Description of the Issue

Notepad++ stuck and trying to eat all available RAM when using “Remove Non-Bookmarked Lines”.

Steps to Reproduce the Issue

1. Open some text file, in my case it's IIS log file (52Mb or 139231 in lines).
2. Find > Mark > check “Bookmark line” write some text to find and click “Mark All”, in my case I search “10.212.136.1” and it’s marked 315 lines.
3. Search > Bookmark > “Remove Non-Bookmarked Lines” - now Notepad++ get stuck and trying to eat all available RAM.

Debug Information

Notepad++ v8.5.1 (64-bit)
Build time : Mar 21 2023 - 19:16:10
Path : C:\1\npp.8.5.1.portable.x64\notepad++.exe
Command Line :
Admin mode : OFF
Local Conf mode : ON
Cloud Config : OFF
OS Name : Windows 11 Pro (64-bit)
OS Version : 22H2
OS Build : 22621.1413
Current ANSI codepage : 1251
Plugins :
mimeTools (2.9)
NppConverter (4.5)
NppExport (0.4)

This bug in Notepad++ version 8.4.6 - 8.5.1, 8.4.5 work fine.