<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/123300>123300</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Clang-repl fails while trying Lambdas with capture
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          anutosh491
      </td>
    </tr>
</table>

<pre>
    Unfortunately I didn't have clang-repl built locally while trying this but I tried in through xeus-cpp (a C++ Jupyter Kernel that is based on clang-repl) and also through xeus-cpp-lite (xeus-cpp + jupyterlite that helps run clang-repl completely in the browser, here's a link to try it out https://compiler-research.github.io/xeus-cpp/lab/index.html

The following fails (or rather leads to a kernel crash in my case)

```
int x = 42;
auto capture = [&]() { return x * 2; };
std::cout << capture() << "\n"; // Output: 84
```



The error message is this 

```
Assertion failed: getPtr() && "getFETokenInfo on an empty DeclarationName!", at: /home/runner/work/recipes/recipes/output/bld/rattler-build_llvm_1734801187/work/clang/include/clang/AST/DeclarationName.h,503,getFETokenInfo)
```
</pre>
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