Comment 1 for bug 1145326

(gdb) p sink->ascii_sink.font
$4 = (XFontStruct *) 0x0

and whole sink:
(gdb) p *sink
$5 = {
  object = {
    self = 0x637b20,
    widget_class = 0x7ffff7dd2140 <asciiSinkClassRec>,
    parent = 0x634270,
    xrm_name = 839,
    being_destroyed = 0 '\000',
    destroy_callbacks = 0x0,
    constraints = 0x0
  },
  text_sink = {
    foreground = 3225401,
    background = 15592941,
    tabs = 0x0,
    char_tabs = 0x0,
    tab_count = 0,
    cursor_color = 0,
    properties = 0x0,
    paint = 0x0,
    pad = {0x0,
      0x0}
  },
  ascii_sink = {
    font = 0x0,
    echo = 1 '\001',
    display_nonprinting = 1 '\001',
    normgc = 0x0,
    invgc = 0x0,
    xorgc = 0x0,
    cursor_position = 0,
    laststate = XawisOn,
    cursor_x = 0,
    cursor_y = 0,
    pad = {0x0,
      0x0,
      0x0,
      0x0}
  }
}