title: No buildable go source files after update Goland to EAP 19
body: <p>After I updated <strong><a href="https://www.jetbrains.com/go/download/" rel="noreferrer">GoLand</a></strong> from <strong><em>EAP 18</em></strong> to <strong><em>EAP 19</em></strong> my imports are red and these errors occur in each file:</p>
  
  <p><a href="https://i.stack.imgur.com/cx7bu.png" rel="noreferrer"><img src="https://i.stack.imgur.com/cx7bu.png" alt="Import errors"></a></p>
  
  <p>My <em>$GOROOT</em> and <em>$GOPATH</em> are the same as before. <em>$GOROOT</em> points to <code>/usr/local/go.</code> Files are buildable through shell but GoLand keep showing errors.</p>
  
  <p>I am running GoLand on Mac OS with <strong>Go version</strong> <code>go1.9.1 darwin/amd64</code>:</p>
  
  <blockquote>
    <p>GoLand (1.0 Preview) 1.0 EAP
    Build #GO-173.3727.24, built on November 16, 2017
    GoLand EAP User
    Expiration date: December 16, 2017
    JRE: 1.8.0_152-release-1024-b6 x86_64
    JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
    Mac OS X 10.12.6</p>
  </blockquote>