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    <head>
      <base href="http://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 --- - using-declaration for a name declared previously via a using-declaration introducing a non-typedef class/enumeration name"
   href="http://llvm.org/bugs/show_bug.cgi?id=18269">18269</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>using-declaration for a name declared previously via a using-declaration introducing a non-typedef class/enumeration name
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </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>hstong@ca.ibm.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>It seems Clang has a bad check for whether the first using-declaration in the
case below introduces a class name or enumeration name that is not a typedef
name.

SOURCE:
int A;
namespace Type {  struct A;  }

void f5() {
  using Type::A;
  using ::A;
}

OUTPUT:
cltybad.cc:6:11: error: target of using declaration conflicts with declaration
already in scope
  using ::A;
          ^
cltybad.cc:1:5: note: target of using declaration
int A;
    ^
cltybad.cc:5:15: note: conflicting declaration
  using Type::A;
              ^
1 error generated.

VERSION INFORMATION:
clang version 3.5
Target: powerpc64-unknown-linux-gnu
Thread model: posix</pre>
        </div>
      </p>
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