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Fix crash when disabling "Show in groups"
The problem was that items are removed from m_visibleGroups while a QMutableHashIterator iterates over this hash, such that the iterator can become invalid. The solution is to use a QHashIterator instead, which takes a copy of the hash. Therefore, it is not affected if m_visibleGroups is modified in any way. BUG: 323248 FIXED-IN: 4.11.1 REVIEW: 111919
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@ -1237,8 +1237,10 @@ void KItemListView::slotGroupedSortingChanged(bool current)
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if (m_grouped) {
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updateGroupHeaderHeight();
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} else {
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// Clear all visible headers
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QMutableHashIterator<KItemListWidget*, KItemListGroupHeader*> it (m_visibleGroups);
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// Clear all visible headers. Note that the QHashIterator takes a copy of
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// m_visibleGroups. Therefore, it remains valid even if items are removed
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// from m_visibleGroups in recycleGroupHeaderForWidget().
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QHashIterator<KItemListWidget*, KItemListGroupHeader*> it(m_visibleGroups);
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while (it.hasNext()) {
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it.next();
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recycleGroupHeaderForWidget(it.key());
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