CALL_FUNCTION_VAR and CALL_FUNCTION_VAR_KW in 3.5

[serhiy-storchaka]

There was a subtle change in order of argument for CALL_FUNCTION_VAR and CALL_FUNCTION_VAR_KW in CPython 3.5. In earlier versions *args is passed after keyword arguments. In 3.5 it is passed before them. See https://bugs.python.org/issue33216.

In addition you can pass multiple *args and **kwargs in 3.5. They are merged into a single tuple and dict with new opcodes BUILD_LIST_UNPACK and BUILD_MAP_UNPACK_WITH_CALL.