Roslyn: Unloading a project freezes Visual Studio forever

[vasily-kirichenko]

VS 2017 RC4.

1. Load a solution (https://github.com/Microsoft/visualfsharp/blob/master/VisualFSharp.sln in my case)
2. Unload a project (https://github.com/Microsoft/visualfsharp/blob/master/src/fsharp/FSharp.Compiler/FSharp.Compiler.fsproj in my case)
3. VS hangs forever, no CPU load

Dump is here https://drive.google.com/open?id=0B8HLQUKik9VteUFrZ2NjMnRkSk0

[miloush]

My guess would be this is a dupe of #14479 .

[vasily-kirichenko]

@miloush no. That issue is fixed in RC4. This is a new one.

[miloush]

@vasily-kirichenko I can reproduce this one reliably in couple of recent builds, including 26206. The problem is in the linked files, and I have been told that's a dupe of #14479 several weeks ago. Why do you think it's fixed in RC4?

[miloush]

Also if you close the shared documents before unloading the project, it shouldn't repro, is that your experience too?

[vasily-kirichenko]

@miloush yes, the projects I'm working on have lots of linked documents, almost all of docs are linked. Unfortunately, I cannot reproduce it on my home machine, either having the docs open or closed.

[vasily-kirichenko]

Why do you think it's fixed in RC4?

Because the solution I'm working on freezed VS on exit 100% of times in RC3, no single freeze on RC4 so far.

[miloush]

Interesting, my solution still freezes 100% of times on VS exit in RC4. Edit: So I just assumed it's not in yet. I am not sure what the relation is between closed issue - available in public build.

[Pilchie]

@dpoeschl Can you investigate?

[dpoeschl]

Fixed by https://github.com/dotnet/roslyn/pull/17372

[sergeykorolevsky]

I've faced this issue with last VS2017 version 15.5.6, OS - Win8.1

[vasiliy-kuznetsov]

The same issue, VS2017 15.6.4, Win 10.

[Pilchie]

Can those of you hitting this issue in 15.6 use VS's "report a problem" from a second instance of VS to record it while hung and report it? That should give us actionable memory dumps to investigate.

Go ahead and link the resulting developer community issues here too.

[levu74]

Still face the issue on 15.7.1 if having nested solution folders.

[Dogrtt]

Face the issue on 16.3.1 when I closed my UE4 project...

[JaydenMaalouf]

@Dogrtt Exactly the same here. I followed the answer posted here and it worked wonders. It does suck if I ever need the service though.

[mlop3s]

I have the same issue since months, with all updates. I've created two dumps over ~ 2GB. On both days when it happened.

Microsoft Visual Studio Enterprise 2019
Version 16.7.5

Mainly it happens on my mixed native C++ C# solution with over 80 projects.
I can make it available if needed. Let me know.

Cheers

[CyrusNajmabadi]

@mlop3s please open a new issue and include information about what build you have as well as links to the dumps. Ideally, of you can provide a link to the single
Solution as well that would be helpful.