Operating system: win 64
Graphics card: GeForce GTX 1050 Ti
Broken: 2.8, blender-2.80-191b8951f7af-win64, download 9 feb 2019
Short description of error
Using Circle Curve with Bezier Curve as bevel object. When converting Curve to Mesh blender crashes.
Exact steps for others to reproduce the error
See attached blend file.
The issue here is that there is a cyclic dependency.
The bevel object of the circle is the curve and the bevel object of the curve is the circle.
Just open the curves.blend file and set the bevel object of the curve to the circle and hit convert to mesh.