Negative regex filename search does not work

[mdpenguin]

Distribution

Mint 22.3

Package version

6.6.3

Frequency

Always

Bug description

Negative regex searching doesn't work as expected using standard JavaScript RegExp notation

Steps to reproduce

1. Folder has more than one file: test.log and test.sh
2. Search for !h$, ^h$, !(sh$), or (?!sh$) to exclude test.sh
3. Note that no results are returned for the first three and all files are returned for the negative lookahead

Folder with both files:

Search for sh$ works as expected:

Negative searches don't work as expected:

Negative look ahead returns all files:

Expected behavior

Searching using negation returns everything but the negated pattern

Additional information

No response

[mtwebster]

Those don't all look valid - they look like bash globbing expressions, which aren't the same as regex.

try ^(?!.*sh$) to get files not ending in .sh

https://regexr.com/