<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/129986>129986</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Constexpr template member function call is not taken as a constant expression
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

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

<pre>
        class X
    {
    public:
 constexpr X()
        {
            Foo(1);
        }
    
 template <typename T>
        constexpr void Foo(T value)
        {
 }
    };
    
    constexpr X x;

The above code produces the following compilation error:

    error: constexpr variable 'x' must be initialized by a constant expression
    | constexpr X x;
    |             ^
 note: undefined function 'Foo<int>' cannot be used in a constant expression
 |         Foo(1);
    |         ^
    note: in call to 'X()'
    | constexpr X x;
    |             ^
    note: declared here
    | constexpr void Foo(T value)
    |                    ^

When Foo is a global function, no error occurs.

</pre>
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