| hindenburg |
| Konsole |
This behavior is present in e.g. xterm and linux console.
Currently when using CSI 2J escape sequence, screen contents are
appended to scrollback (including bottom empty lines). This is breaking
clear command, which replaces scrollback with current screen contents.
BUG: 384218
Expected result:
Cleared display, empty scrollback.
Actual result:
Cleared display, but scrollback contains previous display contents.
Expected result:
Cleared display, numbers in last scrollback lines.
Actual result:
Cleared display, but scrollback contains previous display contents
(i.e. shell prompt in last lines)
| Automatic diff as part of commit; lint not applicable. |
| Automatic diff as part of commit; unit tests not applicable. |
Note that ncurses devs recently decided to fix clear (https://bugzilla.gnome.org/show_bug.cgi?id=506438#c19), so on newer systems it will work even with current CSI2J behavior.
This lowers reasons behind this path to compatibility with clear in older systems and compatibility with xterm. If these goals are not important, the patch can be abandoned.