For testing purposes I created a test file with only a simple function.

I then exported the function in the xml file and generated the binding with shiboken6.

When I tried to import the module in python, I got a segmentation fault.

After a little bit of debugging it looks like the function FinishSignatureInitialization (https://code.qt.io/cgit/pyside/pyside-setup.git/tree/sources/shiboken6/libshiboken/signature/signature.cpp?h=6.6.2#n464)

is missing the call to init_shibokensupport_module() that the other functions have at the start.

This causes the segmentation fault when the uninitialized pyside_globals variable is accessed in PySide_BuildSignatureArgs.

This only happens when no classes are exported because then no InitSignatureStrings() is called in any of the class init functions. This would otherwise initialise the variable before the call to FinishSignatureInitialization at the end in the module_warpper.cpp