<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 --- - Regression for gcc pr43559"
   href="https://llvm.org/bugs/show_bug.cgi?id=24566">24566</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Regression for gcc pr43559
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>trunk
          </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>abramo.bagnara@bugseng.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>$ cat partial7.C 
// PR c++/43559

template<typename T, typename U> void f(U&) { }
template<typename T, typename U> void f(T const&) { }

int main()
{
        int a;
        f<int, int const>(a);
}
$ clang++-3.6 -c partial7.C
$ clang++-3.8 -c partial7.C 
partial7.C:9:9: error: call to 'f' is ambiguous
        f<int, int const>(a);
        ^~~~~~~~~~~~~~~~~
partial7.C:3:39: note: candidate function [with T = int, U = const int]
template<typename T, typename U> void f(U&) { }
                                      ^
partial7.C:4:39: note: candidate function [with T = int, U = const int]
template<typename T, typename U> void f(T const&) { }
                                      ^
1 error generated.</pre>
        </div>
      </p>
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