<p dir="auto"><code>std::strerror()</code> is not thread-safe, so it is best avoided. Also the output of the error messages will be more uniform this way.</p>
<p dir="auto">There is one other case where we use <code>strerror()</code> (in <a href="https://github.com/openstreetmap/osm2pgsql/blob/master/src/expire-tiles.cpp#L44">expire-tiles.cpp</a>) but that's only a warning, so we can't replace it by <code>system_error</code>, although maybe it shouldn't be a warning? Leaving that for later, the expire code needs some work anyway.</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/openstreetmap/osm2pgsql/pull/1634'>https://github.com/openstreetmap/osm2pgsql/pull/1634</a></p>

<h4>Commit Summary</h4>
<ul>
  <li><a href="https://github.com/openstreetmap/osm2pgsql/pull/1634/commits/de32d6a5843d9c7f5c16ae15314281a62507b5dc" class="commit-link">de32d6a</a>  Use std::system_error instead of runtime_error/strerror</li>
</ul>

<h4 style="display: inline-block">File Changes </h4> <p style="display: inline-block">(<a href="https://github.com/openstreetmap/osm2pgsql/pull/1634/files">2 files</a>)</p>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/osm2pgsql/pull/1634/files#diff-a8eea9738eb1b17b373a490a1543ce42400ca81da9f3a943a059a4a3c377a705">src/node-persistent-cache.cpp</a>
    (7)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/osm2pgsql/pull/1634/files#diff-ebe8a6dda90254ae93bff2dd2b6b4ccaa5421a1f78a2fc291dc7cd1969d00f07">src/taginfo.cpp</a>
    (11)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/openstreetmap/osm2pgsql/pull/1634.patch'>https://github.com/openstreetmap/osm2pgsql/pull/1634.patch</a></li>
  <li><a href='https://github.com/openstreetmap/osm2pgsql/pull/1634.diff'>https://github.com/openstreetmap/osm2pgsql/pull/1634.diff</a></li>
</ul>

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