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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 --- - Clang name lookup finds name inappropriately"
   href="http://llvm.org/bugs/show_bug.cgi?id=20733">20733</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Clang name lookup finds name inappropriately
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>3.4
          </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>hyrosen@mail.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>For this code in file g.cpp:

template <class  > struct A              { enum { V }; };
template <int    > struct C              {             };
template <class T> struct S : C<A<T>::V> {             };

void F(const S<void> & = S<void>()) { V; }

clang reports

g.cpp:5:39: warning: expression result unused [-Wunused-value]
void F(const S<void> & = S<void>()) { V; }
                                      ^
1 warning generated.

Obviously there is no bare 'V' that should be visible in F. GCC says

g.cpp: In function 'void F(const S<void>&)':
g.cpp:5:39: error: 'V' was not declared in this scope
 void F(const S<void> & = S<void>()) { V; }
                                       ^

The clang AST says that the 'V' in 'F' is:
DeclRefExpr <col:39> 'enum A<void>::<anonymous at g.cpp:1:44>'
 EnumConstant 'V' 'enum A<void>::<anonymous at g.cpp:1:44>'</pre>
        </div>
      </p>
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