<html>
    <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 failed: !SpecializedTemplate.is&lt;SpecializedPartialSpecialization*&gt;() &amp;&amp; &quot;Already set to a class template partial specialization!&quot;" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23625&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=vQuIzh89-zTLwOKTpmjrHBgJaIWUjyF1fYlqxBfIEg8&s=5Lm5gr-c9pEMEpoH9m5BBi0zJ5PQl94wwvYGnWXpaUU&e=">23625</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Assertion failed: !SpecializedTemplate.is<SpecializedPartialSpecialization*>() && "Already set to a class template partial specialization!"
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>3.6
          </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>release blocker
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>C++
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>s_bugzilla@nedprod.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Proposed Boost.AFIO has been generating this assertion fail for some time on
clang's >= 3.4 on ARM and Windows that I know of. I had simply been recompiling
clang with assertions disabled or falling back to clang 3.3 and all is well,
however I saw Chandler at C++ Now last week and he got annoyed with me for not
reporting it. So here it is.

I see a number of bug reports with this exact same assertion fail. I'll link
them shortly.

On Windows using the binaries for clang 3.6 from the LLVM website:

Assertion failed: !SpecializedTemplate.is<SpecializedPartialSpecialization*>()
&& "Already set to a class template partial specialization!", file
D:\src\llvm_release_build_3.6.0-final\llvm\tools\clang\include\clang/AST/DeclTemplate.h,
line 1575
clang++.exe: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.6.0 (tags/RELEASE_360/final)
Target: i686-pc-windows-gnu
Thread model: posix
clang++.exe: note: diagnostic msg: PLEASE submit a bug report to
<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_bugs_&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=vQuIzh89-zTLwOKTpmjrHBgJaIWUjyF1fYlqxBfIEg8&s=yJSv3rhJIPePGqD2rJKCZsdwT0iVxtbEzeBMOgYddKA&e=">http://llvm.org/bugs/</a> and include the crash backtrace, preprocessed source, and
associated run script.
clang++.exe: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++.exe: note: diagnostic msg:
C:\Users\ned\AppData\Local\Temp\test_all-5f72f9.cpp
clang++.exe: note: diagnostic msg:
C:\Users\ned\AppData\Local\Temp\SpookyV2-32765c.cpp
clang++.exe: note: diagnostic msg:
C:\Users\ned\AppData\Local\Temp\test_all-5f72f9.sh
clang++.exe: note: diagnostic msg: 

********************</pre>
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
      
      <ul>
          <li>You are on the CC list for the bug.</li>
      </ul>
    </body>
</html>