Operating system: Linux-5.0.0-15-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 418.56
Broken: version: 2.80 (sub 72), branch: blender2.7, commit date: 2019-05-23 20:37, hash: rBb3f96da2e605
Short description of error
Cannot convert curve to mesh .
The issue arise when using an array but also without array.
Test the attached file and try to convert the object 'SpiralSupport' to mesh. Array ask that I convert to mesh. When I try to do it either the object disappear or just does not become a mesh..
Exact steps for others to reproduce the error
I create a beziercurve
did use a bezier circle to tapper it
did use also a bezier circle to bevel it.
Once I got the first object shaped as needed, I did pass it to an array modifier.
The duplication worked and then I needed to convert the 5 supports from curve to mesh.
That does not seem to work as the curve keeps existing even if I try to delete it.
[Based on an attached .blend file (as simple as possible)]