Hello the bug seems to be fixed.
I can reproduce the crash in 2.83 Beta (Date 2020-05-15)
And the crash doesn't happen with Blender 2.83.2 .

The simple script has already been provided (see history of this conversation : May 25, 3 PM)
And (May 28 6 PM) -> you can download the zip with the code inside...

I tested on Linux. It works on my Linux.... but not on my Windows 10....
Can you test on Windows ?

Yes it works if you run it outside of an operator.
But, as described in my previous message, it crashes when launched inside an operator execute() method. (at least on my computer with 2.83 and 2.90)
I attached an addon which allows to reproduce the crash.
(put it in the scripts/addons folder, enable it in the Prefs / Addons, hit 'N', open the QRTestCrash tab, click on <<Remesh It>>)

Here is a simple script that crashes Blender 2.83 and 2.90:
I call this function in the execute() function of an operator.
Just call it with the cube which is created when Blender starts.