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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 - Unable to parse main() when importing module interface"
   href="https://bugs.llvm.org/show_bug.cgi?id=35011">35011</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Unable to parse main() when importing module interface
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>5.0
          </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>enhancement
          </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>mferoldif@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=19323" name="attach_19323" title="Clang's reproducible crash files">attachment 19323</a> <a href="attachment.cgi?id=19323&action=edit" title="Clang's reproducible crash files">[details]</a></span>
Clang's reproducible crash files

Clang crashes when trying to compile a simple translation unit containing an
`import` statement.

How to reproduce:

    $ cat math.mxx
    #include <utility>

    export module math;

    export namespace math
    {
      template <typename... Ts>
        decltype(auto) sum(Ts && ...values)
        {
          return (std::forward<Ts>(values) + ... + 0);
        }
    }

    $ cat main.cpp
    import math;

    int main()
    {
      return math::sum(1, 2, 3);
    }

    $ clang++ -std=c++2a -fmodules-ts --precompile -x c++-module -o math.pcm
math.mxx
    $ clang++ -std=c++2a -fmodules-ts -o math.pcm.o -c math.pcm
    $ clang++ -std=c++2a -fmodules-ts -fmodule-file=math.pcm main.cpp

Crash log: <a href="https://p.iotek.org/z17">https://p.iotek.org/z17</a></pre>
        </div>
      </p>


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