<p>Be a bit more verbose in case of errors, to make finding the root cause easier</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/openstreetmap/mod_tile/pull/235'>https://github.com/openstreetmap/mod_tile/pull/235</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>include details in error log message</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/mod_tile/pull/235/files#diff-531f2ce0748b97527d6baf14e5c0dec0db585fbf1bf9eec14511a34eaf797575">src/mod_tile.c</a>
    (4)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/openstreetmap/mod_tile/pull/235.patch'>https://github.com/openstreetmap/mod_tile/pull/235.patch</a></li>
  <li><a href='https://github.com/openstreetmap/mod_tile/pull/235.diff'>https://github.com/openstreetmap/mod_tile/pull/235.diff</a></li>
</ul>

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