ubuntu18.04's libfreetype6 2.8.1 has a bug of rendering bitmap font

Bug #1769132 reported by widon1104 on 2018-05-04
This bug affects 7 people
Affects Status Importance Assigned to Milestone
freetype (Ubuntu)

Bug Description

ubuntu18.04's libfreetype6 version 2.8.1 has a bug of rendering bitmap font like ZFull gb, should be upgrade to version 2.9.
I checked libfreetype 2.9 fix this bug. I post this bug in:


there are some picture I grab for this bug:


Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in freetype (Ubuntu):
status: New → Confirmed
kevin335200 (kevin335200) wrote :

That's what it seems like in firefox

widon1104 (widon1104) wrote :

This bug affects multiple users, but why ubuntu do not upgrade freetype to 2.9.x?

This is the upstream issue:


I reported this bug about 1 year ago. The bug is introduced in

[base] Don't zero out allocated memory twice (#51816).

And fixed in:

Fix access to uninitalized memory (#52613).

[base] Fix bitmap emboldening.

To fix this problem, there are two ways:
(1) revert changes bd28952e
(2) merge e1090c60 and 3b88576b to current code base

I suggest (1) because it's simpler.

This is the patch that can directly put to "debian/patches-freetype" folder.

The attachment "fix_bitmap_emboldening.patch" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

tags: added: patch
Changed in freetype (Ubuntu):
importance: Undecided → Medium
Sebastien Bacher (seb128) wrote :

The new freetype version is in Ubuntu now, https://launchpad.net/ubuntu/+source/freetype/2.9.1-3

That doesn't resolve the issue in the stable series though. There has been only one report of the problem so far and little activity which suggests the issue is not impacting/annoying lot of users so probably a low priority one (are bitmap fonts commonly used? the upstream test case involves changing firefox configs to force the use of a specific fonts which doesn't sound like something users would usually do). Would still be nice to get fixed though so maybe a candidate to include with other fixes if a SRU is done to the LTS

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