Comment 2 for bug 844084

StacktraceTop:
 is_end (iter=0x50e6f00) at /build/buildd/glib2.0-2.29.18/./glib/gsequence.c:198
 g_sequence_get (iter=0x50e6f00) at /build/buildd/glib2.0-2.29.18/./glib/gsequence.c:1166
 dee_sequence_model_find_tag (self=0x37a62a0, iter=<optimized out>, tag=0x1, out_row_tag=0x7fff05b05370, out_tag=0x7fff05b05378) at dee-sequence-model.c:783
 dee_sequence_model_get_tag (self=0x37a62a0, iter=0x50e6f00, tag=0x1) at dee-sequence-model.c:640
 unity::dash::ResultRendererTile::IconLoaded (this=0x3da8400, texid=<optimized out>, size=<optimized out>, pixbuf=0x7f83fd212770, icon_name=<optimized out>, row=...) at /build/buildd/unity-4.12.0/plugins/unityshell/src/ResultRendererTile.cpp:333