https://invisible-island.net/xterm/xterm.log.html#xterm_366 https://invisible-island.net/xterm/xterm.log.html#xterm_366 Specifically, the overflow is in the up

https://invisible-island.net/xterm/xterm.log.html#xterm_366 https://invisible-island.net/xterm/xterm.log.html#xterm_366 Specifically, the overflow is in the upper limit of the text selection buffer when characters are combined in UTF-8.