Steps to reproduce

1. delete a line with 'dd'
   The listener_add() callback receives:
   {"lnum":1,"col":1,"added":-1,"end":2}

2. undo with 'u'
   The listener_add() callback receives:
   {"lnum":1,"col":1,"added":-1,"end":2}
{"lnum":1,"col":1,"added":1,"end":1}

Expected behaviour

The undo operation should NOT report a line deleted (2nd line of original file).
The net number of added & deleted lines should be zero. In this case, the net is 1 deleted line.

Routines tracking changes will erroneous delete the 2nd line of the original file.

Version of Vim

VIM - Vi IMproved 9.2 (2026 Feb 14, compiled Feb 14 2026 12:17:29)

Environment

Operating System: Windows 11

Logs and stack traces