<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/54728>54728</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang-tidy][run-clang-tidy.py] Uninformative error message after changes to binary discovery
        </td>
    </tr>

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

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

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

<pre>
    Commit 5da83eeb91bab848a096db7521c6d8be29231665 broke our clang-tidy invocation ([here](https://github.com/qogecoin/rules_ll/blob/a9dabb7d2c0d7dba93a100cbce3ee4717c5a1d85/ll/compilation_database.bzl#L87)).

I suspect that after the changes the automatic binary discovery somehow does not work with the `-clang-tidy-binary` option.

My issue is that the error message `Unable to run clang-tidy.` (from [here](https://github.com/llvm/llvm-project/blob/3b1314f4de63db771f1d93e1da06f14e7f3babab/clang-tools-extra/clang-tidy/tool/run-clang-tidy.py#L317)) is not very helpful for debugging (missing binary? threading issue? something else?) 😅. May be a bug as well. Currently looking into it and will post an update as soon as we find a fix on our side.

Tagging @SAtacker as you are the one who wrote this commit.
</pre>
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