Bug#880674: libpango-1.0-0: Thai word break stops working since 1.40.13

[Theppitak Karoonboonyanan]

On Fri, Nov 3, 2017 at 11:31 PM, Michael Biebl  wrote:
> Am 03.11.2017 um 17:25 schrieb Michael Biebl:
>
>> It's a known issue, see https://bugzilla.gnome.org/show_bug.cgi?id=789625
>
> Let me rephrase that a little: I'm pretty sure it's the same underlying
> issue and it would be great if you can give the patch in the upstream
> bug tracker a try.

Yes, I have tried it and I confirm that it fixes this bug, too.

Thanks,
-- 
Theppitak Karoonboonyanan
http://linux.thai.net/~thep/

Bug#880674: libpango-1.0-0: Thai word break stops working since 1.40.13

[Michael Biebl]

Am 03.11.2017 um 17:25 schrieb Michael Biebl:

> It's a known issue, see https://bugzilla.gnome.org/show_bug.cgi?id=789625

Let me rephrase that a little: I'm pretty sure it's the same underlying
issue and it would be great if you can give the patch in the upstream
bug tracker a try.


-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?



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Bug#880674: libpango-1.0-0: Thai word break stops working since 1.40.13

[Michael Biebl]

Control: forwarded -1 https://bugzilla.gnome.org/show_bug.cgi?id=789625
Control: tags -1 + patch

Am 03.11.2017 um 16:36 schrieb Jeremy Bicha:
> Control: severity -1 serious
> 
> On Fri, Nov 3, 2017 at 11:25 AM, Theppitak Karoonboonyanan
>  wrote:
>> Since Pango 1.40.13, Thai word break appears to be broken. This affects
>> all GTK+-based text editors like gedit, mousepad, leafpad, etc. as well as
>> Mozilla Firefox.
> 
> Thank you for your detailed bug report. Please forward this to GNOME
> and let us know the bug number here.
> 

It's a known issue, see https://bugzilla.gnome.org/show_bug.cgi?id=789625

The patch in the bug report seems to fix the issue but I'd wait until it
has been committed to git.



-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?



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Bug#880674: libpango-1.0-0: Thai word break stops working since 1.40.13

[Jeremy Bicha]

Control: severity -1 serious

On Fri, Nov 3, 2017 at 11:25 AM, Theppitak Karoonboonyanan
 wrote:
> Since Pango 1.40.13, Thai word break appears to be broken. This affects
> all GTK+-based text editors like gedit, mousepad, leafpad, etc. as well as
> Mozilla Firefox.

Thank you for your detailed bug report. Please forward this to GNOME
and let us know the bug number here.

Jeremy Bicha

Bug#880674: libpango-1.0-0: Thai word break stops working since 1.40.13

[Theppitak Karoonboonyanan]

Package: libpango-1.0-0
Version: 1.40.13-1
Severity: important

Dear Maintainer,

Since Pango 1.40.13, Thai word break appears to be broken. This affects
all GTK+-based text editors like gedit, mousepad, leafpad, etc. as well as
Mozilla Firefox.

Try, for example, opening this page with Firefox:

  https://linux.thai.net/~thep/text/aphaimanee.html

The long continuous-text paragraph is supposed to be wrapped, but it's not.

Downgrading Pango to 1.40.12 does solve the problem.

Looking at upstream repository, this commit looks like the culprit:

  
https://git.gnome.org/browse/pango/commit/?id=c4619480e536e393e2d4a8e26a6ceb5af1fe80e3

I've tried writing a simple program to test it, and it appears
PangoLogAttr::is_char_break for all Thai characters except the first
one of the line are cleared to zero, which causes break_thai() in
pango/break-thai.c to skip setting is_line_break in all positions.

-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'testing'), (1, 
'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.13.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=th_TH.utf8, LC_CTYPE=th_TH.utf8 (charmap=UTF-8), 
LANGUAGE=th_TH.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libpango-1.0-0 depends on:
ii  fontconfig2.12.3-0.2
ii  libc6 2.24-17
ii  libglib2.0-0  2.54.2-1
ii  libthai0  0.1.27-1

libpango-1.0-0 recommends no packages.

libpango-1.0-0 suggests no packages.

-- no debconf information