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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 - Can not use a struct type of base containing both enum and protected destructor"
   href="https://bugs.llvm.org/show_bug.cgi?id=47365">47365</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Can not use a struct type of base containing both enum and protected destructor
          </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>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>tangyixuan@mail.dlut.edu.cn
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The following code is accepted by g++, while is rejected by clang++.

$ cat s.cpp

enum class A {
};

struct B {
    A a;
protected:
    ~B() = default;
};

struct C : B {
};

int main(){
    C c{};
}

$ g++ -c s.cpp
success.

$ clang++ -v
clang version 11.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
ab4627364aefcaac751e757b721b7d07b48a545a)
Target: x86_64-unknown-linux-gnu
Thread model: posix

$ clang++ -c s.cpp

s.cpp:14:9: error: temporary of type 'B' has protected destructor
    C c{};
        ^
s.cpp:7:5: note: declared protected here
    ~B() = default;  
    ^
1 error generated.</pre>
        </div>
      </p>


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