The enum conversion code used a reinterpret_cast to int* for the C++ values for enums and flags regardless whether a plain enum or a QFlags<> was used (since it is based on the same Python type). For plain enums, this worked sort-of as long as no larger underlying type was specified. For flags, this worked by coincidence since QFlags has an int as first field, but may break as soon as QFlags is changed to accommodate larger enums. To fix this, split the converters for flags and enums. Add a separate flagsConverter field to SbkEnumTypePrivate and use that for flags. For plain enums, use a variable of std::underlying_type for the conversion. Task-number: PYSIDE-1735 Task-number: QTBUG-111926 Change-Id: Iae2e88da1de7299ab4d461e9802fa81553ed3dbc Reviewed-by: Christian Tismer <tismer@stackless.com>