or edit.invalid1(State, State.cursor1)

      or edit.invalid_cursor1(State)

end
-- cursor loc in particular differs from other locs in one way:
-- pos might occur just after end of line
function edit.invalid_cursor1(State)
  local cursor1 = State.cursor1
  if cursor1.line > #State.lines then return true end
  local l = State.lines[cursor1.line]
  if l.mode ~= 'text' then return false end  -- pos is irrelevant to validity for a drawing line
  return cursor1.pos > #State.lines[cursor1.line].data + 1