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Elvis Angelaccio authored
`QDialog::exec()` is bad and should not be used unless strictly necessary. The exec() call is blocking and anything can happen before it returns to the caller. The old workaround is to use a `QPointer` to guard the dialog. Yet there is a crash when calling `QCoreApplication::quit()` via dbus while the dialog is open. The proper fix is to call the dialog in a non-blocking way. Nowadays this is trivial thanks to C++11 lambdas. Differential Revision: D1786
0d16e7d0