bug#20628: 25.0.50; Incorrect line height for some fonts

[Oleh Krehel]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Oleh Krehel <ohwoeowho@gmail.com>
>> Cc: clement.pitclaudel@live.com,  20628@debbugs.gnu.org
>> Date: Fri, 22 May 2015 18:05:25 +0200
>> 
>> Eli Zaretskii <eliz@gnu.org> writes:
>> 
>> > Is your build optimized, per chance?  It works for me, FWIW.
>> 
>> How do I set it to non-optimized?
>
> Reconfigure like this:
>
>   CFLAGS='-O0 -g3' ./configure ...
>
> and then re-run "make".

Thanks, I'll try that.

>> So far I've tracked the bug to xftfont_open, where instead of the
>> usual
>> 
>>     font ascent: 14, descent: 5
>> 
>> I get for the 120755 char:
>> 
>>     font ascent: 54, descent: 46
>
> How is this strange character displayed, eventually?  Is it displayed
> as a character or as a box with its hex code?

It's displayed just the way gedit displays it, only with a huge (3 line
height) ascent and a huge (3 line height) descent. So the line with the
char is effectively 7 times taller than a regular line.

Also, I've tracked the font family of the char to be "Latin Modern
Mathfont" in xftfont_open.