err:keyboard:X11DRV_ToUnicode no char for keysym FE20 (ISO_Left_Tab)

[Paul McNett]

Who understands how to implement ISO_Left_Tab? (I looked at the source but it is way over my head):

err:keyboard:X11DRV_ToUnicode Please report: no char for keysym FE20 (ISO_Left_Tab) :
err:keyboard:X11DRV_ToUnicode (virtKey=9,scanCode=F,keycode=17,state=11)

TIA!