MsBuild causing blocking on UI thread in a variety of situations

[cloudRoutine]

Switching between build configurations and trying to build the solution while there are errors in a source file are consistently locking up VS where it's faster to kill the process and restart than to wait for the thread to unblock.

I ran a trace just on switching between debug and release in VS 2017

^ that's a 3.8 min block on the UI thread

Please provide a succinct description of the issue.

Repro steps

Configuration Blocking

1. Switch Build Configurations

Build Blocking

1. introduce errors in .\vsintegration\src\FSharp.LanguageService\XmlDocumentation.fs
2. try to build

Expected behavior

VS 2017 doesn't lock

Actual behavior

UI Locks that last for several minutes.

Known workarounds

Kill Process and Restart

Related information

Provide any related information

• Operating system - Win 10
• Branch - master
• .NET Runtime
• Visual Studio Version 2017

[vasily-kirichenko]

Yes, this issue is terribly annoying. TBH, it's here since VS 2012, maybe earlier.

[dsyme]

@cloudRoutine Any chance you could grab some relevant call stacks?

[saul]

This was resolved in #2133 - this can be closed.