Bug 1296961

Description of problem:
Whilst using evince on fillable forms, crashes when type multi-line text into a text field that exceeds some arbitrary (and unknown buffer size).

Reproduce:-  
(1)download http://hmctsformfinder.justice.gov.uk/courtfinder/forms/n215-eng.pdf
(2) in the box marked "Give the address where service effected" on the right hand side, either type in, or cut and paste multi-line text:-
"1234 High Street,
District Place,
Anytown,
Anycounty,
England,
PO1 1AS"
(3) Click away from this box on to another field.
(4) Quickly click back, and try to manipulate the text, by clicking the cursor with the mouse to a location ont he text, and delete some letters, enter carriage return, add letters, etc.
(5) Randomly (presumably when a buffer overrun kicks in, I am guessing) it will crash after a few seconds.

Version-Release number of selected component:
evince-3.18.2-3.fc23

Additional info:
reporter:       libreport-2.6.3
backtrace_rating: 4
cmdline:        evince /tmp/mozilla_dominic0/n215-eng.pdf
crash_function: g_type_check_instance_is_a
executable:     /usr/bin/evince
global_pid:     4303
kernel:         4.2.8-300.fc23.x86_64
runlevel:       N 5
type:           CCpp
uid:            1003

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 g_type_check_instance_is_a at gtype.c:4020
 #1 gtk_text_mark_get_buffer at gtktextmark.c:348
 #2 selection_data_free at gtktextview.c:7442
 #3 g_datalist_clear at gdataset.c:273
 #5 gtk_text_view_finalize at gtktextview.c:3597
 #7 ev_view_forall at ev-view.c:7001
 #8 ev_view_button_press_event at ev-view.c:5062
 #9 _gtk_marshal_BOOLEAN__BOXEDv at gtkmarshalers.c:131
 #10 _g_closure_invoke_va at gclosure.c:864
 #13 gtk_widget_event_internal at gtkwidget.c:7692

Potential duplicate: bug 1295493