#0  slotLoadCB (slot=0x141ec60, size=0x141eec0, glyph_index=65, load_flags=514)
    at ftsymfontfile.cpp:479
#1  0x00007f979fa0e590 in FT_Load_Glyph (face=0x1414770, glyph_index=65,
    load_flags=514) at ftobjs.c:669
#2  0x00007f979c15f56a in _cairo_ft_scaled_glyph_init (
    abstract_font=0x14258a0, scaled_glyph=0x1425d00,
    info=CAIRO_SCALED_GLYPH_INFO_METRICS) at cairo-ft-font.c:1940
#3  0x00007f979c13ca75 in _cairo_scaled_glyph_lookup (scaled_font=0x14258a0,
    index=65, info=CAIRO_SCALED_GLYPH_INFO_METRICS,
    scaled_glyph_ret=0x7fffc551d560) at cairo-scaled-font.c:2373
#4  0x00007f979c13d617 in _cairo_scaled_font_glyph_device_extents (
    scaled_font=0x14258a0, glyphs=0x7fffc551dfb0, num_glyphs=1,
    extents=0x7fffc551d5f0) at cairo-scaled-font.c:1746
#5  0x00007f979c143440 in _cairo_surface_fallback_show_glyphs (
    surface=0x1405da0, op=CAIRO_OPERATOR_OVER, source=0x1425c50,
    glyphs=0x7fffc551dfb0, num_glyphs=1, scaled_font=0x14258a0)
    at cairo-surface-fallback.c:1000
#6  0x00007f979c13fcfe in _cairo_surface_show_text_glyphs (surface=0x1405da0,
    op=CAIRO_OPERATOR_OVER, source=<value optimized out>, utf8=0x0,
    utf8_len=0, glyphs=0x7fffc551dfb0, num_glyphs=1, clusters=0x7fffc551d7b0,
    num_clusters=0, cluster_flags=0, scaled_font=0x14258a0)
    at cairo-surface.c:2325
#7  0x00007f979c128ea5 in _cairo_gstate_show_text_glyphs (gstate=0x13feb10,
    utf8=0x0, utf8_len=0, glyphs=0x1575410, num_glyphs=1,
    clusters=<value optimized out>, num_clusters=0, cluster_flags=0)
    at cairo-gstate.c:1657
#8  0x00007f979c1232d7 in cairo_show_glyphs (cr=0x13feae0,
    glyphs=<value optimized out>, num_glyphs=<value optimized out>)
    at cairo.c:3170