похоже libass не нравится новая версия freetype Program received signal SIGBUS, Bus error.
0x00000008057ad900 in ft_new_glyph (source=0x8153ffb50, target=0x7fffffff8160) at /a/freetype-2.4.0/src/base/ftglyph.c:290
290 if ( !FT_ALLOC( glyph, clazz->glyph_size ) )
(gdb) bt f
#0 0x00000008057ad900 in ft_new_glyph (source=0x8153ffb50, target=0x7fffffff8160)
at /a/freetype-2.4.0/src/base/ftglyph.c:290
memory = <error reading variable memory (Cannot access memory at address 0x8000001c8)>
error = 3
glyph = 0x0
#1 FT_Glyph_Copy (source=0x8153ffb50, target=0x7fffffff8160) at /a/freetype-2.4.0/src/base/ftglyph.c:330
copy = 0x0
error = <value optimized out>
clazz = 0x4021271529907abf
#2 0x00000000006db2fc in get_bitmap_glyph (render_priv=0x801927500, event=0x804e290a0, event_images=0x801857050) at ass_render.c:1141
glyph = 0x0
outline = 0x0
hash_val = {
bm = 0x7fffffffa650,
bm_o = 0x7fffffff8280,
bm_s = 0x1d00000000
}
fax_scaled = <value optimized out>
error = <value optimized out>
fay_scaled = <value optimized out>
val = <value optimized out>
key = 0x8194070e0
...