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## This file is part of the test suite of PySide2.
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import unittest

from PySide2 import QtCore, QtWidgets
from helper import UsesQApplication

class TestBugPYSIDE189(UsesQApplication):

    def testDisconnect(self):
        # Disconnecting from a signal owned by a destroyed object
        # should raise an exception, not segfault.
        def onValueChanged(self, value):
            pass

        sld = QtWidgets.QSlider()
        sld.valueChanged.connect(onValueChanged)

        sld.deleteLater()

        QtCore.QTimer.singleShot(0, self.app.quit)
        self.app.exec_()

        self.assertRaises(RuntimeError, sld.valueChanged.disconnect, onValueChanged)


if __name__ == '__main__':
    unittest.main()