On 2017.09.25 at 06:49 -0400, Alexei Podtelezhnikov wrote:
> Markus,
> 
> I appreciate that you run HEAD. May I ask to compile with debugging
> then? I hope and I don't think that they call an internal function
> directly.

Sure, sorry:

Thread 27 "CompositorTileW" received signal SIGSEGV, Segmentation fault.        
         
[Switching to Thread 0x7fffe322a700 (LWP 8439)]                                 
         
0x0000000000000001 in ?? ()                 
(gdb) bt                                    
#0  0x0000000000000001 in ?? ()             
#1  0x00007ffff768eefe in ft_smooth_render_generic (render=0x231588106000, 
slot=slot@entry=0x231588b33b00, mode=FT_RENDER_MODE_LCD, origin=<optimized 
out>,                            
required_mode=required_mode@entry=FT_RENDER_MODE_LCD) at 
/home/markus/freetype2/src/smooth/ftsmooth.c:321                                
                                      #2  0x00007ffff768f07e in 
ft_smooth_render_lcd (render=<optimized out>, slot=0x231588b33b00, 
mode=<optimized out>, origin=<optimized out>)                                   
          at /home/markus/freetype2/src/smooth/ftsmooth.c:463                   
               
#3  0x0000555558b0b297 in FT_Render_Glyph_Internal () 

(I will not build Chromium with debug info, because it is too big.)

Anyway this only happens if one builds Chromium with external Freetype.
The default (internal Freetype) works fine. So I will just switch to
that configuration.
Firefox and QT work fine with your patch.

-- 
Markus

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