/* If frame size has changed or the window is newly mapped,
redisplay now, before we start to wait. There is a race
condition here; if a SIGIO arrives between now and the select
- and indicates that a frame is trashed, we lose. */
+ and indicates that a frame is trashed, the select may block
+ displaying a trashed screen. */
if (frame_garbaged)
redisplay_preserve_echo_area ();