Unable to convert a C++ 'QWebEngineFindTextResult' instance to a Python object

[Phil Thompson]

On 07/05/2020 15:25, Florian Bruhin wrote:
> Hey,
> 
> I got a report from someone using:
> 
> - Qt 5.14.1 (both QT_VERSION_STR and qVersion())
> - PyQt 5.14.1
> - sip 4.19.21
> 
> - QtWebEngine 5.14.1
> - PyQtWebEngine 5.14.0 (note the .0)
> 
> - Python 3.6.10
> - Gentoo Linux
> 
> Where emitting the QWebEnginePage.findTextFinished signal (added in Qt 
> 5.14)
> results in:
> 
>   TypeError: unable to convert a C++ 'QWebEngineFindTextResult' 
> instance to a
>   Python object
> 
> In a similar vein, trying to import it via:
> 
>   python3 -c "from PyQt5.QtWebEngineCore import 
> QWebEngineFindTextResult"
> 
> results in:
> 
>   ImportError: cannot import name 'QWebEngineFindTextResult'
> 
> Test script:
> 
> --------------------------------------------------
> 
> from PyQt5.QtWebEngineWidgets import QWebEngineView
> from PyQt5.QtWidgets import QApplication
> from PyQt5.QtCore import QUrl, QTimer, pyqtSlot
> 
> app = QApplication([])
> 
> view = QWebEngineView()
> view.load(QUrl('https://qutebrowser.org'))
> view.show()
> 
> # @pyqtSlot('QWebEngineFindTextResult')
> def slot(result):
>     print(result.numberOfMatches())
>     app.quit()
> 
> view.page().findTextFinished.connect(slot)
> QTimer.singleShot(5000, lambda: view.findText("qutebrowser"))
> 
> app.exec_()
> 
> --------------------------------------------------
> 
> The crash happens after 5s, after findText got called. The pyqtSlot 
> decorator
> doesn't change anything.
> 
> I can't reproduce, and also don't know about any other people who have 
> the same
> issue...
> 
> Any idea what's going on there? Is their sip version too old or 
> something?
> Was there a bug in QtWebEngine 5.14.0 which was fixed in .1? I don't 
> understand
> what's happening, because both the findTextFinished signal and the
> QWebEngineFindTextResult class is guarded by "%If (QtWebEngine_5_14_0 
> -)", so
> surely both should be available?

I can't reproduce it with current versions - sounds like their build is 
screwed.

Phil