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Invalid cast for alreadyAllocatedCPPObject in ConvertPythonToQt #701

Job	Run time
ubuntu (22.04)	8s
macOS (latest, 3.11, 5.12.*, debug)	8s
macOS (latest, 3.9, 5.9.*, release)	6s
windows (win64_mingw73, 3.10, 5.12.*, x64)	5m 0s
ubuntu (24.04)	8s
oldschool (rockylinux, 9, debug)	8s
macOS (latest, 3.9, 5.9.*, debug)	10s
oldschool (rockylinux, 9, release)	7s
windows (win32_mingw53, 3.6, x86, 5.11.*)	1s
windows (win64_msvc2017_64, 3.6, x64, 5.11.*)	7s
windows (win64_msvc2019_64, 3.13, x64, 5.15.*, PythonQtCore PythonQtGui PythonQtMultimedia)	1s
	6m 4s

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