<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/56379>56379</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            std::source_location line number wrong when used as default argument value
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          IGR2014
      </td>
    </tr>
</table>

<pre>
    Consider the following code snipet ([CompilerExplorer link](https://godbolt.org/z/3h3n5Moj6)):
```
#include<source_location>
#include<iostream>

void test_source_location(std::source_location src = std::source_location::current()) {
    std::cout << "called at " << src.line() << "\n";
}

int main() {
    test_source_location();
}
```

The output results for Clang, GCC and MSVC (left-to-right) are:

As you can see - both GCC and MSVC reports function INVOCATION line number, while Clang report function DECLARATION-one

</pre>
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