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    <head>
      <base href="https://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed"
   href="https://llvm.org/bugs/show_bug.cgi?id=28566">28566</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>lld
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>COFF
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>compnerd@compnerd.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=16747" name="attach_16747" title="reduced.zip">attachment 16747</a> <a href="attachment.cgi?id=16747&action=edit" title="reduced.zip">[details]</a></span>
reduced.zip

Since I dont know how to get a reproduction case generated ...

lld -flavor link reduced.obj swiftMSVCRT.lib -out:reduced.exe -verbose
-subsystem:console -entry:mainCRTStartup

The necessary implib is in the attached tarball along with the reduced object
and source for generating it.

The implib was generated using lib via:

lib /arch:x86 /def:swiftMSVCRT.def /out:swiftMSVCRT.lib

The def file is also in the archive.</pre>
        </div>
      </p>
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