<p></p>
<p><b>@joto</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/openstreetmap/osm2pgsql/pull/1176#discussion_r428502378">src/osmdata.cpp</a>:</p>
<pre style='color:#555'>>  
     static osmid_t pop_id(pending_queue_t &queue, std::mutex &mutex)
     {
         osmid_t id = 0;
 
         std::lock_guard<std::mutex> const lock{mutex};
         if (!queue.empty()) {
-            id = queue.top();
-            queue.pop();
+            id = queue.back();
+            queue.pop_back();
</pre>
<p><code>stack::top()</code> calls the underlying containers <code>back()</code> function, and <code>pop()</code> calls <code>pop_back()</code>. So I believe we are doing exactly the same here.</p>

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