Bug 627248 – x11-libs/pango-1.40.7 pango_glyph_item_iter_next_cluster: assertion failed: (iter->start_char < iter->end_char)

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Eric Benoit 2017-08-07 16:31:50 UTC]

This is mostly for the sake of anyone else encountering the same error. I've already discovered and reported on the issue upstream:

https://bugzilla.gnome.org/show_bug.cgi?id=785946

It concerns seemingly random crashes, in my case with xfce4-terminal, with:

pango_glyph_item_iter_next_cluster: assertion failed: (iter->start_char < iter->end_char)

This was being triggered by certain unicode sequences, specifically a bit of unicode art.

It appears an extra line of debug code snuck into the tarball. A new release is expected shortly to address the issue.

[Comment 1 Jonas Stein 2017-08-10 10:53:53 UTC]

Thank you. Upstream released a fixed version.

[Comment 2 Gilles Dartiguelongue (RETIRED) 2017-08-11 07:20:20 UTC]

Just pushed pango-1.40.9 to the tree, please confirm it fixes your issue.

[Comment 3 Eric Benoit 2017-08-11 20:04:54 UTC]

It does indeed. 

xfce4-terminal now behaves itself with the previously mentioned unicode sequence, and a visual on the tarball shows the culpable bit of code removed.

Thanks!

[Comment 4 Gilles Dartiguelongue (RETIRED) 2017-08-11 21:45:15 UTC]

Thanks for the heads up.