[REG 5.8.0->5.9] QML: Crash when calling Qt.binding(foo.bind())

The following minimal QML code crashes Qt 5.9 and Qt 5.9.1 on Linux and Windows. Real-world bind examples crash too.

Qt 5.8 and Qt 5.7.1 are not affected.

Component.onCompleted: {
   function foo() { return "I am foo" }
   var bound = foo.bind()
   Qt.binding(bound)
}