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    <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 - [Modules] Explicit/partial specialization is not reachable"
   href="https://bugs.llvm.org/show_bug.cgi?id=52492">52492</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[Modules] Explicit/partial specialization is not reachable
          </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>Keywords</th>
          <td>compile-fail
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>C++2b
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>johelegp@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.com, erik.pilkington@gmail.com, johelegp@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Another reachability bug. See <a href="https://godbolt.org/z/33KxaYj8h">https://godbolt.org/z/33KxaYj8h</a>, which GCC
accepts: <a href="https://godbolt.org/z/do9Yz3sds">https://godbolt.org/z/do9Yz3sds</a>.

mod.cpp:
```C++
export module mod;
export template <class> inline constexpr bool b{false};
template <> inline constexpr bool b<int>{true};
```

test.cpp:
```C++
import mod;
static_assert(b<int>);
int main() { }
```

Output:
```
test.cpp:2:15: error: explicit specialization of 'b<int>' must be imported from
module 'mod' before it is required
static_assert(b<int>);
              ^
mod.cpp:3:35: note: explicit specialization declared here is not reachable
template <> inline constexpr bool b<int>{true};
                                  ^
1 error generated.
       ^
```</pre>
        </div>
      </p>


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