<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/104227>104227</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Clang crashed when used [[no_unique_address]].
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          Adttil
      </td>
    </tr>
</table>

<pre>
    See on godbolt : [https://gcc.godbolt.org/z/68ET15Thn](https://gcc.godbolt.org/z/68ET15Thn)
This simple code make clang crashed. It seems to be related to `[[no_unique_address]]`.   
Removing `[[no_unique_address]]` from `wrapper` or adding `[[no_unique_address]]` to `foo` as stated in the comments will result in successful compilation.  
```cpp
#include <type_traits>
#include <utility>

struct E{};

struct wrapper{
    [[no_unique_address]] // delete this
    E value{};
};

struct foo{
    //[[no_unique_address]] // or add this
    wrapper value{};

    constexpr auto fn()const{
 return 0;
    }
};

int main(){
    auto a = foo{}.fn();
}
```

</pre>
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