title: Downloading a Nuget package is giving the error "Package contains an entry which is unsafe for extraction" why?
body: <p>We are running a private nuget repository. Our build server creates nuget packages from a couple of our framework projects and copy these packages into the repository.
  As of today we are receiving a weird error from nuget when we try to restore some packages.</p>
  
  <p><code>The package '[package name here]' contains an entry which is unsafe for extraction.</code></p>
  
  <p>Unfortunately I didn't find anything in google that was able to assist me.</p>
  
  <p>My question is: What in a nuget package is considered being unsafe for extraction? Is there a list of entries, that must not be part of a package? </p>
  
  <p>The package of the current version looks like the package of the previous versions, which still can be retrieved via the nuget manager.
  Or is this something that came along with the latest visual studio patch for 15.8.2?</p>
  
  <p>** <strong>* UPDATE *</strong> **
  In the meanwhile we found out, that the problem appears in package manager <code>4.8.0.5385</code>. In versions <code>4.7.*</code> everything is working as expected. On <a href="https://www.nuget.org/downloads" rel="noreferrer">nuget.org</a> the latest <em>recommended</em> version of nuget.exe is 4.7.1! Unfortunately one doesn't have the option to opt out from updating the version, because it installed with the latest Visual Studio Patch for 15.8.2</p>