"GameObject is active but a parent is inactive. Active state is now inherited." warnings

Hello.

Since upgrading my project to Unity 5 I've been getting the following console warning whenever loading some of my scenes (in edit or play mode):

GameObject is active but a parent is inactive. Active state is now inherited. Change the parenting to get back the old behaviour!​

(This was reported by others a couple of times in the beta forum, but since those threads are locked and I have a bit of new information I thought I'd make a post here too.)

Obviously the warning is a bit weird, because it's describing behavior that was new in Unity 4, but I've only been getting it since upgrading to Unity 5. I thought that maybe re-saving the scenes in Unity 5 would stop the warnings from appearing, but I've done so and that hasn't made any difference, so this seems like a bug to me.

I've tracked it down to occurring only for active instances of prefabs that have an inactive parent, and where the instance has an added component (any one seems to work) that is not on the prefab. Here's a screenshot of a setup that triggers it (note the bold 'Mesh' label showing that the Mesh Filter component wasn't on the prefab):

I've filed a bug with a minimal test project (the above setup) as case 679993, but I thought I'd post here for anyone else who's searching for a solution. Has anyone figured out a way of getting those warnings to go away?

 

I've submitted a very similar repro earlier and got a mail back a week ago that this has been fixed (in a future version I guess).

 

Oh great, I'm very glad to hear that. Thank you!

 

somehow this unlinked all my public variable for the prefab in question =[
which is my mainUI which has about 100. I just have to reassign em, but it's a bummer.

 

This was fixed in 5.0.0p2. From the release notes:

You have to re-save your scenes that were giving the warnings, and then loading them again is fine!