@BigBen said in Potential memory leak in QSignalMapper : Qt version 6.3.0:

connect(myMapper, SIGNAL(mapped(int)), this, SLOT(up(int)));

I'm pretty sure that this:
connect(myMapper, SIGNAL(mapped(int)), this, SLOT(up(int)));

should not be done in the loop.
There should only be one connect of the mapper to the receiving object

@Kushan Simple C++:

class Dialog2 : public QDialog { Q_OBJECT private slots: void receiveValue2 (QString val) public: QString Value explicit Dialog2(QWidget *parent = 0); ~Dialog2(); void setValue(const QString &val) { Value=val; } private: Ui::Dialog2 *ui; }; ... void MainWindow::on_pushButton_clicked() { value=ui->line_Edit->text(); Dialog dialog1; dialog1.setValue(value); }

@hskoglund calling removeMappings() and then setMapping seems to work. Thanks