffff4f3c863 in g_signal_emit () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0 #12 0x00007ffff4bbd024 in () at /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 #13 0x00007ffff4a911c3 in gtk_main_do_event () at /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 #14 0x00007ffff48dc4c9 in () at /lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 #15 0x00007ffff48dc449 in () at /lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 #16 0x00007ffff48dc449 in () at /lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 #17 0x00007ffff48d2155 in () at /lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 #18 0x00007ffff48d28e8 in gdk_window_process_all_updates () at /lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 #19 0x00007ffff48d298d in () at /lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 #20 0x00007ffff48ae409 in () at /lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 #21 0x00007ffff4e25c44 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #22 0x00007ffff4e7a6c8 in () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #23 0x00007ffff4e252b3 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #24 0x00007ffff4a8e2d2 in gtk_main () at /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 #25 0x00007ffff53993fe in Gtkmm2ext::UI::run(Receiver&) (this=0x555557d57cf0, old_receiver=...) at ../libs/gtkmm2ext/gtk_ui.cc:309 #26 0x00005555563a7c8f in main(int, char**) (argc=1, argv=0x7fffffffdb98) at ../gtk2_ardour/main.cc:469