Обнаружьте и исправьте дефекты в реализации LRU‑кэша

<p>Найдите недочёты в следующем классе, из‑за которых его нельзя использовать в продакшн‑окружении.</p> <pre><code class="language-cpp"><span class="hljs-keyword">class</span> <span class="hljs-title class_">TLruCache</span> { <span class="hljs-keyword">private</span>: <span class="hljs-type">int</span> maxSize = <span class="hljs-number">0</span>; <span class="hljs-type">int</span> timestamp = <span class="hljs-number">0</span>; unordered_map&lt;<span class="hljs-type">int</span>, <span class="hljs-type">int</span>&gt; lastAccess; unordered_map&lt;<span class="hljs-type">int</span>, <span class="hljs-type">int</span>&gt; storage; set&lt;pair&lt;<span class="hljs-type">int</span>, <span class="hljs-type">int</span>&gt;&gt; orderSet;

<span class="hljs-keyword">public</span>: <span class="hljs-built_in">TLruCache</span>(<span class="hljs-type">int</span> sizeLimit) : <span class="hljs-built_in">maxSize</span>(sizeLimit) {}

<span class="hljs-function"><span class="hljs-type">void</span> <span class="hljs-title">Erase</span><span class="hljs-params">(<span class="hljs-type">int</span> key)</span> </span>{
    <span class="hljs-keyword">if</span> (!storage.<span class="hljs-built_in">count</span>(key)) {
        <span class="hljs-keyword">throw</span> <span class="hljs-built_in">runtime_error</span>(<span class="hljs-string">"key not found"</span>);
    }
    orderSet.<span class="hljs-built_in">erase</span>({lastAccess[key], key});
    lastAccess.<span class="hljs-built_in">erase</span>(key);
    storage.<span class="hljs-built_in">erase</span>(key);
}

<span class="hljs-function"><span class="hljs-type">void</span> <span class="hljs-title">Set</span><span class="hljs-params">(<span class="hljs-type">int</span> key, <span class="hljs-type">int</span> value)</span> </span>{
    <span class="hljs-keyword">if</span> (storage.<span class="hljs-built_in">count</span>(key)) {
        orderSet.<span class="hljs-built_in">erase</span>({lastAccess[key], key});
        storage.<span class="hljs-built_in">erase</span>(key);
        lastAccess.<span class="hljs-built_in">erase</span>(key);
    }
    <span class="hljs-keyword">if</span> (orderSet.<span class="hljs-built_in">size</span>() == maxSize) {
        <span class="hljs-keyword">auto</span> [_, evictKey] = *orderSet.<span class="hljs-built_in">begin</span>();
        <span class="hljs-built_in">Erase</span>(evictKey);
    }
    lastAccess[key] = timestamp++;
    storage[key] = value;
    orderSet.<span class="hljs-built_in">insert</span>({lastAccess[key], key});
}

<span class="hljs-function"><span class="hljs-type">int</span> <span class="hljs-title">Get</span><span class="hljs-params">(<span class="hljs-type">int</span> key)</span> </span>{
    <span class="hljs-keyword">if</span> (!storage.<span class="hljs-built_in">count</span>(key)) {
        <span class="hljs-keyword">throw</span> <span class="hljs-built_in">runtime_error</span>(<span class="hljs-string">"key not found"</span>);
    }
    orderSet.<span class="hljs-built_in">erase</span>({lastAccess[key], key});
    lastAccess[key] = timestamp++;
    orderSet.<span class="hljs-built_in">insert</span>({lastAccess[key], key});
    <span class="hljs-keyword">return</span> storage[key];
}

}; </code></pre>