StacktraceTop: g_assertion_message (domain=0x282687b "Gtk", file=0x28e08b0 "/build/buildd/gtk+3.0-3.1.12/./gtk/gtktoolbar.c", line=3904, func=0x28e0ce0 "gtk_toolbar_get_visible_position", message=<optimized out>) at /build/buildd/glib2.0-2.29.16/./glib/gtestutils.c:1425 g_assertion_message_expr (domain=0x282687b "Gtk", file=0x28e08b0 "/build/buildd/gtk+3.0-3.1.12/./gtk/gtktoolbar.c", line=3904, func=0x28e0ce0 "gtk_toolbar_get_visible_position", expr=0x282d1b0 "count.found") at /build/buildd/glib2.0-2.29.16/./glib/gtestutils.c:1436 gtk_toolbar_get_visible_position (child=0x8ccbde8, toolbar=0x86b1310) at /build/buildd/gtk+3.0-3.1.12/./gtk/gtktoolbar.c:3904 gtk_toolbar_get_path_for_child (container=0x86b1310, child=0x8ccbde8) at /build/buildd/gtk+3.0-3.1.12/./gtk/gtktoolbar.c:3957 gtk_container_get_path_for_child (container=0x86b1310, child=0x8ccbde8) at /build/buildd/gtk+3.0-3.1.12/./gtk/gtkcontainer.c:3402
StacktraceTop: message (domain=0x282687b "Gtk", file=0x28e08b0 "/build/ buildd/ gtk+3.0- 3.1.12/ ./gtk/gtktoolba r.c", line=3904, func=0x28e0ce0 "gtk_toolbar_ get_visible_ position" , message=<optimized out>) at /build/ buildd/ glib2.0- 2.29.16/ ./glib/ gtestutils. c:1425 message_ expr (domain=0x282687b "Gtk", file=0x28e08b0 "/build/ buildd/ gtk+3.0- 3.1.12/ ./gtk/gtktoolba r.c", line=3904, func=0x28e0ce0 "gtk_toolbar_ get_visible_ position" , expr=0x282d1b0 "count.found") at /build/ buildd/ glib2.0- 2.29.16/ ./glib/ gtestutils. c:1436 get_visible_ position (child=0x8ccbde8, toolbar=0x86b1310) at /build/ buildd/ gtk+3.0- 3.1.12/ ./gtk/gtktoolba r.c:3904 get_path_ for_child (container= 0x86b1310, child=0x8ccbde8) at /build/ buildd/ gtk+3.0- 3.1.12/ ./gtk/gtktoolba r.c:3957 get_path_ for_child (container= 0x86b1310, child=0x8ccbde8) at /build/ buildd/ gtk+3.0- 3.1.12/ ./gtk/gtkcontai ner.c:3402
g_assertion_
g_assertion_
gtk_toolbar_
gtk_toolbar_
gtk_container_