Bug report

Bug description:

To reproduce

Tested with Python 3.14 rc3 on Linux

1. Open the new REPL
2. Paste: ééééé

The paste-able string above is five letter 'e's each followed by \u0301. To create it use:

print('e\u0301' * 5)

The \u0301 is a combining mark with zero-width display length

Current behavior

The cursor position is five spaces after the pasted string

Expected behavior

The cursor position is immediately after the pasted string

CPython versions tested on:

3.14

Operating systems tested on:

Linux

Linked PRs

• gh-139246: zero-width word paste can be wrong in default repl #139254
• [3.14] gh-139246: zero-width word paste can be wrong in default repl (GH-139254) #140796
• [3.13] gh-139246: zero-width word paste can be wrong in default repl (GH-139254) #141166