System Information
Operating system: Windows 10 Corporative x64
Graphics card: NVIDIA GeForce RTX 2060 Super
+32Gb RAM

Blender Version
Broken: 2.90, 0330d1af29c0, master, 2020-08-31 (STEAM version)
list of enabled addons is below

Short description of error
Blender crushes when I try to delete last capital letter in text (written in RU) while text is being along the curve.

Exact steps for others to reproduce the error

1. Add TEXT, change font on Consolab.ttf (Consolas type, it is in default set of Win fonts) as Regular in txt properties.
2. in Edit Mode delete default "TEXT" and write "АБВГД" (ABCDE in RU).
3. in Object Mode add Circle. In Edit mode in top view delele right 10 vertexes.
4. In Object Mode make Curve from Mesh (from Circle).
5. in txt properties pin text along curve "Circle".
6. Select Text, choose in Edit Mode, delete 4 letters of 5.
7. Delete last one and... crush.

Community Addons enabled:
Measurelt
Curve: Extra Objects
Archimesh
Mesh: Extra Objects
Dynamic Sky
Sun Position
F2
LoopTools
NodeWrangler
Bool Tool