Details
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Bug
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Resolution: Done
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P2: Important
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5.15.0
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None
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789d487cb0f4ef6f9d3e7c6ab5c5283dfe8dd350 (qt/qtbase/dev) 0790249acf069d89f6debc98eab4caf5b8ca2712 (qt/qtbase/5.15)
Description
QComboBox::setPlaceholderText() was introduced in 5.15, but has the following bug:
When using it, QComboBox::currentText() will change.
This is unexpected and different than the QLineEdit behaviour.
The placeholder text should never leak out, as it's not data, it's just a visual aid.
#include <QDebug>
#include <QApplication>
#include <QComboBox>
#include <QLineEdit>
int main(int a, char **b) {
QApplication app(a, b);
QLineEdit l;
l.setPlaceholderText("foo");
QComboBox c;
c.setPlaceholderText("foo");
qDebug() << c.currentText() << l.text(); // Prints "foo" ""
return 0;
}