Bug ID: 1312500
Summary: Incorrect rendering (overlapping characters) of some
character combinations involving diacritics(?)
QA Contact: extras-qa(a)fedoraproject.org
CC: ccecchi(a)redhat.com, fonts-bugs(a)lists.fedoraproject.org
So we'll need to do a bit more triage on this one, but I'm busy right now so
just want to file it. Today's openQA French install test for Rawhide failed.
The failure seems to be caused by some messed-up rendering of particular
character combinations. Here's the failed step:
Note the incorrect rendering of the message above the "Redémarrer" (reboot)
button, which is:
"Fedora est maintenant installé avec succès et est prêt à être utilisé !"
This text contains the two character sequence "êt" twice, and both times, it is
incorrectly rendered - the characters are overlapped.
A similar issue can be observed on the main hub:
with the text "NOM D'HÔTE ET RÉSEAU" - the ÔT sequence is similarly
As I'm writing this bug report, I've become pretty sure the bug is in
Cantarell. If I paste the text êt into gedit (where my font is DejaVu Sans
Mono) it renders fine. If I then change gedit's font to Cantarell it displays
incorrectly (overlapped, like in the screenshots). If I change to another
proportional font it also renders fine. So this seems like an error in
cantarell. It also affects â and ô and ü and Ô and a few others, but not î or
û. In gucharmap the affected characters actually display off-centre within the
boxes in the character table, so you can see which characters are affected
quite easily. Basically it seems like these characters are not correctly placed
in the glyph grid or whatever it's called - they're nearly a whole
width to the right of where they should be.
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