<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/54599>54599</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Cryptic error "duplicate symbol: __foo.thunk.0 defined in <internal>"
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            lld:MachO
      </td>
    </tr>

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

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

<pre>
    1. Download https://drive.google.com/file/d/1C6gl6g6ovSTzfPVyEqgaFI4VM5ZaLz7Y/view?usp=sharing
2. `tar zxf repro_internal.tar.gz && cd repro`
3. ```
    ~/src/llvm-project/out/gn/bin/ld64.lld @response.txt
   ld64.lld: error: duplicate symbol: __ZN15partition_alloc8internal12_GLOBAL__N_126FreelistCorruptionDetectedEm.thunk.0
   >>> defined in <internal>
   >>> defined in <internal>

   ld64.lld: error: duplicate symbol: __ZN15partition_alloc8internal12_GLOBAL__N_126FreelistCorruptionDetectedEm.thunk.0
   >>> defined in <internal>
   >>> defined in <internal>

   ld64.lld: error: duplicate symbol: __ZN15partition_alloc8internal12_GLOBAL__N_126FreelistCorruptionDetectedEm.thunk.0
   >>> defined in <internal>
   >>> defined in <internal>
   ```

The input is probably invalid in some way, but the error is very cryptic and not helpful.
</pre>
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