I have an application built on QT 5.1.1 that makes use of the QLineEdit.

In Designer the EchoMode is set to Password.

In the code I attach a validator to the QLineEdit:

decValidator = new QIntValidator(0, 9999, ui->password);
ui->password->setValidator(decValidator);

When the validator is attached, no characters show at all, even though the cursor moves like a character was entered when a button is pressed. When the validator reaches maximum count, the cursor goes back to the starting position. At no point during this was any text shown.

On disabling the validator, the asterisks show up fine and the QLineEdit behaves as expected.

This is also a regression, the QLineEdit + Validator worked fine with qt 4.8.4