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    <head>
      <base href="http://llvm.org/bugs/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - MS ABI: Assertion failed: CXXInfo->BaseOffsets.count(Base) && "Did not find base!""
   href="http://llvm.org/bugs/show_bug.cgi?id=21064">21064</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>MS ABI: Assertion failed: CXXInfo->BaseOffsets.count(Base) && "Did not find base!"
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

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

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

        <tr>
          <th>OS</th>
          <td>Windows NT
          </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>LLVM Codegen
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>david.majnemer@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>consider:
struct __declspec(dllexport) ClassName0 {};
struct __declspec(dllexport) ClassName1 : virtual ClassName0 {
  virtual void f();
};
struct __declspec(dllexport) ClassName2 : virtual ClassName0 {
};
struct __declspec(dllexport) ClassName3 : virtual ClassName1 {
};
struct __declspec(dllexport) ClassName4 : virtual ClassName2,
                                          virtual ClassName0,
                                          virtual ClassName3 {
};

compile with:
~/llvm/Release+Asserts/bin/clang++ -cc1 -x c++ t.cpp -triple i686-pc-win32
-fms-compatibility -fno-rtti -emit-obj -w -o -</pre>
        </div>
      </p>
      <hr>
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      <ul>
          <li>You are on the CC list for the bug.</li>
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