**System Information**
Operating system: Kubuntu 18.04
Graphics card: GTX1080Ti / GTX690
**Blender Version**
Broken:
example: 2.80, 957b4547aeeb, blender2.8, 2018-12-28, as found on the splash screen
Worked: 2.79
**Short description of error**
Drivers that reference custom properties do not update correctly.
If the custom property value is smaller than 1, it updates the driver to 0.
If the custom property value is bigger or equal to 1, it updates the driver to 1.
**Exact steps for others to reproduce the error**
Open a new blender file.
Create a custom property on the Default Cube Object. Increase its hard limits.
Make a driver for X location. Use single property for variable and reference the custom property by path.
Slide the custom property. X only updates to x=0 or x=1
Try in 2.79. X updates exacty to the value of the custom property.
{F6438427}
{F6438426}