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POFeed a QList with another
 

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    <p>hi i'm trying to send a QList as a parameter to another class but for some reason i got a read access violation...</p> <p><strong>CompareTimeChannel.h</strong></p> <pre><code> class CompareTimeChannel : public IDataChannel public: // @brief The method used to receive the list void setData(const QList&lt; QSharedPointer&lt;core::ITrackSection&gt; &gt; &amp; sections); // @brief The list QList&lt; QSharedPointer&lt;core::ITrackSection&gt; &gt; _sections; }; </code></pre> <p><strong>CompareTimeChannel.cpp</strong></p> <pre><code> // @brief Empty constructor CompareTimeChannel::CompareTimeChannel() { } void CompareTimeChannel::setData(const QList&lt; QSharedPointer&lt;core::ITrackSection&gt; &gt; &amp; sections) { //_sections = *new QList&lt; QSharedPointer&lt;core::ITrackSection&gt; &gt; (); _sections.clear(); _sections.append(sections); } </code></pre> <p>Running this code will throw <code>Exception at 0x31cc78d, code: 0xc0000005: read access violation at: 0x4, flags=0x0</code> on <code>_sections.clear();</code></p> <p>I tried to initialize the list before (the commented line <code>_sections = *new QList&lt;...&gt;</code>) but the exception is thrown the same.</p> <p>An answer would be very appreciated...</p> <p><strong>EDIT</strong></p> <p>Ok it's fixed!</p> <p>First, like @AndreasT said, i had to initialize the default QList constructor.</p> <p>Then, according to @10WaRRioR01 's answer, the issue comes from <code>CompareTimeChannel</code> which wasn't initialized the first time the method was called. Fixed using :</p> <pre><code> CompareTimeChannel* chan = static_cast&lt;CompareTimeChannel*&gt;(channel); Q_ASSERT(chan); if (chan) { chan-&gt;setData(sections); } else { qDebug() &lt;&lt; "Dynamic cast failure"; } </code></pre> <p>Thank you all, guys!</p>
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