QtCreator crashes randomly when searching through the whole source code

Hi

Simply searching through the whole source code causes crashing after a few seconds. Open the global search in the project, and search for something. After I clicked "search" there, and went through the results, it crashed. For me I started noticing this at 4.15.1, but I don't know if it's been there before. This is on Debian Buster.

If you'd like to open the same project I've been working on, you can find it here on github. Simply open the cmake file on Linux and you can try this (just comment one line in the cmake file that I added to prevent non-devs to open the project, or define env var NEBLIO_CMAKE=1). I'm not sure whether it's just the project I'm working on that's cursed.

Thanks.