`Find and Replace` / `Use Regular Expressions` / `Replace All`: reference groups are NOT handled correctly

[kuraga]

Description

On Find and Replace, using Regular Expressions, using Replace All,
reference groups are NOT handled correctly.

Reproduce

1. Create a Jupyter notebook.
2. Type in the first cell:

{
    'var1': 123,
    'var2': 456,
}

3. Open the Find and Replace dialog.
4. Roll out the Replace part.
5. Click the Use Regular Expressions button.
6. Type: : (\d+), at the Find input.
7. Type: : $1+1, at the Replace input.
8. Click the Replace All button.
9. Expected cell content:

{
    'var1': 123+1,
    'var2': 456+1,
}

10. Actual cell content:

{
    'var1': $1+1,
    'var2': $1+1,
}

At the same time, the Replace-button single replaces work as expected.

Expected behavior

On Find and Replace, using Regular Expressions, using Replace All,
reference groups are handled correctly.

Context

• Operating System and version: Calculate Linux (Gentoo-based)
• Browser and version: Chromium 129.0.6668.100, 64 bit
• Jupyter Notebook version: 7.2.2

[krassowski]

I can reproduce this. Using "Replace" button it works as expected, using "Replace All" it does not. FYI this is implemented in JupyterLab repo here:

https://github.com/jupyterlab/jupyterlab/blob/9cc6267d2e366390b861f725e5eca3ae04e86de9/packages/codemirror/src/searchprovider.ts#L399-L436

and replacing a single match is here:

https://github.com/jupyterlab/jupyterlab/blob/9cc6267d2e366390b861f725e5eca3ae04e86de9/packages/codemirror/src/searchprovider.ts#L330-L352

I do not immediately see where the error is. It would be good to also attempt reproducing in JupyterLab 4.3/Notebook 7.3 once these are released (soon).

[krassowski]

Heads up: the upstream issue was closed (jupyterlab/jupyterlab#16925) and fixes will be backported to 4.3.x

[kuraga]

Ok, thanks!

[jtpio]

Closing as fixed by jupyterlab/jupyterlab#16940 and available in Notebook 7.3.3.