segfault when adding the first note to a new topic

Backtrace:

Program received signal SIGSEGV, Segmentation fault.
0x0805191e in footnote_widgets_category_add_note (self=0x82e44e0, n=0x81c0630) at /home/allen/Projects/footnote/build/src/Widgets/Category.c:1812
1812 _tmp3_ = _tmp2_->view_note;
(gdb) bt
#0 0x0805191e in footnote_widgets_category_add_note (self=0x82e44e0, n=0x81c0630) at /home/allen/Projects/footnote/build/src/Widgets/Category.c:1812
#1 0x0805d7e9 in action_new_note () at /home/allen/Projects/footnote/build/src/Footnote.c:1186
#2 0x0805a95c in _action_new_note_gtk_action_callback (action=0x8081970, self=0x80930e0) at /home/allen/Projects/footnote/build/src/Footnote.c:221
#3 0xb774a14c in g_cclosure_marshal_VOID__VOID () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#4 0xb7748c3c in g_closure_invoke () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#5 0xb775b9f0 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#6 0xb7764787 in g_signal_emit_valist () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#7 0xb77648f3 in g_signal_emit () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#8 0xb7b6f406 in ?? () from /usr/lib/libgtk-3.so.0
#9 0xb7b6fb9d in gtk_action_activate () from /usr/lib/libgtk-3.so.0
#10 0xb7d617be in ?? () from /usr/lib/libgtk-3.so.0
#11 0xb774a14c in g_cclosure_marshal_VOID__VOID () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#12 0xb7748c3c in g_closure_invoke () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#13 0xb775b9f0 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#14 0xb7764787 in g_signal_emit_valist () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#15 0xb77648f3 in g_signal_emit () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#16 0xb7b9387a in gtk_button_clicked () from /usr/lib/libgtk-3.so.0
#17 0xb7b94bb8 in ?? () from /usr/lib/libgtk-3.so.0
#18 0xb774a14c in g_cclosure_marshal_VOID__VOID () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#19 0xb774768d in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#20 0xb7748c3c in g_closure_invoke () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#21 0xb775b1b7 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#22 0xb7764787 in g_signal_emit_valist () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#23 0xb77648f3 in g_signal_emit () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#24 0xb7b9379a in gtk_button_released () from /usr/lib/libgtk-3.so.0
#25 0xb7b937e4 in ?? () from /usr/lib/libgtk-3.so.0
#26 0xb7c6a1a2 in ?? () from /usr/lib/libgtk-3.so.0
#27 0xb774768d in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#28 0xb7748c3c in g_closure_invoke () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#29 0xb775b838 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#30 0xb7764599 in g_signal_emit_valist () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#31 0xb77648f3 in g_signal_emit () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
#32 0xb7dba4c3 in ?? () from /usr/lib/libgtk-3.so.0
#33 0xb7c698e2 in gtk_propagate_event () from /usr/lib/libgtk-3.so.0
#34 0xb7c69d48 in gtk_main_do_event () from /usr/lib/libgtk-3.so.0
#35 0xb7ab313c in ?? () from /usr/lib/libgdk-3.so.0
#36 0xb7adaec8 in ?? () from /usr/lib/libgdk-3.so.0
#37 0xb768025f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#38 0xb7680990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#39 0xb7680f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#40 0xb7c68f95 in gtk_main () from /usr/lib/libgtk-3.so.0
#41 0x0805d90b in _vala_main (args=0xbffff374, args_length1=1) at /home/allen/Projects/footnote/build/src/Footnote.c:1230
#42 0x0805d939 in main (argc=1, argv=0xbffff374) at /home/allen/Projects/footnote/build/src/Footnote.c:1237
(gdb)