Report it as a bug to Episerver, here

I had that problem as well, downgraded to a clean VS 2015. I verifed today that this issue is still present in Update 2 unfortunately. Except for Episerver Forms this also happens with Episerver Google Analytics I think.

Strange but can report I have a site with forms and google and update 2 and it is working with updating nugets. Did an update today. Though I have experienced other fun things with nuget and VS2015. I had a custom nuget feed that only worked with VPN connection. If the VPN was not there I could not update any episerver nugets at all only the once that comes from the "builtin" feeds. Once disabled the updates and installations works again.

So for 3 months I actually updated and installed all my projects in VS2013 :) It handled the feeds much better even if the feeds was not available.

We are looking on this. Thank you.
Forms nuget package is quite clean and safe, contain nothing but images, JS, aspx, ... and dll. We even avoid to put .ps1 script into add-on packages.

PS: and if our nuget package can crash the Visual Studio, I think I would file a bug to Microsoft VS team :)

Can you get dump from VS crash?

Yeah I don't think this has anything to do with Episerver, it's a Microsoft issue.

Looks like it's a VS/Windows bug, and that it just happened to reveal itself in combination with en Epi package. Anyhow, the problem is only ln my stationary workstation and not on my laptop, even though thw run the same OS and VS version.

Thanks for all the feedback!