https://bugs.kde.org/show_bug.cgi?id=328359
--- Comment #69 from m_loui...@yahoo.com --- The crash is caused by this code around musicbrainz/MusicBrainzTagsModel.cpp:205: if( !index.isValid() || !parent( index ).isValid() ) [...] static_cast<MusicBrainzTagsItem *>( index.internalPointer())->childCount() [...] ie the internal pointer of an invalid item is dereferenced. Checking that the pointer in not null before using it makes the crash go away: if( !index.isValid() || !parent( index ).isValid() ) { // Disable items with no children. MusicBrainzTagsItem *item = static_cast<MusicBrainzTagsItem *>( index.internalPointer() ); if ( !item || item->childCount() == 0 ) return QAbstractItemModel::flags( index ) ^ Qt::ItemIsEnabled; } When the crash is gone, empty rows show up in the track list. The corresponding QModelIndex are invalid, and I think these are the ones created in MusicBrainzTagsModel::index when childItem is null. This should not happen, because in principle row < parentItem->childCount(), but sometimes it's not the case. I suspect the check for !parent.isValid() in MusicBrainzTagsModel::rowCount may be the root cause of everything, but I was unable to understand how to fix the problem. -- You are receiving this mail because: You are watching all bug changes.