<html>
    <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 --- - variable template specialization, lambda and std::tuple"
   href="http://llvm.org/bugs/show_bug.cgi?id=22402">22402</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>variable template specialization, lambda and std::tuple
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>3.5
          </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++14
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>bsun.pku@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The related code is:

```
#include <tuple>
#include <iostream>

template <int I, typename =void>
bool foo;

template <>
auto foo<1, void> = std::make_tuple(1, [](auto){});

template <int I>
auto foo<I, std::enable_if_t<I==2>> = std::make_tuple(I, [](auto){});

auto foo_3 = std::make_tuple(3, [](auto){});
template <int I>
auto foo<I, std::enable_if_t<I==3>> = foo_3;

template <int I>
auto foo<I, std::enable_if_t<I==4>> = std::make_tuple(I);

int main() {
    std::cout << std::get<0>(foo<1>) << std::endl;  // OK, prints 1
    std::cout << std::get<0>(foo<2>) << std::endl;  // ERROR, won't compile
    std::cout << std::get<0>(foo<3>) << std::endl;  // ERROR, prints 0
    std::cout << std::get<0>(foo<4>) << std::endl;  // OK, prints 4
}
```

Am I missing anything here?</pre>
        </div>
      </p>
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