<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </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 - gcc8 <string> compilation failure"
   href="https://bugs.llvm.org/show_bug.cgi?id=36869">36869</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>gcc8 <string> compilation failure
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>6.0
          </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>C++
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>mib.bugzilla@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>I see this fail in godbolt clang trunk, reduced from gcc8 <string> header
preprocessed file, compile in default mode which is c++14

Line 14, redefinition of __not_overloaded, previous def on line 10
namespace std
{
template < typename _Tp > _Tp __declval;
template < typename _Tp > auto declval ()->decltype (__declval < _Tp >);
template < typename ... >using __void_t = void;
template < typename, typename, typename = void >struct __not_overloaded;
template < typename _Tp, typename _Up > struct __not_overloaded <_Tp,
_Up,//line 10
__void_t < decltype (std::declval, std::declval < _Up >) >>
        {
        };
template < typename _Tp, typename _Up > struct __not_overloaded <_Tp, _Up
<span class="quote">>//line 14</span >
{
};
}</pre>
        </div>
      </p>


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