Constant TYPE_RUN_KEYSYMS 

const TYPE_RUN_KEYSYMS: usize = 8;

Distinct characters a type request binds and types at a time: each run’s binds then fit the seat’s text spares (keymap::TEXT_SPARE_KEYCODES; 9 free on a Japanese layout, 11 on most), on which every client types, where a bind past them lands above 255 and Chromium drops it.