Broken: 2.80, 02581a7ef819, 2019-02-08
Short description of error
If you leave object A in weight paint mode by making object B the active object, then you enter weight paint mode on object B and use Smooth Vertex Groups operator, the operator will also affect object A.
Exact steps for others to reproduce the error
In attached blend:
- execute the Smooth Vertex Weights operator
- increase number of iterations to better see the issue
- notice how the deselected objects' weights are getting smoothed. (Those objects are in weight paint mode)
Other weight operators may be affected. I tried the Clean Vertex Groups operator, it didn't seem to be affected.