Comment 2 for bug 277926

Building a debug package and running it in gdb gives:

#0 0x43101ae4 in Gtk::Tooltips::set_tip () from /usr/lib/libgtkmm-2.4.so.1
#1 0x0834573a in studio::Dockable::add_button (this=0xa0b8ed0, stock_id=@0xbfbe8cdc, tooltip=@0xbfbe8ce0) at dockable.cpp:331
#2 0x083316cb in Dock_MetaData (this=0xa0b8ed0) at dock_metadata.cpp:90
#3 0x08383e30 in App (this=0xbfbe90e0, argc=0xbfbe9130, argv=0xbfbe9134) at app.cpp:1137
#4 0x08358c13 in main (argc=1, argv=0xbfbe91b4) at main.cpp:101

IANAP, but shouldn't set_tip() be called with some variables?