[Willow Web Workload] Creating Razor v3 WSP hangs

[rrelyea]

Tracking TFS Bug: 245277:[Willow Web Workload] Creating Razor v3 WSP hangs

Likely want fix in dev and release-3.5.0-rc branches.

[joelverhagen]

Repro steps:

1. VS15 Willow install, build 15.0.25527.0
2. NuGet 3.5.0.1657
3. File > New Website
4. ASP.NET Web Site (Razor v3)

The template wizard hangs when installing Microsoft.Net.Compilers (version 1.0.0) to the website.

[joelverhagen]

More details.

• We have only been able to repro it on one VM and only on one user under that VM (@joeloff). A different user on the same VM did not repro.
• The VM was Windows 10 Enterprise (build 10240), 32-bit OS. 2 cores with 4 GB RAM.

The project creation seemed to hang in NuGet code while adding binding redirects.

The issue was fixed on @joeloff's profile by clearing the MEF cache (instructions followed).

Since we cannot repro on any other machine and clearing the MEF cache fixed the problem, we are thinking this is some bad MEF state that cannot be hit by customers. Therefore, we are closing this bug but keeping the VM snapshot around just in case this problem crops up again.