[Fedora-i18n-bugs] [Bug 1036351] [abrt] gimp-2.8.8-3.fc19: pango_layout_iter_get_char_extents: Process /usr/bin/gimp-2.8 was killed by signal 8 (SIGFPE)

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1036351

Nils Philippsen  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]
                   |                            |ect.org,
                   |                            |[e-mail]
                   |                            |ct.org, [e-mail]
          Component|gimp                        |pango
           Assignee|[e-mail]         |[e-mail]

--- Comment #11 from Nils Philippsen  ---
Looks like a division by zero here:

--- 8< --- pango/pango-layout.c:6098 -- pango_layout_iter_get_char_extents()
---
x0 = (iter->character_position * cluster_rect.width) / iter->cluster_num_chars;
--- >8 ---

The cluster_num_chars member is opaque to outside API users, so IMO has to be
set by pango itself:

--- 8< --- app/tools/gimptexttool.c:841 -- gimp_text_tool_draw_selection() ---
  iter = pango_layout_get_iter (layout);

gimp_draw_tool_push_group (draw_tool, fill_group);

do
    {
      if (! pango_layout_iter_get_run (iter))
        continue;

i = pango_layout_iter_get_index (iter);

if (i >= min && i < max)
        {
          PangoRectangle rect;
          gint           ytop, ybottom;

pango_layout_iter_get_char_extents (iter, &rect);
          pango_layout_iter_get_line_yrange (iter, &ytop, &ybottom);

rect.y      = ytop;
          rect.height = ybottom - ytop;

pango_extents_to_pixels (&rect, NULL);

gimp_text_layout_transform_rect (text_tool->layout, &rect);

rect.x += offset_x;
          rect.y += offset_y;

gimp_draw_tool_add_rectangle (draw_tool, TRUE,
                                        rect.x, rect.y,
                                        rect.width, rect.height);
        }
    }
  while (pango_layout_iter_next_char (iter));
--- >8 ---

Changing component to pango.