Comment 2 for bug 1507490

StacktraceTop:
 gtk_text_iter_make_real (_iter=_iter@entry=0x7ffe0954d470) at /build/buildd/gtk+3.0-3.14.13/./gtk/gtktextiter.c:213
 gtk_text_iter_forward_to_tag_toggle (iter=iter@entry=0x7ffe0954d470, tag=0x119e6b0) at /build/buildd/gtk+3.0-3.14.13/./gtk/gtktextiter.c:4189
 smart_forward_search_async_step (wrapped_around=<synthetic pointer>, start_at=0x7ffe0954d420, search=0x11e1480) at gtksourcesearchcontext.c:1008
 smart_forward_search_async (search=search@entry=0x11e1480, start_at=start_at@entry=0x7ffe0954d650, wrapped_around=wrapped_around@entry=0) at gtksourcesearchcontext.c:1099
 gtk_source_search_context_forward_async (search=search@entry=0x11e1480, iter=iter@entry=0x7ffe0954d650, cancellable=cancellable@entry=0x0, callback=callback@entry=0x441bc0 <start_search_finished>, user_data=user_data@entry=0xfee5c0) at gtksourcesearchcontext.c:3254