diff --git a/src/libs/ifc/xml/vabstractpattern.cpp b/src/libs/ifc/xml/vabstractpattern.cpp
index cc9fd797c..7b11f0646 100644
--- a/src/libs/ifc/xml/vabstractpattern.cpp
+++ b/src/libs/ifc/xml/vabstractpattern.cpp
@@ -2612,6 +2612,8 @@ auto VAbstractPattern::GetGroups(const QString &patternPieceName) -> QMap<quint3
         QDomElement const groups = CreateGroups(patternPieceName);
         if (not groups.isNull())
         {
+            QVector<QPair<quint32, quint32>> items;
+
             QDomNode domNode = groups.firstChild();
             while (not domNode.isNull())
             {
@@ -2630,7 +2632,7 @@ auto VAbstractPattern::GetGroups(const QString &patternPieceName) -> QMap<quint3
                             groupData.tags = FilterGroupTags(GetParametrEmptyString(group, AttrTags));
                             groupData.tool = GetParametrUInt(group, AttrTool, NULL_ID_STR);
 
-                            QVector<QPair<quint32, quint32>> items;
+                            items.resize(0);
 
                             const QDomNodeList nodeList = group.childNodes();
                             const qint32 num = nodeList.size();
diff --git a/src/libs/ifc/xml/vpatternconverter.cpp b/src/libs/ifc/xml/vpatternconverter.cpp
index 43beb34c9..618006055 100644
--- a/src/libs/ifc/xml/vpatternconverter.cpp
+++ b/src/libs/ifc/xml/vpatternconverter.cpp
@@ -1186,13 +1186,15 @@ void VPatternConverter::ParseModelingToV0_2_4(const QDomElement &modeling)
     // TODO. Delete if minimal supported version is 0.2.4
     Q_STATIC_ASSERT_X(VPatternConverter::PatternMinVer < FormatVersion(0, 2, 4), "Time to refactor the code.");
 
+    QVector<quint32> children;
+
     QDomElement node = modeling.firstChild().toElement();
     while (not node.isNull())
     {
         if (node.tagName() == *strTools)
         {
             const quint32 toolId = node.attribute(*strId).toUInt();
-            QVector<quint32> children;
+            children.resize(0);
             QDomElement childNode = node.nextSibling().toElement();
             while (not childNode.isNull())
             {
@@ -2221,6 +2223,8 @@ void VPatternConverter::TagUnionDetailsToV0_4_0()
     // TODO. Delete if minimal supported version is 0.4.0
     Q_STATIC_ASSERT_X(VPatternConverter::PatternMinVer < FormatVersion(0, 4, 0), "Time to refactor the code.");
 
+    QVector<QDomElement> nodes;
+
     const QDomNodeList list = elementsByTagName(*strTools);
     for (int i = 0; i < list.size(); ++i)
     {
@@ -2230,7 +2234,7 @@ void VPatternConverter::TagUnionDetailsToV0_4_0()
         {
             const QStringList tags = QStringList() << *strDet << *strChildren;
 
-            QVector<QDomElement> nodes;
+            nodes.resize(0);
             QDomElement tagChildrenNodes = createElement(*strChildren);
 
             const QDomNodeList childList = toolDOM.childNodes();