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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Wzero-as-null-pointer-constant when using defaulted operator<=>"
   href="https://bugs.llvm.org/show_bug.cgi?id=50877">50877</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Wzero-as-null-pointer-constant when using defaulted operator<=>
          </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>Windows NT
          </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++2a
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>mike.winterberg@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=24983" name="attach_24983" title="possible patch for the problem">attachment 24983</a> <a href="attachment.cgi?id=24983&action=edit" title="possible patch for the problem">[details]</a></span>
possible patch for the problem

See bug <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - Wzero-as-null-pointer-constant warns when using `operator<=>`"
   href="show_bug.cgi?id=44325">https://bugs.llvm.org/show_bug.cgi?id=44325</a> for what is happening that
produces the 0 -> nullptr conversion.

Compiling this code with -Wzero-as-null-pointer-constant

#include <compare>
struct Point {
    int x{}, y{}, z{};
    auto operator<=>(const Point&) const = default;
};

int main() {
    return Point{} < Point{};
}

Produces three -Wzero-as-null-pointer-constant warnings, one for each member of
Point. Fortunately suppressing the warning at the implementation site of
operator<=> suppresses it for users.

Live example: <a href="https://gcc.godbolt.org/z/3n9Kf3baa">https://gcc.godbolt.org/z/3n9Kf3baa</a>

The fix is seemingly very close the fix to #44325, but the build environment I
have that can build clang doesn't have "enough" to actually run the tests so I
don't know if my possible fix ends up suppressing the warning in other cases.</pre>
        </div>
      </p>


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